CN106897527B - Method and device for analyzing endurance load of vehicle suspension rack - Google Patents
Method and device for analyzing endurance load of vehicle suspension rack Download PDFInfo
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- CN106897527B CN106897527B CN201710117384.9A CN201710117384A CN106897527B CN 106897527 B CN106897527 B CN 106897527B CN 201710117384 A CN201710117384 A CN 201710117384A CN 106897527 B CN106897527 B CN 106897527B
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- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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Abstract
The invention provides a method and a device for analyzing the endurance load of a vehicle suspension rack, which receive a plurality of loading forces corresponding to a suspension rack model, wherein each loading force corresponds to a working condition; and carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions. The multiple loading forces corresponding to the suspension rack model are subjected to batch processing to obtain the endurance loads corresponding to the multiple working conditions, so that the endurance loads corresponding to the multiple working conditions are extracted simultaneously, and compared with the traditional method of extracting the endurance loads corresponding to the multiple working conditions, the time for extracting the endurance loads corresponding to the multiple working conditions is shortened.
Description
Technical Field
The invention relates to the technical field of Computer Aided Engineering (CAE), in particular to a method and a device for analyzing the endurance load of a vehicle suspension rack.
Background
The importance of the strength and durability of the automobile structural part is the first place and is the foundation stone with other performances no matter of passenger vehicles or commercial vehicles. From the viewpoint of the whole vehicle structure, the vehicle suspension rack is a foundation stone for supporting the whole vehicle to run, so the durability of the suspension rack is the most important. The CAE technology is widely used for carrying out finite element strength analysis on suspension structural parts for risk prediction and improvement. The main technical method comprises the steps of performing dynamic analysis on each working condition by establishing a suspension system model, extracting endurance load data of a concerned component in each working condition, and loading the load data to a finite element model of a structural member for fatigue endurance analysis. However, the current method needs to extract the endurance load data of the parts concerned by various working conditions in sequence, and the whole extraction process takes a long time.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for analyzing endurance load of a vehicle suspension rack, which aim to reduce the time for extracting endurance load corresponding to various operating conditions.
In order to achieve the above object, the following solutions are proposed:
a vehicle suspension rack endurance load analysis method comprising:
receiving a plurality of loading forces corresponding to a suspension rack model, each of the loading forces corresponding to a condition;
and carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions.
Preferably, before receiving a plurality of loading forces corresponding to the suspension gantry model, the method further comprises:
generating the suspension gantry model.
Preferably, the generating the suspension gantry model specifically includes:
and carrying out modal analysis on the suspension rack finite element network model to obtain the suspension rack model which is a flexible mathematical model.
Preferably, after obtaining the endurance load corresponding to each of the plurality of operating conditions, the method further includes:
and carrying out durability analysis on the suspension rack after loading the durable load, determining that the suspension rack model needs to be checked if the damage value is not in the preset damage value range, and determining that the suspension rack model does not need to be checked if the damage value is in the preset damage value range.
A vehicle suspension mount endurance load analyzing apparatus comprising:
the receiving unit is used for receiving a plurality of loading forces corresponding to the suspension rack model, and each loading force corresponds to one working condition;
and the batch processing unit is used for carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions.
Preferably, the apparatus further comprises:
a model generation unit for generating the suspension gantry model.
Preferably, the model generating unit is specifically configured to:
and carrying out modal analysis on the suspension rack finite element network model to obtain the suspension rack model which is a flexible mathematical model.
Preferably, the apparatus further comprises:
and the load inspection unit is used for carrying out durability analysis on the suspension rack after the durable load is loaded, determining that the suspension rack model needs to be inspected if the damage value is not in the preset damage value range, and determining that the suspension rack model does not need to be inspected if the damage value is in the preset damage value range.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the method and the device for analyzing the endurance load of the vehicle suspension rack, a plurality of loading forces corresponding to a suspension rack model are received, and each loading force corresponds to a working condition; and carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions. The multiple loading forces corresponding to the suspension rack model are subjected to batch processing to obtain the endurance loads corresponding to the multiple working conditions, so that the endurance loads corresponding to the multiple working conditions are extracted simultaneously, and compared with the traditional method of extracting the endurance loads corresponding to the multiple working conditions, the time for extracting the endurance loads corresponding to the multiple working conditions is shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for analyzing endurance load of a vehicle suspension mount according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for analyzing endurance load of a vehicle suspension mount according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for analyzing endurance load of a vehicle suspension mount according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an apparatus for analyzing endurance load of a vehicle suspension mount according to an embodiment of the present invention;
FIG. 5 is a schematic view of another vehicle suspension stand endurance load analysis apparatus provided in accordance with an embodiment of the present invention;
fig. 6 is a schematic view of another device for analyzing endurance load of a vehicle suspension mount according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides a method for analyzing the endurance load of a vehicle suspension rack, which is shown in fig. 1 and comprises the following steps:
step S11: receiving a plurality of loading forces corresponding to a suspension rack model, each of the loading forces corresponding to a condition;
a user can directly utilize a virtual suspension test stand tetrigg in ADAMS (Automatic Dynamic Analysis of mechanical systems, mechanical system dynamics Automatic Analysis), and set corresponding loading force of a suspension stand model according to different working conditions and the same setting as an actual physical experiment, wherein the loading force comprises the magnitude and the direction of the force, and the loading force is used as excitation. The force loaded according to different working conditions may include: the wheel center is loaded with a longitudinal force simulation drive which is equal to 0.5 time of the front axle load, the tire grounding point is loaded with a longitudinal force simulation brake which is equal to 0.6 time of the front axle load, the tire grounding point is loaded with a lateral force simulation road surface lateral force which is equal to 0.5 time of the front axle load during turning, and the wheel center is loaded with a vertical force simulation suspension compression force which is equal to 1.75 times of the front axle load.
Step S12: and carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions.
The received plurality of loading forces are processed in a batch format of ADAMS. The single data segment is used for controlling the on-off of the braking force, namely the actual braking force value of the braking force value is obtained under the braking working condition, and the braking force value is zero under the non-braking working condition. The method can realize the batch processing automatic solving calculation of the suspension rack model and obtain the endurance load corresponding to each of a plurality of working conditions. The endurance load analysis of the suspension rack is generally high in calculation speed, the solver setting in the ADAMS is generally set according to default values, and the default values are as follows: the solving type is dynamic, error 0.0001.
The embodiment provides a method for analyzing the endurance load of a vehicle suspension rack, which comprises the steps of receiving a plurality of loading forces corresponding to a suspension rack model, wherein each loading force corresponds to a working condition; and carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions. The durable loads corresponding to a plurality of working conditions are obtained by batch processing of a plurality of loading forces corresponding to the suspension rack model, so that the durable loads corresponding to the working conditions are extracted simultaneously, and compared with the traditional method of extracting the durable loads corresponding to the working conditions according to the sequence, the scheme of the invention reduces the time for extracting the durable loads corresponding to the working conditions
The present embodiment provides another method for analyzing endurance load of a vehicle suspension mount, referring to fig. 2, the method may include:
step S21: generating the suspension gantry model.
A CAD (Computer Aided Design) digital model of the suspension gantry was created by the tri-dimensional modeling software. Three-dimensional coordinates of the kinematic hinge points (known in the industry as hard points) of the suspension gantry can be obtained in a CAD digital-to-analog, and can be used to build a multi-body dynamic model of CAE (i.e., a suspension gantry model). For example, in a three-dimensional modeling software CATIA (computer graphics aided three-dimensional interactive application), a 'measuring' button is clicked, a cursor is moved to a ball head position outside a lower swing arm of a suspension, and a left button of a mouse is clicked, so that three-dimensional coordinates of a ball head center of the ball head can be displayed. The point generated by inputting the displayed three-dimensional coordinate values into the ADAMS is a kinematic joint point in the suspension gantry model. Of course, the three-dimensional coordinates of the moving hinge point can also be obtained through physical measurement, and the description is omitted here.
And the three-dimensional modeling software is respectively endowed with materials corresponding to parts such as a swing arm, a steering knuckle, a steering rod, a steering engine, a fixed frame and the like contained in a CAD digital model of the suspension rack. The mouse clicks the 'weight' button, and then the left click is made on the part to be tested, so that the mass and the coordinate position of the mass center of the part can be obtained. And inputting the mass centers and the masses of the components into ADAMS software, so as to establish a multi-body dynamic model of the corresponding components. Of course, the centroid and weight data can also be obtained by physical measurement, which is not described herein.
Preferably, the suspension rack finite element network model is subjected to modal analysis to obtain the suspension rack model which is a flexible mathematical model. And carrying out modal analysis on finite element mesh models of components such as an upper swing arm, a lower swing arm, a steering knuckle and a fixed frame included in the suspension rack to derive flexible mathematical models applied to the ADAMS such as the upper swing arm, the lower swing arm and the fixed frame. The flexible mathematical model can realize linear micro-deformation under stress, and avoids larger errors caused by distortion of the rigid body model in the simulation of the suspension rack.
Step S22: receiving a plurality of loading forces corresponding to a suspension rack model, each of the loading forces corresponding to a condition;
step S23: and carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions.
Step S22 and step S23 correspond to step S11 and step S12, respectively, and the description of the present embodiment is omitted.
The present embodiment provides another method for analyzing endurance load of vehicle suspension mount, referring to fig. 3, which may include
Step S31: receiving a plurality of loading forces corresponding to a suspension rack model, each of the loading forces corresponding to a condition;
step S32: and carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions.
Step S33: and carrying out durability analysis on the suspension rack after loading the durable load, determining that the suspension rack model needs to be checked if the damage value is not in the preset damage value range, and determining that the suspension rack model does not need to be checked if the damage value is in the preset damage value range.
For example, a component (such as a swing arm) finite element analysis is performed by selecting the peak load of the vertical loading working condition, and the damage value (strain cloud chart) of the component is obtained. And comparing the damage value in the simulation model with a preset damage value range, if the damage value is not in the preset damage value range, determining that the suspension rack model needs to be checked, and if the damage value is in the preset damage value range, determining that the suspension rack model does not need to be checked. The preset damage value range can be obtained through a real vehicle suspension rack test. In the built real vehicle suspension frame test, the positions of the patches are selected on the corresponding parts for carrying out the patches, and a certain working condition is simulated to obtain corresponding strain. Thereby obtaining a damage value range.
Step S31 and step S32 correspond to step S11 and step S12, respectively, and the description of the embodiment is omitted.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details which are not disclosed in the embodiments of the apparatus of the present invention, reference is made to the embodiments of the method of the present invention.
The present embodiment provides a vehicle suspension mount endurance load analyzing apparatus, which may include, referring to fig. 4:
the receiving unit 11 is used for receiving a plurality of loading forces corresponding to the suspension rack model, and each loading force corresponds to one working condition;
and the batch processing unit 12 is configured to perform batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions.
The embodiment provides a vehicle suspension rack endurance load analysis device, which comprises a receiving unit 11, a load analysis unit and a load analysis unit, wherein the receiving unit 11 is used for receiving a plurality of loading forces corresponding to a suspension rack model, and each loading force corresponds to a working condition; the batch processing unit 12 performs batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions. The multiple loading forces corresponding to the suspension rack model are subjected to batch processing to obtain the endurance loads corresponding to the multiple working conditions, so that the endurance loads corresponding to the multiple working conditions are extracted simultaneously, and compared with the traditional method of extracting the endurance loads corresponding to the multiple working conditions, the time for extracting the endurance loads corresponding to the multiple working conditions is shortened.
The present embodiment provides another vehicle suspension mount endurance load analyzing apparatus, which may include, referring to fig. 5:
a model generation unit 21 for generating the suspension gantry model. Preferably, the model generating unit 21 is specifically configured to perform modal analysis on the suspension gantry finite element network model to obtain the suspension gantry model which is a flexible mathematical model.
The receiving unit 22 is used for receiving a plurality of loading forces corresponding to the suspension rack model, and each loading force corresponds to one working condition;
and the batch processing unit 23 is configured to perform batch processing on the multiple loading forces to obtain the endurance loads corresponding to the multiple working conditions.
The present embodiment provides another vehicle suspension mount endurance load analyzing apparatus, which may include, referring to fig. 6:
a receiving unit 31, configured to receive multiple loading forces corresponding to a suspension gantry model, where each of the loading forces corresponds to a working condition;
and the batch processing unit 32 is configured to perform batch processing on the plurality of loading forces to obtain the endurance loads corresponding to the plurality of working conditions.
And the load checking unit 33 is used for performing durability analysis on the suspension rack after the durable load is loaded, determining that the suspension rack model needs to be checked if the damage value is not within the preset damage value range, and determining that the suspension rack model does not need to be checked if the damage value is within the preset damage value range.
The above-described apparatus embodiments are merely illustrative, wherein the units described as separate components may or may not be physically separate. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
In this document, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. 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 invention. Thus, the present invention 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 (4)
1. A vehicle suspension mount endurance load analysis method, comprising:
receiving a plurality of loading forces corresponding to a suspension rack model, each of the loading forces corresponding to a condition;
carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to a plurality of working conditions;
before the receiving a plurality of loading forces corresponding to the suspension gantry model, further comprising:
generating the suspension gantry model;
the generating of the suspension gantry model specifically includes:
carrying out modal analysis on the suspension rack finite element network model to obtain the suspension rack model which is a flexible mathematical model;
the modal analysis is carried out on the suspension rack finite element network model, and the suspension rack model which is a flexible mathematical model is obtained by the method comprising the following steps:
creating a CAD (computer-aided design) digital model of the suspension rack through three-dimensional modeling software;
acquiring a three-dimensional coordinate of a motion hinge point of the suspension rack in the CAD digital model;
inputting the three-dimensional coordinates of the motion hinge points into ADAMS software to generate motion joint points in the suspension rack model;
respectively endowing materials of each part contained in the CAD digital model through three-dimensional modeling software so as to obtain the mass and the centroid coordinate position of each part;
inputting the mass and the coordinate position of the mass center of each part into ADAMS software to generate a finite element network model of each part;
and carrying out modal analysis on the finite element network model of each component to obtain a flexible mathematical model of each component applied to ADAMS software.
2. The method of claim 1, further comprising, after obtaining the endurance load corresponding to each of the plurality of operating conditions:
and carrying out durability analysis on the suspension rack after loading the durable load, determining that the suspension rack model needs to be checked if the damage value is not in the preset damage value range, and determining that the suspension rack model does not need to be checked if the damage value is in the preset damage value range.
3. An apparatus for analyzing a durability load of a vehicle suspension mount, comprising:
the receiving unit is used for receiving a plurality of loading forces corresponding to the suspension rack model, and each loading force corresponds to one working condition;
the batch processing unit is used for carrying out batch processing on the plurality of loading forces to obtain the endurance loads corresponding to a plurality of working conditions;
the device, still include:
a model generation unit for generating the suspension gantry model;
the model generation unit is specifically configured to:
carrying out modal analysis on the suspension rack finite element network model to obtain the suspension rack model which is a flexible mathematical model;
the modal analysis is carried out on the suspension rack finite element network model, and the suspension rack model which is a flexible mathematical model is obtained by the method comprising the following steps:
creating a CAD (computer-aided design) digital model of the suspension rack through three-dimensional modeling software;
acquiring a three-dimensional coordinate of a motion hinge point of the suspension rack in the CAD digital model;
inputting the three-dimensional coordinates of the motion hinge points into ADAMS software to generate motion joint points in the suspension rack model;
respectively endowing materials of each part contained in the CAD digital model through three-dimensional modeling software so as to obtain the mass and the centroid coordinate position of each part;
inputting the mass and the coordinate position of the mass center of each part into ADAMS software to generate a finite element network model of each part;
and carrying out modal analysis on the finite element network model of each component to obtain a flexible mathematical model of each component applied to ADAMS software.
4. The apparatus of claim 3, further comprising:
and the load inspection unit is used for carrying out durability analysis on the suspension rack after the durable load is loaded, determining that the suspension rack model needs to be inspected if the damage value is not in the preset damage value range, and determining that the suspension rack model does not need to be inspected if the damage value is in the preset damage value range.
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| CN107505139A (en) * | 2017-08-25 | 2017-12-22 | 北京新能源汽车股份有限公司 | A kind of vehicle method for testing fatigue and device |
| CN109029884A (en) * | 2018-06-29 | 2018-12-18 | 江铃汽车股份有限公司 | A kind of method of vehicle cantilever structural member vibrating fatigue analysis |
| CN109033726B (en) * | 2018-09-19 | 2022-11-29 | 江铃汽车股份有限公司 | Finite element method-based chassis suspension system strength and rack durability analysis method |
| CN112100732A (en) * | 2019-05-30 | 2020-12-18 | 上海汽车集团股份有限公司 | Performance evaluation system of automobile chassis structural part |
| CN110362938B (en) * | 2019-07-19 | 2023-04-25 | 北京航天发射技术研究所 | ADAMS-based suspension load calculation method |
| CN112395727A (en) * | 2019-07-31 | 2021-02-23 | 比亚迪股份有限公司 | CAE-based vehicle endurance condition creating method and device |
| CN110895195B (en) * | 2019-12-31 | 2021-04-27 | 东风汽车集团有限公司 | Method for obtaining durability test load of front lower swing arm rack |
| CN111553025B (en) * | 2020-05-18 | 2022-07-05 | 江铃汽车股份有限公司 | Method for controlling gap section difference of automobile engine hood assembly |
| CN111797470A (en) * | 2020-06-24 | 2020-10-20 | 中国第一汽车股份有限公司 | Automobile quasi-static load decomposition method and system suitable for Internet |
| CN112182750B (en) * | 2020-09-23 | 2023-02-03 | 江铃汽车股份有限公司 | Fatigue endurance analysis preprocessing method, system, storage medium and equipment |
| CN113239581A (en) * | 2021-04-02 | 2021-08-10 | 陕西同力重工股份有限公司 | Method for analyzing strength of frame of off-highway dump truck |
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