CN112560162B - Method and device for reducing suspended road spectrum load of power assembly - Google Patents
Method and device for reducing suspended road spectrum load of power assembly Download PDFInfo
- Publication number
- CN112560162B CN112560162B CN201910906960.7A CN201910906960A CN112560162B CN 112560162 B CN112560162 B CN 112560162B CN 201910906960 A CN201910906960 A CN 201910906960A CN 112560162 B CN112560162 B CN 112560162B
- Authority
- CN
- China
- Prior art keywords
- power assembly
- suspension
- target power
- road spectrum
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001228 spectrum Methods 0.000 title claims abstract description 217
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000000725 suspension Substances 0.000 claims abstract description 234
- 238000006073 displacement reaction Methods 0.000 claims abstract description 64
- 230000009467 reduction Effects 0.000 claims abstract description 56
- 239000011159 matrix material Substances 0.000 claims abstract description 44
- 238000004364 calculation method Methods 0.000 claims description 37
- 238000012360 testing method Methods 0.000 claims description 18
- 230000003595 spectral effect Effects 0.000 claims description 14
- 230000003902 lesion Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 9
- 239000002184 metal Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000004836 empirical method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Landscapes
- Vehicle Body Suspensions (AREA)
Abstract
The application discloses a method and a device for reducing a suspended road spectrum load of a power assembly, wherein the method comprises the following steps: firstly, acquiring the superposition road spectrum load of the target power assembly suspended under various preset working conditions, then carrying out rain flow statistics on the superposition road spectrum load to obtain a rain flow statistical matrix, calculating the peak value and the valley value of each rain flow cycle pair stress in the rain flow statistical matrix and the corresponding displacement amplitude, then, calculating the strain amplitude corresponding to the displacement amplitude, further, calculating the first damage of the suspension rubber of the target power assembly according to the amplitude, and then reducing the suspension road spectrum load of the target power assembly by combining a preset reduction principle. Therefore, under the condition that the structural characteristics and the rigidity nonlinear characteristics of the suspension are considered, the first damage generated by the suspension rubber is calculated, and the suspension road spectrum load of the target power assembly is reduced by combining a preset reduction principle, so that the effective reduction of the suspension road spectrum load can be realized.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a method and a device for reducing a suspended road spectrum load of a power assembly.
Background
With the high-speed development of economy and the acceleration of urban speed, the utilization rate of automobiles is higher and higher, and with the increase of vehicle mileage, the requirements on the fatigue durability of various parts of the vehicles are higher and higher. The road spectrum load of a certain part of the vehicle is the force generated by road surface excitation on the part during the running process of the vehicle. In order to predict the reliability of the fatigue life of the part and shorten the period of bench test verification related to the fatigue performance of the part, the road spectrum load of the part needs to be reduced by an effective method and the real damage generated by the part is calculated.
The suspension is used as an important element for supporting the power assembly and isolating the vibration of the power assembly on the automobile, and the main material is rubber, so that the fatigue durability is an important performance focused by engineers. And because the rigidity of the suspension body has strong nonlinearity, the strain generated when the road spectrum load is received is difficult to calculate, and the road spectrum load cannot be effectively reduced and accurately calculated. The conventional calculation mode in the current engineering is to assume that the suspension is a cylinder with regular shape, and perform pseudo damage calculation on the suspension rubber by using a method of calculating metal damage, that is, the current method is only to stop the reduction of road spectrum load by using an empirical method of de-equivalence of several characteristic working condition loads, and effective reduction and accurate damage calculation cannot be performed on the suspended road spectrum load, so that the accuracy of a calculation result is low, resources are consumed, and failure modes of the suspension in vehicle running cannot be truly reproduced.
Therefore, how to utilize a more advanced method to realize effective reduction of the suspended road spectrum load of the vehicle power assembly, so as to improve the accuracy of predicting the fatigue life of suspended parts and shorten the test time of truly reproducing the failure mode of the suspension on the rack in the running process of the vehicle has become a problem to be solved.
Disclosure of Invention
The main purpose of the embodiment of the application is to provide a method and a device for reducing the suspended road spectrum load of a power assembly, which can realize the effective reduction of the suspended road spectrum load of the power assembly of a vehicle so as to improve the accuracy of predicting the fatigue life of suspended parts and shorten the test time of truly reproducing the failure mode of the suspension on a rack in the running process of the vehicle.
In a first aspect of the present application, a method for reducing a suspended road spectrum load of a powertrain is provided, including:
Acquiring superposition road spectrum loads of the suspension of the target power assembly under various preset working conditions;
Carrying out rain flow statistics on the superimposed road spectrum load to obtain a rain flow statistical matrix;
calculating peak values and valley values of stress of each rain circulation in the rain flow statistical matrix;
Calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress of each rain flow cycle;
Calculating the strain amplitude generated by the suspension of the target power assembly according to the displacement amplitude of the suspension of the target power assembly;
calculating first damage generated by the suspension rubber of the target power assembly according to the strain amplitude;
and according to the first damage and a preset reduction principle, reducing the suspended road spectrum load of the target power assembly to obtain a reduction result.
In an optional implementation manner, the obtaining the superimposed road spectrum load of the suspension of the target power assembly under a plurality of preset kinds of working conditions includes:
Collecting road spectrum load of the target power assembly suspended under each preset type of working condition;
And carrying out superposition calculation on road spectrum loads of the target power assembly suspended under each preset type of working condition to obtain the road spectrum loads after superposition.
In an alternative implementation, the method further includes:
drawing a three-dimensional model of the suspension of the target power assembly in advance;
Determining a displacement-strain curve corresponding to the suspension of the target power assembly according to the three-dimensional model;
calculating a magnitude of strain produced by the target powertrain suspension based on the magnitude of displacement of the target powertrain suspension, comprising:
and inquiring the strain amplitude corresponding to the displacement amplitude of the suspension of the target power assembly according to the displacement-strain curve.
In an alternative implementation, the calculating the first damage to the target powertrain suspension rubber based on the strain amplitude includes:
calculating the number of cycles required for rubber failure in the suspension of the target power assembly under the strain amplitude;
and calculating the first damage generated by the suspension rubber of the target power assembly according to the number of circulation times required by the failure of the rubber in the suspension of the target power assembly.
In an alternative implementation, the reduction principle includes:
the damage generated by the reduced road spectrum load to the suspension of the target power assembly is second damage; the second lesion is 1.5 times the first lesion;
dividing the reduced road spectrum load into 4 sections; the 1 st stage road spectrum load amplitude is 100% of the maximum rain flow cycle pair stress amplitude in the rain flow statistical matrix; the 2 nd-section road spectrum load amplitude is 80% of the 1 st-section road spectrum load amplitude; the 3 rd-stage spectral load amplitude is 50% of the 1 st-stage spectral load amplitude; the 4 th-section road spectrum load amplitude is 30% of the 1 st-section road spectrum load amplitude;
The ratio of the section 1 road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 3%; the ratio of the 2 nd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 7%; the ratio of the 3 rd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 10%; the ratio of the 4 th-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 80%;
the average value of the forces in the reduced road spectrum load is not more than 20% of the amplitude of the forces.
Corresponding to the above power assembly suspension road spectrum load reduction method, the application provides a power assembly suspension road spectrum load reduction device, comprising:
the acquisition unit is used for acquiring the superposition road spectrum load of the target power assembly suspended under various preset working conditions;
The statistics unit is used for carrying out rain flow statistics on the superimposed road spectrum load to obtain a rain flow statistics matrix;
The first calculation unit is used for calculating the peak value and the valley value of each rain flow cycle pair stress in the rain flow statistical matrix;
The second calculation unit is used for calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress of each rain flow cycle;
a third calculation unit for calculating a strain amplitude generated by the suspension of the target power assembly according to the displacement amplitude of the suspension of the target power assembly;
A fourth calculation unit for calculating a first damage generated by the target power assembly suspension rubber according to the strain amplitude;
and the reduction unit is used for reducing the suspended road spectrum load of the target power assembly according to the first damage and a preset reduction principle to obtain a reduction result.
In an alternative implementation, the acquiring unit includes:
The acquisition subunit is used for acquiring road spectrum loads of the target power assembly suspended under each preset type of working condition;
And the superposition subunit is used for carrying out superposition calculation on the road spectrum load of the target power assembly suspended under each preset type of working condition to obtain the road spectrum load after superposition.
In an alternative implementation, the apparatus further includes:
the drawing unit is used for drawing the three-dimensional model of the target power assembly suspension in advance;
the determining unit is used for determining a displacement-strain curve corresponding to the suspension of the target power assembly according to the three-dimensional model;
The third computing unit is specifically configured to:
and inquiring the strain amplitude corresponding to the displacement amplitude of the suspension of the target power assembly according to the displacement-strain curve.
In an alternative implementation, the fourth computing unit includes:
A cycle number calculation subunit, configured to calculate a cycle number required for rubber failure in the suspension of the target power assembly under the strain amplitude;
And the first damage calculation subunit is used for calculating the first damage generated by the suspension rubber of the target power assembly according to the number of circulation times required by the failure of the rubber in the suspension of the target power assembly.
In an alternative implementation, the reduction principle includes:
the damage generated by the reduced road spectrum load to the suspension of the target power assembly is second damage; the second lesion is 1.5 times the first lesion;
dividing the reduced road spectrum load into 4 sections; the 1 st stage road spectrum load amplitude is 100% of the maximum rain flow cycle pair stress amplitude in the rain flow statistical matrix; the 2 nd-section road spectrum load amplitude is 80% of the 1 st-section road spectrum load amplitude; the 3 rd-stage spectral load amplitude is 50% of the 1 st-stage spectral load amplitude; the 4 th-section road spectrum load amplitude is 30% of the 1 st-section road spectrum load amplitude;
The ratio of the section 1 road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 3%; the ratio of the 2 nd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 7%; the ratio of the 3 rd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 10%; the ratio of the 4 th-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 80%;
the average value of the forces in the reduced road spectrum load is not more than 20% of the amplitude of the forces.
From this, the embodiment of the application has the following beneficial effects:
The embodiment of the application provides a method and a device for reducing road spectrum load of a power assembly suspension, which are characterized in that firstly, superimposed road spectrum load of a target power assembly suspension under various preset working conditions is obtained, then, the superimposed road spectrum load is subjected to rain flow statistics to obtain a rain flow statistical matrix, the peak value and the valley value of each rain flow cycle pair stress in the rain flow statistical matrix are calculated, then, the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of each rain flow cycle pair stress is calculated, further, the strain amplitude generated by the target power assembly suspension can be calculated according to the displacement amplitude, the first damage generated by the target power assembly suspension rubber can be calculated according to the strain amplitude, and finally, the target power assembly suspension road spectrum load can be reduced according to the first damage and a preset reduction principle, so as to obtain a reduction result. Therefore, when the road spectrum load of the suspension of the power assembly is reduced, under the condition that the structural characteristics and the non-linear rigidity characteristics of the suspension are considered, the first damage generated by the suspension rubber is calculated, and then the road spectrum load of the suspension of the target power assembly is reduced according to the first damage and a preset reduction principle, so that the effective reduction of the road spectrum load of the suspension is realized, the accuracy of predicting the fatigue life of the suspension part is further improved, and the test time of truly reproducing the failure mode of the suspension on the rack in the running process of the vehicle is shortened.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for reducing the suspended road spectrum load of a powertrain according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a road spectrum load of a target power assembly suspension acquired in one cycle under a certain preset working condition in accordance with an embodiment of the present application;
FIG. 3 is a schematic diagram of a rain flow statistics matrix according to an embodiment of the present application;
FIG. 4 is a schematic illustration of force versus displacement curves for a target powertrain suspension provided by an embodiment of the present application;
FIG. 5 is a schematic diagram of a statistical matrix of displacement magnitudes of a target powertrain suspension provided by an embodiment of the present application;
FIG. 6 is a schematic view of a three-dimensional model of a target powertrain suspension rubber provided by an embodiment of the present application;
FIG. 7 is a schematic diagram of a target powertrain suspension finite element calculation boundary condition provided by an embodiment of the present application;
FIG. 8 is a graph illustrating a displacement versus strain curve for a target powertrain suspension according to an embodiment of the present application;
FIG. 9 is a schematic diagram of E-N curves corresponding to a target powertrain suspension provided by an embodiment of the present application;
FIG. 10 is a schematic diagram of a first damage matrix of a target powertrain suspension according to an embodiment of the present application;
FIG. 11 is an overall flowchart of a method for reducing a suspended road spectrum load of a powertrain according to an embodiment of the present application;
fig. 12 is a schematic diagram of a device for reducing a suspended road spectrum load of a powertrain according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As described in the background, as the driving range of a vehicle increases, there is an increasing demand for fatigue durability of various parts of the vehicle. In order to be able to predict the reliability of the fatigue life of a vehicle part and to shorten the period of bench test verification related to the fatigue performance of the part, it is necessary to reduce the road spectrum load of the part by an effective method and calculate the actual damage generated by the part.
However, the existing calculation method generally assumes the suspension to be a cylinder with regular shape, and performs pseudo damage calculation on the suspension rubber by using a method of calculating metal damage, that is, the existing method only remains the reduction of road spectrum load by using an empirical method of removing equivalents of several characteristic working condition loads, and cannot effectively reduce and accurately calculate the damage of the suspended road spectrum load, so that the accuracy of the calculation result is low, the resources are consumed, and the failure mode of the suspension in the vehicle running cannot be truly reproduced.
Based on the method and the device, the application provides a method and a device for reducing the suspended road spectrum load of a power assembly, which can realize the effective reduction of the suspended road spectrum load of the power assembly of a vehicle so as to improve the accuracy of predicting the fatigue life of suspended parts and shorten the test time of truly reproducing the failure mode of the suspension on a rack in the running process of the vehicle.
The following describes a method for reducing the suspended road spectrum load of the powertrain according to the embodiment of the present application in detail with reference to the accompanying drawings.
Referring to fig. 1, which is a flowchart illustrating an embodiment of a method for reducing a suspended road spectrum load of a powertrain according to an embodiment of the present application, the embodiment may include the following steps:
s101: and acquiring the superposition road spectrum load of the target power assembly suspension under various preset working conditions.
In the present embodiment, the powertrain mount to which the reduced-road-spectrum load is required is defined as a target powertrain mount, and the vehicle to which the target powertrain mount belongs is defined as a target vehicle. In practical application, in order to effectively reduce the road spectrum load of the power assembly suspension, firstly, various working conditions, such as emergency braking, rapid acceleration starting, simulation of high speed, large-angle climbing and the like, are preset in the real vehicle road test process, so as to simulate the real vehicle condition of a target vehicle and acquire the superimposed road spectrum load of the target power assembly suspended under the preset various working conditions.
Specifically, an alternative implementation manner may specifically include the following steps A1-A2 in the implementation procedure of the step S101:
and A1, collecting road spectrum loads of the target power assembly suspended under each preset type of working condition.
In the implementation mode, in order to effectively reduce the road spectrum load of the power assembly suspension, firstly, in the real vehicle road test process, a driving process of multiple times of circulation of a target under various preset type working conditions is simulated, and the road spectrum load of the target power assembly suspension under each preset type working condition is acquired.
Specifically, in order to shorten the suspension road spectrum load acquisition period, only the road spectrum load of the target power assembly suspension in one cycle is acquired under each preset type of working condition, as shown in fig. 2, which is a schematic diagram showing the road spectrum load of the target power assembly suspension acquired in one cycle under a certain preset type of working condition according to the embodiment of the present application.
Illustrating: in the actual test, assuming that the target vehicle is calculated to climb 100 times of major slopes in the use process of 10 years, the target vehicle needs to be simulated to repeatedly climb 100 times of major slopes in the test, namely 100 times of circulation is performed under the working condition. However, when the road spectrum load is acquired, the road spectrum data is not required to be acquired for 100 times, and the road spectrum load of the target power assembly suspension in one cycle is only acquired because the data is the same each time.
And A2, carrying out superposition calculation on road spectrum loads of the target power assembly suspended under each preset type of working condition to obtain the road spectrum loads after superposition.
After the road spectrum load of the target power assembly suspended under each preset type of working condition is acquired through the step A1, in order to obtain the whole road spectrum load of the target power assembly suspended, the road spectrum load of the target power assembly suspended under each preset type of working condition is required to be overlapped, and a specific overlapping formula is as follows:
Wherein F total represents the overall road spectrum load of the target powertrain suspension; f i represents a road spectrum load of the target power assembly suspension acquired in one cycle under the ith preset type of working condition; c i represents the number of cycles corresponding to the i-th preset type of working condition.
S102: and carrying out rain flow statistics on the superimposed road spectrum load to obtain a rain flow statistical matrix.
In this embodiment, after calculating the superimposed road spectrum load of the target power assembly suspended under multiple preset kinds of working conditions through step S101, since the road spectrum load of the target power assembly suspended is a random load and has no obvious rule, in order to facilitate subsequent analysis and calculation, it is first necessary to perform rain statistics on the obtained superimposed road spectrum load by using a dual-parameter rain flow method, so as to obtain a rain statistics matrix, as shown in fig. 3. Wherein, the double parameters refer to the amplitude and the average value of the road spectrum load. In the rain flow statistical matrix shown in fig. 3, each row of data represents the average value of the road spectrum load, each column of data represents the amplitude value of the road spectrum load, and each element in the rain flow statistical matrix represents the circulation times under the conditions of the corresponding average value and the amplitude value.
In practical application, the obtained superimposed spectrum load can be imported into nCode software, and the rainflow module in the software is utilized to carry out rain flow statistics on the superimposed spectrum load to obtain a rain flow statistical matrix, and the specific calculation process is consistent with the existing mode and is not repeated here.
S103: and calculating the peak value and the valley value of each rain circulation pair stress in the rain flow statistical matrix.
In this embodiment, after the rain flow statistical matrix is obtained in step S102, based on that the rain flow statistical result appears in the form of the road spectrum load amplitude and the average value in the rain flow statistical matrix, in order to calculate the damage of the road spectrum load after the rain flow statistics to the suspension rubber, the peak value and the valley value of each rain flow cycle pair stress in the rain flow statistical matrix can be calculated first for carrying out subsequent analysis and calculation. Wherein, peak value and valley value calculation formulas of each rain flow cycle to stress are as follows:
In practical application, the obtained data in the rain flow statistical matrix can be imported into excel, and calculated in the excel, and the specific calculation process is consistent with the existing mode, and will not be described herein.
S104: and calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress of each rain flow cycle.
In this embodiment, after calculating the peak value and the valley value of the stress of each rain cycle in the rain statistics matrix in step S103, the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress of each rain cycle may be further calculated.
Specifically, since the amount of deformation generated when the target power assembly is suspended receives a certain load is determined by its own stiffness, the stiffness of the suspension rubber needs to have a strong nonlinearity in order to ensure that the displacement of the power assembly in the front compartment of the automobile is controlled and also to attenuate the vibration generated by the power assembly.
Based on this, when calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress by each rain flow cycle, the rigidity test needs to be performed on the target power assembly suspension rubber first to obtain a force-displacement curve of the target power assembly suspension, as shown in fig. 4, wherein the abscissa represents the displacement (mm), and the ordinate represents the force (N). The specific acquisition process comprises the following steps: the target power assembly suspension is firstly installed on MTS380 equipment through a tool, the equipment applies force to the target power assembly suspension according to the requirement, and meanwhile the force applied by the equipment and the displacement generated by the target power assembly suspension are recorded. The conditions and force loading requirements at the time of the experiment are as follows:
ambient temperature: 23+/-3 ℃; MTS380 applies a load: -7000N to +7000N; the loading speed is less than 3mm/min; the target power assembly needs to be suspended in a room temperature environment for standing for more than 4 hours before testing; the method is characterized in that the pre-cyclic loading is needed for more than 3 times before the formal experiment, and the numerical value is recorded at the 4 th time; at least 4 sets of data were recorded and averaged to obtain a force-displacement curve for the target locomotion assembly suspension.
In the schematic of the force-displacement curve shown in fig. 4, the ordinate indicates the force applied by the MTS and the abscissa indicates the displacement of the suspension of the target powertrain. At this time, the peak value and the valley value of the stress of each rain cycle in the rain flow statistical matrix calculated in the step S103 are brought into the force-displacement curve shown in fig. 4, and the actual displacement of the target power assembly under the peak value and the valley value of the stress of each rain cycle can be calculated. And subtracting the peak force of each rain flow cycle counter stress from the displacement corresponding to Gu Zhili to obtain the displacement amplitude of the target power assembly suspension under the rain flow cycle counter stress, and calculating the statistical matrix of the obtained displacement amplitude of the target power assembly suspension based on the displacement amplitude, as shown in fig. 5.
S105: and calculating the strain amplitude generated by the suspension of the target power assembly according to the displacement amplitude of the suspension of the target power assembly.
In this embodiment, after calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress in each rain flow cycle in step S104, the strain amplitude generated by the target power assembly suspension may be further calculated according to the displacement amplitude of the target power assembly suspension.
Specifically, an alternative implementation manner is that, before performing step S105, the present embodiment may perform the following steps B1-B2:
and B1, pre-drawing a three-dimensional model of the suspension of the target power assembly.
In this implementation, to calculate the strain amplitude generated by the suspension of the target powertrain, first, a three-dimensional model of the suspension rubber of the target powertrain may be drawn by using existing or future drawing software, as shown in fig. 6, where the error between the design size of the three-dimensional model and the actual suspension rubber must not exceed 1%.
And B2, determining a displacement-strain curve corresponding to the suspension of the target power assembly according to the three-dimensional model.
After the three-dimensional model of the suspension of the target power assembly is drawn in advance through the step B1, the three-dimensional model can be further led into Computer aided engineering (Computer AIDED ENGINEERING, abbreviated as CAE) software, fixed constraint is applied to the portion, connected with the metal outer cover, of the suspension rubber of the target power assembly, the portion, connected with the metal framework, of the suspension rubber is coupled with the elastic center point of the rubber portion, force is applied to the elastic center point, the amplitude and the speed of the applied force are consistent with experimental conditions, and then a displacement-strain curve corresponding to the suspension of the target power assembly can be obtained through simulation, as shown in fig. 8.
Based on this, the specific implementation procedure of step S105 may include: and inquiring the strain amplitude corresponding to the displacement amplitude of the suspension of the target power assembly according to the displacement-strain curve.
Specifically, after the displacement-strain curve corresponding to the suspension of the target power assembly is determined in the step B2, the strain amplitude corresponding to the displacement amplitude of the suspension of the target power assembly may be further queried in the curve.
S106: and calculating first damage generated by the suspension rubber of the target power assembly according to the strain amplitude.
In this embodiment, after the strain amplitude generated by the suspension of the target power assembly is calculated in step S105, the damage generated by the suspension rubber of the target power assembly at the strain amplitude may be further calculated and defined as the first damage.
Specifically, an alternative implementation manner may specifically include the following steps C1-C2 in the implementation procedure of the step S106:
And step C1, calculating the number of circulation times required by rubber failure in the suspension of the target power assembly under the strain amplitude.
In this implementation manner, after the strain amplitude generated by the suspension of the target power assembly is calculated in step S105, the number of cycles required for rubber failure in the suspension of the target power assembly under the strain amplitude may be further queried according to a pre-constructed E-N curve as shown in fig. 9, where the abscissa N in fig. 9 represents the number of cycles required for rubber failure in the suspension of the target power assembly, and the ordinate E represents the strain amplitude generated by the suspension of the target power assembly.
Illustrating: as shown in fig. 9, assuming that the magnitude of the strain generated by the suspension of the target powertrain is E 0 under the peak and valley of the stress of a certain rain cycle, the number of cycles required for rubber failure in the suspension of the target powertrain at E 0 can be found to be N 0 on the E-N curve shown in fig. 9.
And step C2, calculating first damage generated by the suspension rubber of the target power assembly according to the number of circulation times required by the failure of the rubber in the suspension of the target power assembly.
And C1, calculating the number of times of circulation required by rubber failure in the suspension of the target power assembly, and further calculating the first damage generated by the suspension rubber of the target power assembly according to the number of times.
Illustrating: based on the example in step C1 above, assume that the number of cycles required for rubber failure in the target powertrain suspension at strain amplitude E 0 is N 0, and that the peak and valley forces actually occur at the peak and valley forces in the overall suspension load path spectrum for a number of cycles of N s, the peak and Gu Zhili damage to the target powertrain suspension is N s/N0.
And so on, the damage to the suspension of the target power assembly caused by the stress of all the rain circulation pairs in fig. 3 can be calculated by using the method, and the damage is subjected to superposition calculation to obtain the total damage to the suspension of the target power assembly, wherein the total damage is used as the first damage, and the corresponding damage matrix is shown in fig. 10.
S107: and according to the first damage and a preset reduction principle, reducing the suspended road spectrum load of the target power assembly to obtain a reduction result.
In this embodiment, after the first damage generated by the suspension rubber of the target power assembly is calculated in step S106, the load of the suspension road spectrum of the target power assembly can be further reduced according to the first damage and a preset reduction principle, so as to obtain a reduction result.
An alternative implementation, among others, may include the following 3:
(1) The damage of the reduced road spectrum load to the suspension of the target power assembly is second damage; wherein the second lesion is 1.5 times the first lesion.
In this implementation, a reduction rule is preset as follows: the reduced road spectrum load creates a 1.5 times the first damage to the target powertrain suspension and defines the damage as a second damage.
(2) Dividing the reduced road spectrum load into 4 sections; the load amplitude of the path spectrum of the 1 st section is 100% of the stress amplitude of the largest rain circulation pair in the rain flow statistical matrix; the 2 nd section of the road spectrum load amplitude is 80% of the 1 st section of the road spectrum load amplitude; the 3 rd-section spectral load amplitude is 50% of the 1 st-section spectral load amplitude; the 4 th-section spectral load amplitude is 30% of the 1 st-section spectral load amplitude.
And the ratio of the road spectrum load of the 1 st section to the damage generated by the suspension of the target power assembly in the second damage is 3%; the ratio of the 2 nd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 7%; the ratio of the 3 rd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 10%; the ratio of the 4 th-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 80%.
(3) The average value of the forces in the reduced road spectrum load does not exceed 20% of the amplitude of the reduced road spectrum load.
Illustrating: based on the 3-term reduction rule, assuming that the first damage calculated in step S106 is 1.0, the damage generated by the reduced road spectrum load according to the reduction rule (1) is 1.5, i.e. the second damage is 1.5. And assuming that the maximum amplitude of the acquired road spectrum load force is-8000 to 8000N, the 1 st stage road spectrum load is-8000 to 8000N, namely the span from the maximum force to the minimum force is 16000N. Then according to the reduction principle (2), the span from the maximum force to the minimum force of the 2 nd-stage road spectrum load is 16000×80% =12800N; the span of the 3 rd-stage spectral load from the maximum force to the minimum force is 16000×50+=8000N; the span of the 4 th-stage spectral load from maximum to minimum force is 16000×30+=4800n. The force amplitude of the load after each segment is reduced is thus determined. Then, according to the reduction principle (2), the damage generated by the 1 st-stage road spectrum load can be calculated as follows: 1.5 x 3% = 0.045. The 1 st stage road spectrum load calculated by the method is that the damage generated by one cycle of-8000N to 8000N is N 1, and the number of cycles required by the 1 st stage road spectrum load can be calculated by dividing N 1 by 0.045. And so on, the same processing can be performed on the 2 nd-4 th segment spectrum load. The four-segment spectrum load force after reduction and the related cycle number are shown in the following table 1:
| Sequence number | Minimum value (N) | Maximum value (N) | Number of cycles |
| Segment 1 road spectrum load | -8000 | 8000 | 300 |
| 2 Nd segment road spectrum load | -6800 | 6000 | 4000 |
| 3 Rd segment road spectrum load | -3500 | 4500 | 10000 |
| 4 Th segment road spectrum load | -1800 | 3000 | 300000 |
TABLE 1
It should be noted that, by the above method, the effective reduction of the road spectrum load of the suspension of the target power assembly can be realized, so that the failure mode of the suspension in the vehicle running can be truly reproduced in about one day on the rack, while in the conventional method, in order to truly reproduce the failure mode of the suspension in the vehicle running in a laboratory (on a test rack), two-week fatigue test needs to be performed on the rack, so that the accuracy of predicting the fatigue life of the suspension part of the target power assembly can be improved, and the test time of truly reproducing the failure mode of the suspension in the vehicle running on the rack can be shortened.
In summary, according to the method for reducing the road spectrum load of the suspension of the power assembly, which is provided by the embodiment of the application, the superimposed road spectrum load of the suspension of the target power assembly under various preset working conditions is firstly obtained, then the superimposed road spectrum load is subjected to rain statistics to obtain a rain statistics matrix, the peak value and the valley value of each rain circulation pair stress in the rain statistics matrix are calculated, then the displacement amplitude of the suspension of the target power assembly corresponding to the peak value and the valley value of each rain circulation pair stress is calculated, further, the strain amplitude generated by the suspension of the target power assembly can be calculated according to the displacement amplitude, the first damage generated by the suspension rubber of the target power assembly can be calculated according to the strain amplitude, and finally the road spectrum load of the suspension of the target power assembly can be reduced according to the first damage and the preset reduction principle, so that the reduction result is obtained. Therefore, when the road spectrum load of the suspension of the power assembly is reduced, under the condition that the structural characteristics and the non-linear rigidity characteristics of the suspension are considered, the first damage generated by the suspension rubber is calculated, and then the road spectrum load of the suspension of the target power assembly is reduced according to the first damage and a preset reduction principle, so that the effective reduction of the road spectrum load of the suspension is realized, the accuracy of predicting the fatigue life of the suspension part is further improved, and the test time of truly reproducing the failure mode of the suspension on the rack in the running process of the vehicle is shortened.
For ease of understanding, an overall flow chart of a method of curtailing powertrain suspended road spectrum load is now presented in connection with FIG. 11. The implementation process of the method for reducing the suspended road spectrum load of the power assembly provided by the embodiment of the application is introduced.
As shown in fig. 11, the implementation procedure of the embodiment of the present application is: firstly, obtaining the superposition road spectrum load of a target power assembly suspension under various preset working conditions, then carrying out rain statistics on the superposition road spectrum load to obtain a rain statistics matrix, then calculating peak force and Gu Zhili matrix of each rain circulation pair stress according to the mean value and the amplitude value in the rain statistics matrix, calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of each rain circulation pair stress through a suspension rigidity curve, calculating the strain amplitude of the target power assembly suspension corresponding to the peak force and the valley value moment array by using CAE, wherein the strain is positive, the stressed is negative, then calculating the circulation times required by rubber failure in the target power assembly suspension according to the strain amplitude, and finally calculating the first damage generated by the target power assembly suspension rubber according to the circulation times and the E-N curve in the target power assembly suspension, and finally, carrying out reduction of the target power assembly suspension road spectrum load according to the first damage and a preset reduction principle, so as to obtain a specific reduction result of the S-stage 101, and the step of reducing the road spectrum load is realized.
The above embodiment describes the technical scheme of the method of the application in detail, and correspondingly, the application also provides a device for reducing the suspended road spectrum load of the power assembly, and the device is described below.
Referring to fig. 12, fig. 12 is a block diagram of a device for reducing a suspended road spectrum load of a powertrain according to an embodiment of the present application, as shown in fig. 12, the device includes:
The acquisition unit 1201 is used for acquiring the superposition road spectrum load of the target power assembly suspended under various preset working conditions;
a statistics unit 1202, configured to perform rain flow statistics on the superimposed road spectrum load, to obtain a rain flow statistics matrix;
A first calculating unit 1203, configured to calculate a peak value and a valley value of stress of each rain cycle in the rain statistics matrix;
A second calculating unit 1204, configured to calculate a displacement amplitude of the target power assembly suspension corresponding to a peak value and a valley value of the stress of each rain flow cycle;
a third calculation unit 1205 for calculating a strain amplitude generated by the suspension of the target powertrain according to the displacement amplitude of the suspension of the target powertrain;
a fourth calculating unit 1206 for calculating a first damage generated by the target powertrain suspension rubber according to the strain amplitude;
The reduction unit 1207 is configured to reduce the suspended road spectrum load of the target power assembly according to the first damage and a preset reduction rule, so as to obtain a reduction result.
In some possible implementations of the present application, the acquiring unit 1201 includes:
The acquisition subunit is used for acquiring road spectrum loads of the target power assembly suspended under each preset type of working condition;
And the superposition subunit is used for carrying out superposition calculation on the road spectrum load of the target power assembly suspended under each preset type of working condition to obtain the road spectrum load after superposition.
In some possible implementations of the application, the apparatus further includes:
the drawing unit is used for drawing the three-dimensional model of the target power assembly suspension in advance;
the determining unit is used for determining a displacement-strain curve corresponding to the suspension of the target power assembly according to the three-dimensional model;
the third computing unit 1205 is specifically configured to:
and inquiring the strain amplitude corresponding to the displacement amplitude of the suspension of the target power assembly according to the displacement-strain curve.
In some possible implementations of the application, the fourth computing unit 1206 includes:
A cycle number calculation subunit, configured to calculate a cycle number required for rubber failure in the suspension of the target power assembly under the strain amplitude;
And the first damage calculation subunit is used for calculating the first damage generated by the suspension rubber of the target power assembly according to the number of circulation times required by the failure of the rubber in the suspension of the target power assembly.
In some possible implementations of the application, the reduction principle includes:
the damage generated by the reduced road spectrum load to the suspension of the target power assembly is second damage; the said
The second lesion is 1.5 times the first lesion;
dividing the reduced road spectrum load into 4 sections; the 1 st stage road spectrum load amplitude is 100% of the maximum rain flow cycle pair stress amplitude in the rain flow statistical matrix; the 2 nd-section road spectrum load amplitude is 80% of the 1 st-section road spectrum load amplitude; the 3 rd-stage spectral load amplitude is 50% of the 1 st-stage spectral load amplitude; the 4 th-section road spectrum load amplitude is 30% of the 1 st-section road spectrum load amplitude;
The ratio of the section 1 road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 3%; the ratio of the 2 nd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 7%; the ratio of the 3 rd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 10%; the ratio of the 4 th-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 80%;
the average value of the forces in the reduced road spectrum load is not more than 20% of the amplitude of the forces.
According to the reduction device for the suspended road spectrum load of the power assembly, provided by the embodiment of the application, the superimposed road spectrum load of the suspended power assembly under various preset working conditions is firstly obtained, then the superimposed road spectrum load is subjected to rain statistics to obtain a rain statistics matrix, the peak value and the valley value of each rain circulation pair stress in the rain statistics matrix are calculated, then the displacement amplitude of the suspended power assembly of the target corresponding to the peak value and the valley value of each rain circulation pair stress is calculated, further, the strain amplitude generated by the suspended power assembly of the target can be calculated according to the displacement amplitude, the first damage generated by the suspended rubber of the power assembly of the target can be calculated according to the strain amplitude, and finally the suspended road spectrum load of the power assembly of the target can be reduced according to the first damage and the preset reduction principle, so that the reduction result is obtained. Therefore, when the road spectrum load of the suspension of the power assembly is reduced, under the condition that the structural characteristics and the non-linear rigidity characteristics of the suspension are considered, the first damage generated by the suspension rubber is calculated, and then the road spectrum load of the suspension of the target power assembly is reduced according to the first damage and a preset reduction principle, so that the effective reduction of the road spectrum load of the suspension is realized, the accuracy of predicting the fatigue life of the suspension part is further improved, and the test time of truly reproducing the failure mode of the suspension on the rack in the running process of the vehicle is shortened.
From the above description of embodiments, it will be apparent to those skilled in the art that all or part of the steps of the above described example methods may be implemented in software plus necessary general purpose hardware platforms. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the method described in the embodiments or some parts of the embodiments of the present application.
It should be noted that, in the present description, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A method for reducing the suspended road spectrum load of a power assembly, comprising the steps of:
Acquiring superposition road spectrum loads of the suspension of the target power assembly under various preset working conditions;
Carrying out rain flow statistics on the superimposed road spectrum load to obtain a rain flow statistical matrix;
calculating peak values and valley values of stress of each rain circulation in the rain flow statistical matrix;
Calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress of each rain flow cycle comprises the following steps: performing rigidity test on the displacement amplitude of the target power assembly suspension to obtain a force-displacement curve of the target power assembly suspension; calculating the actual displacement of the target power assembly under the peak value and the valley value of the counter stress of each rain flow cycle according to the force-displacement curve of the target power assembly suspension, and subtracting the displacement corresponding to the peak value and the valley value of the counter stress of each rain flow cycle from the displacement corresponding to Gu Zhili to obtain the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the counter stress of each rain flow cycle;
Calculating the strain amplitude generated by the suspension of the target power assembly according to the displacement amplitude of the suspension of the target power assembly;
calculating first damage generated by the suspension rubber of the target power assembly according to the strain amplitude;
According to the first damage and a preset reduction principle, reducing the suspended road spectrum load of the target power assembly to obtain a reduction result;
the method further comprises the steps of:
drawing a three-dimensional model of the suspension of the target power assembly in advance;
Determining a displacement-strain curve corresponding to the suspension of the target power assembly according to the three-dimensional model;
calculating a magnitude of strain produced by the target powertrain suspension based on the magnitude of displacement of the target powertrain suspension, comprising:
inquiring a strain amplitude corresponding to the displacement amplitude of the suspension of the target power assembly according to the displacement-strain curve;
the calculating the first damage generated by the suspension rubber of the target power assembly according to the strain amplitude comprises the following steps:
calculating the number of cycles required for rubber failure in the suspension of the target power assembly under the strain amplitude;
and calculating the first damage generated by the suspension rubber of the target power assembly according to the number of circulation times required by the failure of the rubber in the suspension of the target power assembly.
2. The method of claim 1, wherein the obtaining the superimposed road spectrum load of the target powertrain suspension under a plurality of preset types of conditions comprises:
Collecting road spectrum load of the target power assembly suspended under each preset type of working condition;
And carrying out superposition calculation on road spectrum loads of the target power assembly suspended under each preset type of working condition to obtain the road spectrum loads after superposition.
3. The method of claim 1, wherein the reduction principle comprises:
the damage generated by the reduced road spectrum load to the suspension of the target power assembly is second damage; the second lesion is 1.5 times the first lesion;
Dividing the reduced road spectrum load into 4 sections; the 1 st stage road spectrum load amplitude is 100% of the maximum rain flow cycle pair stress amplitude in the rain flow statistical matrix; the 2 nd-section road spectrum load amplitude is 80% of the 1 st-section road spectrum load amplitude; the 3 rd-section road spectrum load amplitude is 50% of the 1 st-section road spectrum load amplitude; the 4 th-section road spectrum load amplitude is 30% of the 1 st-section road spectrum load amplitude;
The ratio of the section 1 road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 3%; the ratio of the 2 nd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 7%; the ratio of the 3 rd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 10%; the ratio of the 4 th-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 80%;
the average value of the forces in the reduced road spectrum load is not more than 20% of the amplitude of the forces.
4. A device for reducing the suspended road spectrum load of a power assembly, comprising:
the acquisition unit is used for acquiring the superposition road spectrum load of the target power assembly suspended under various preset working conditions;
The statistics unit is used for carrying out rain flow statistics on the superimposed road spectrum load to obtain a rain flow statistics matrix;
The first calculation unit is used for calculating the peak value and the valley value of each rain flow cycle pair stress in the rain flow statistical matrix;
The second calculation unit is used for calculating the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the stress of each rain flow cycle;
a third calculation unit for calculating a strain amplitude generated by the suspension of the target power assembly according to the displacement amplitude of the suspension of the target power assembly;
A fourth calculation unit for calculating a first damage generated by the target power assembly suspension rubber according to the strain amplitude;
The reduction unit is used for reducing the suspended road spectrum load of the target power assembly according to the first damage and a preset reduction principle to obtain a reduction result;
The second calculation unit is specifically configured to perform a stiffness test on a displacement amplitude of the suspension of the target power assembly, so as to obtain a force-displacement curve of the suspension of the target power assembly; calculating the actual displacement of the target power assembly under the peak value and the valley value of the counter stress of each rain flow cycle according to the force-displacement curve of the target power assembly suspension, and subtracting the displacement corresponding to the peak value and the valley value of the counter stress of each rain flow cycle from the displacement corresponding to Gu Zhili to obtain the displacement amplitude of the target power assembly suspension corresponding to the peak value and the valley value of the counter stress of each rain flow cycle;
The apparatus further comprises:
the drawing unit is used for drawing the three-dimensional model of the target power assembly suspension in advance;
the determining unit is used for determining a displacement-strain curve corresponding to the suspension of the target power assembly according to the three-dimensional model;
The third computing unit is specifically configured to:
inquiring a strain amplitude corresponding to the displacement amplitude of the suspension of the target power assembly according to the displacement-strain curve;
the fourth calculation unit includes:
A cycle number calculation subunit, configured to calculate a cycle number required for rubber failure in the suspension of the target power assembly under the strain amplitude;
And the first damage calculation subunit is used for calculating the first damage generated by the suspension rubber of the target power assembly according to the number of circulation times required by the failure of the rubber in the suspension of the target power assembly.
5. The apparatus of claim 4, wherein the acquisition unit comprises:
The acquisition subunit is used for acquiring road spectrum loads of the target power assembly suspended under each preset type of working condition;
And the superposition subunit is used for carrying out superposition calculation on the road spectrum load of the target power assembly suspended under each preset type of working condition to obtain the road spectrum load after superposition.
6. The apparatus of claim 4, wherein the reduction principle comprises:
the damage generated by the reduced road spectrum load to the suspension of the target power assembly is second damage; the second lesion is 1.5 times the first lesion;
dividing the reduced road spectrum load into 4 sections; the 1 st stage road spectrum load amplitude is 100% of the maximum rain flow cycle pair stress amplitude in the rain flow statistical matrix; the 2 nd-section road spectrum load amplitude is 80% of the 1 st-section road spectrum load amplitude; the 3 rd-stage spectral load amplitude is 50% of the 1 st-stage spectral load amplitude; the 4 th-section road spectrum load amplitude is 30% of the 1 st-section road spectrum load amplitude;
The ratio of the section 1 road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 3%; the ratio of the 2 nd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 7%; the ratio of the 3 rd-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 10%; the ratio of the 4 th-stage road spectrum load to the damage generated by the suspension of the target power assembly in the second damage is 80%;
the average value of the forces in the reduced road spectrum load is not more than 20% of the amplitude of the forces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910906960.7A CN112560162B (en) | 2019-09-24 | 2019-09-24 | Method and device for reducing suspended road spectrum load of power assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910906960.7A CN112560162B (en) | 2019-09-24 | 2019-09-24 | Method and device for reducing suspended road spectrum load of power assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112560162A CN112560162A (en) | 2021-03-26 |
| CN112560162B true CN112560162B (en) | 2024-05-10 |
Family
ID=75028992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910906960.7A Active CN112560162B (en) | 2019-09-24 | 2019-09-24 | Method and device for reducing suspended road spectrum load of power assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112560162B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113281069A (en) * | 2021-06-16 | 2021-08-20 | 中国第一汽车股份有限公司 | Method, device and medium for improving load precision of automobile rubber bushing endurance test |
| CN114371018B (en) * | 2021-11-30 | 2024-02-27 | 江铃汽车股份有限公司 | Bench endurance test method and system for suspension bracket of automobile power assembly |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001066228A (en) * | 1999-08-31 | 2001-03-16 | Murakami Yukitaka | Fatigue damage diagnosing device |
| CN102737148A (en) * | 2012-06-26 | 2012-10-17 | 宁波拓普集团股份有限公司 | Method for reducing road spectrum into Block Cycle |
| CN106644464A (en) * | 2016-11-18 | 2017-05-10 | 南京工业大学 | Rolling mill transmission system key component fatigue life early warning method based on load spectrum analysis |
| CN106934127A (en) * | 2017-02-28 | 2017-07-07 | 江铃汽车股份有限公司 | The stress acquisition methods of the metallic framework of powertrain mounting system |
| CN108829985A (en) * | 2018-06-21 | 2018-11-16 | 上海理工大学 | A kind of suspension dynamic K&C testing stand unidirectionally loads the preparation method of spectrum |
| CN109115523A (en) * | 2018-10-10 | 2019-01-01 | 湖南湖大艾盛汽车技术开发有限公司 | A kind of stabilizer bar rating test and fatigue endurance test rack and test method |
| DE102017217561A1 (en) * | 2017-10-04 | 2019-04-04 | Bayerische Motoren Werke Aktiengesellschaft | Method for fatigue analysis of a component |
| CN110069875A (en) * | 2019-04-28 | 2019-07-30 | 江铃汽车股份有限公司 | A kind of generation method of the load modal data of dynamic load emulation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2641174C (en) * | 2006-02-01 | 2014-03-04 | Nippon Steel Corporation | Fracture prediction method |
| EP2803968B1 (en) * | 2013-05-13 | 2019-05-08 | Siemens Industry Software NV | A process for calculating fatigue and fatigue failure of structures |
-
2019
- 2019-09-24 CN CN201910906960.7A patent/CN112560162B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001066228A (en) * | 1999-08-31 | 2001-03-16 | Murakami Yukitaka | Fatigue damage diagnosing device |
| CN102737148A (en) * | 2012-06-26 | 2012-10-17 | 宁波拓普集团股份有限公司 | Method for reducing road spectrum into Block Cycle |
| CN106644464A (en) * | 2016-11-18 | 2017-05-10 | 南京工业大学 | Rolling mill transmission system key component fatigue life early warning method based on load spectrum analysis |
| CN106934127A (en) * | 2017-02-28 | 2017-07-07 | 江铃汽车股份有限公司 | The stress acquisition methods of the metallic framework of powertrain mounting system |
| DE102017217561A1 (en) * | 2017-10-04 | 2019-04-04 | Bayerische Motoren Werke Aktiengesellschaft | Method for fatigue analysis of a component |
| CN108829985A (en) * | 2018-06-21 | 2018-11-16 | 上海理工大学 | A kind of suspension dynamic K&C testing stand unidirectionally loads the preparation method of spectrum |
| CN109115523A (en) * | 2018-10-10 | 2019-01-01 | 湖南湖大艾盛汽车技术开发有限公司 | A kind of stabilizer bar rating test and fatigue endurance test rack and test method |
| CN110069875A (en) * | 2019-04-28 | 2019-07-30 | 江铃汽车股份有限公司 | A kind of generation method of the load modal data of dynamic load emulation |
Non-Patent Citations (2)
| Title |
|---|
| 基于真实损伤的动力总成悬置系统路谱载荷缩减方法;刘雪莱;朱建明;杜小锦;;上海汽车(06);13-18 * |
| 基于等效损伤的动力总成悬置单轴实验载荷开发;阎礁;梅英豪;;上海汽车(10);44-48, 58 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112560162A (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112560162B (en) | Method and device for reducing suspended road spectrum load of power assembly | |
| CN112434367B (en) | Method and device for acquiring fatigue load spectrum of automotive suspension | |
| CN109813511B (en) | Bridge rapid test and parameter identification method based on mobile vehicle | |
| CN112685836A (en) | Method for evaluating fatigue degree of welding spot of car body, storage medium and equipment | |
| CN105808872A (en) | Vehicle suspension leaf spring frequency domain fatigue analysis method | |
| CN110119577A (en) | A method of extracting pure electric vehicle truck batteries bag bracket structure load spectrum | |
| CN110411757A (en) | Spindle nose dynamic load calculation method, device, equipment and storage medium | |
| CN105022887A (en) | Evaluation method and apparatus for reinforcing bracket of automobile | |
| CN109960877B (en) | Method and system for analyzing strength of automobile battery pack bracket | |
| CN1246704C (en) | Method for estimating residual capacity of storage battery for electric vehicle | |
| CN116029611A (en) | Comprehensive performance test and evaluation method for fuel cell hybrid power system | |
| CN113378421B (en) | Method for evaluating and predicting radial fatigue life of mechanical elastic wheel | |
| CN114329921A (en) | Method, device, equipment and medium for evaluating reliability performance of whole vehicle | |
| CN112763909B (en) | Vehicle driving motor combined working condition testing method and system | |
| Su | A road load data processing technique for durability optimization of automotive products | |
| CN101477008A (en) | Method for measuring wheel rigidity | |
| CN112861261A (en) | Vehicle body attachment point dynamic stiffness post-processing method and device and electronic equipment | |
| CN116449212A (en) | Rapid evaluation method and system for residual value of lithium ion battery of electric automobile | |
| CN111090959A (en) | Vehicle load spectrum acquisition method and system | |
| CN111506977A (en) | Power battery modeling method | |
| CN116341312A (en) | Split dynamic vibration response result evaluation method for engine | |
| van der Jagt | The road to virtual vehicle prototyping: New CAE models for accelerated vehicle dynamics development. | |
| CN113884264B (en) | Composite vibration and impact test method of thin film capacitor for electric automobile | |
| CN113155486A (en) | Durability simulation test method and system for power assembly suspension system | |
| JP6501049B1 (en) | Evaluation method and apparatus, and recording medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |