CN112417588B - Vehicle structure design method and system - Google Patents
Vehicle structure design method and system Download PDFInfo
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- CN112417588B CN112417588B CN202011218230.7A CN202011218230A CN112417588B CN 112417588 B CN112417588 B CN 112417588B CN 202011218230 A CN202011218230 A CN 202011218230A CN 112417588 B CN112417588 B CN 112417588B
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- 238000013461 design Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000011156 evaluation Methods 0.000 claims abstract description 131
- 230000035945 sensitivity Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 11
- 230000008447 perception Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 description 23
- 239000006096 absorbing agent Substances 0.000 description 19
- 238000013016 damping Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001012 protector Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000012916 structural analysis Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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Abstract
The application relates to the technical field of vehicle structural design, and discloses a vehicle structural design method and system. The vehicle structural design method comprises the following steps: a1, comprehensively evaluating a vehicle part, generating a corresponding evaluation result, and selecting a protected part and one or more pre-protected parts corresponding to the protected part from the vehicle part according to the evaluation result; a2, sensing the running state of the vehicle, generating a corresponding sensing result, and determining the protection piece corresponding to the protected piece from all the pre-protection pieces according to the sensing result; and step A3, adjusting structural parameters of the protected piece according to the bearing performance of the protected piece and the protected piece. The technical scheme of the application has the beneficial effects that: the failure condition of the vehicle parts is optimized, the replacement and maintenance times of the vehicle parts are reduced, and the maintenance cost of the vehicle parts is reduced.
Description
Technical Field
The application relates to the technical field of vehicle structural design, in particular to a vehicle structural design method and system.
Background
When the vehicle runs, the load born by the vehicle part exceeds the maximum load strength of the part due to misoperation, and the deformation failure of the part is caused. Deformation failure of vehicle parts, frequent replacement, and the like, will lead to an increase in costs for the user.
In the prior art, the weakest part of the system is determined by a matrix method, and the weakest part is lifted, so that the maintenance cost is reduced, the failure sequence of parts is not reasonably optimized from the angles of a protection part and a protected part, and the parts of the vehicle are in unordered failure modes, so that the maintenance cost of the vehicle is increased.
Disclosure of Invention
Aiming at the problems in the prior art, the application provides a vehicle structure design method and a vehicle structure design system.
The vehicle structural design method comprises the following steps:
a1, comprehensively evaluating a vehicle part, generating a corresponding evaluation result, and selecting a protected part and one or more pre-protection parts corresponding to the protected part from the vehicle part according to the evaluation result;
a2, sensing the running state of the vehicle, generating a corresponding sensing result, and selecting a protection piece corresponding to the protected piece from all pre-protection pieces according to the sensing result;
and step A3, adjusting structural parameters of the protected piece according to the bearing performance of the protected piece and the protected piece.
Preferably, the step A1 includes:
step A11, performing failure evaluation on the vehicle part, and selecting the protected piece from the vehicle part according to a failure evaluation result;
step a12 of performing sensitivity evaluation on the vehicle parts associated with the protected pieces, and selecting one or more pre-protection pieces corresponding to the protected pieces from the vehicle parts associated with the protected pieces according to the sensitivity evaluation result.
Preferably, the failure evaluation includes cost evaluation, performance evaluation, and structure evaluation.
Preferably, the method of sensing the running state of the vehicle includes:
identifying image data acquired by an image module when the vehicle runs; and/or
Acquiring a detection result acquired by a sensing module when the vehicle runs; and/or
And acquiring sound acquired by the sound module when the vehicle runs.
Preferably, the detection result includes:
the speed of the left and right wheels when the vehicle is running; and/or
A travel route of the vehicle when running; and/or
The heights of left and right wheels when the vehicle runs; and/or
Jitter conditions when the vehicle is running.
Preferably, the step A3 includes:
step A31, obtaining a first bearing performance of the protected piece;
step A32, obtaining a second bearing performance of the protection piece;
and step A33, adjusting structural parameters of the protection piece according to the first bearing performance and the second bearing performance.
Preferably, the first bearing performance includes a normal bearing performance and an unconventional bearing performance of the protected piece, and the second bearing performance includes a normal bearing performance and an unconventional bearing performance of the protected piece;
in the step a33, the upper limit of the structural parameter of the protection member is adjusted according to the lower limit of the unconventional load-bearing performance of the protected member, and the lower limit of the structural parameter of the protection member is adjusted according to the upper limit of the conventional load-bearing performance of the protection member.
A vehicle structural design system, comprising:
the comprehensive evaluation module is used for comprehensively evaluating the vehicle part and generating a corresponding evaluation result, and selecting a protected part and one or more pre-protected parts corresponding to the protected part from the vehicle part according to the evaluation result;
the sensing module is connected with the comprehensive evaluation module and is used for sensing the running state of the vehicle and generating a corresponding sensing result, and determining the protection piece corresponding to the protected piece from all the pre-protection pieces according to the sensing result;
and the adjusting module is connected with the comprehensive evaluation module and the sensing module and is used for adjusting the structural parameters of the protected piece according to the bearing performance of the protected piece and the protected piece.
Preferably, the comprehensive evaluation module includes:
the first evaluation unit is used for performing failure evaluation on the vehicle part and selecting the protected part from the vehicle part according to a failure evaluation result;
and the second evaluation unit is connected with the first evaluation unit and is used for performing sensitivity evaluation on the vehicle parts related to the protected parts and selecting one or more pre-protection parts corresponding to the protected parts from the vehicle parts related to the protected parts according to the sensitivity evaluation result.
Preferably, the first evaluation unit includes:
a cost evaluation unit for performing cost evaluation on the vehicle part and generating a cost evaluation result;
a performance evaluation unit for performing performance evaluation on the vehicle part and generating a performance evaluation result;
and the structure evaluation component is used for carrying out structure evaluation on the vehicle part and generating a structure evaluation result.
Preferably, the sensing module includes:
the first sensing unit is used for identifying image data acquired by the image module when the vehicle runs; and/or
The second sensing unit is used for acquiring a detection result acquired by the sensing module when the vehicle runs; and/or
And the third perception unit is used for acquiring the sound acquired by the sound module when the vehicle runs.
Preferably, the second sensing unit includes a first acquiring means for acquiring speeds of left and right wheels when the vehicle is running; and/or
The second sensing unit comprises a second acquisition component for acquiring a driving route of the vehicle during running; and/or
The second sensing unit comprises a third acquisition component for acquiring the heights of left and right wheels when the vehicle runs; and/or
The second sensing unit comprises a fourth acquisition component for acquiring the jitter condition of the vehicle during running.
Preferably, the adjusting module includes:
the first adjusting unit is used for acquiring the first bearing performance of the protected piece;
the second adjusting unit is used for acquiring a second bearing performance of the protection piece;
and the third adjusting unit is connected with the first adjusting unit and the second adjusting unit and is used for adjusting the structural parameters of the protection piece according to the first bearing performance and the second bearing performance.
Preferably, the first bearing performance includes a normal bearing performance and an unconventional bearing performance of the protected piece, and the second bearing performance includes a normal bearing performance and an unconventional bearing performance of the protected piece;
the third adjusting unit comprises:
and the adjusting component is used for adjusting the upper limit of the structural parameter of the protecting piece according to the lower limit of the unconventional bearing performance of the protected piece and adjusting the lower limit of the structural parameter of the protecting piece according to the upper limit of the conventional bearing performance of the protecting piece.
The technical scheme has the following advantages or beneficial effects: the failure condition of the vehicle parts is optimized, the replacement and maintenance times of the vehicle parts are reduced, and the maintenance cost of the vehicle parts is reduced.
Drawings
FIG. 1 is a flow chart of a vehicle structural design method according to a preferred embodiment of the application;
FIG. 2 is a schematic flow chart of step A1 in a vehicle structural design method according to a preferred embodiment of the present application;
FIG. 3 is a schematic flow chart of step A3 in the vehicle structural design method according to the preferred embodiment of the present application;
FIG. 4 is a schematic view of the overall structure of the vehicle structural design system according to the preferred embodiment of the present application;
FIG. 5 is a schematic diagram of a comprehensive evaluation module in a vehicle structural design system according to a preferred embodiment of the present application;
FIG. 6 is a schematic diagram of a first evaluation unit in the integrated evaluation module according to the preferred embodiment of the present application;
FIG. 7 is a schematic diagram of a sensing module in a vehicle structural design system according to a preferred embodiment of the present application;
FIG. 8 is a schematic diagram of a second sensing unit in the sensing module according to the preferred embodiment of the present application;
FIG. 9 is a schematic diagram of an adjustment module in a vehicle structural design system according to a preferred embodiment of the present application;
FIG. 10A is a schematic view of the overall structure of a prior art chassis load arm;
FIG. 10B is a front view of a prior art chassis load arm;
FIG. 10C is a top view of a prior art chassis load arm;
FIG. 11 is a graph showing the relationship between vertical load and deformation strain of a shock tower according to the preferred embodiment of the present application;
FIG. 12 is a schematic view of the vertical loads experienced by the shock tower and chassis load arm under different conditions in accordance with the preferred embodiment of the present application;
FIG. 13A is a schematic view of the overall structure of the chassis load arm after adjusting the structural parameters according to the preferred embodiment of the present application;
FIG. 13B is a front view of the chassis load arm after adjusting the structural parameters in accordance with the preferred embodiment of the present application;
fig. 13C is a top view of the chassis load arm after adjusting the structural parameters in accordance with the preferred embodiment of the present application.
Detailed Description
The application will be described in detail below with reference to the drawings and the detailed description. The present application is not limited to the embodiment, and other embodiments may fall within the scope of the present application as long as they conform to the gist of the present application.
The application aims to solve the problem that the self performance of the protecting piece and the coordination relation between the protecting piece and the corresponding protected piece cannot be considered in the prior art, and the failure condition of the vehicle part is adjusted by optimizing the structure of the vehicle part, so that the maintenance cost of the vehicle part is reduced, and the protecting piece can play an effective role in protection.
The following specific technical means are provided as examples for realizing the gist of the present application, and it is understood that the following embodiments, and technical features in the embodiments, may be combined with each other without conflict. And, the protection scope of the present application should not be limited by the embodiments for explaining the feasibility of the present application.
In accordance with the foregoing problems with the prior art, the present application provides, in a preferred embodiment, a vehicle structural design system and method. Wherein, include:
a vehicle structural design method, as shown in fig. 1, includes the steps of:
a1, comprehensively evaluating the vehicle part, generating a corresponding evaluation result, and selecting a protected part and one or more pre-protection parts corresponding to the protected part from the vehicle part according to the evaluation result;
a2, sensing the running state of the vehicle, generating a corresponding sensing result, and determining the protection piece corresponding to the protected piece from all the pre-protection pieces according to the sensing result;
and step A3, adjusting structural parameters of the protecting piece according to the bearing performance of the protected piece and the protecting piece.
Specifically, the application provides a vehicle structural design method, through steps A1-A3, one or more pre-protection parts corresponding to protected parts are selected from vehicle parts, then the optimal pre-protection parts are selected from the pre-protection parts to serve as protection parts, and structural parameters of the protection parts are adjusted. The vehicle structural design is carried out based on the structural parameters of the regulated protection piece, so that the failure condition of the vehicle part can be optimized, the replacement and maintenance times of the vehicle part are reduced, the maintenance cost of the vehicle part is reduced, and the protection piece can play an effective protection role.
In a preferred embodiment of the present application, as shown in fig. 2, step A1 includes:
step A11, performing failure evaluation on the vehicle part, and selecting a protected part from the vehicle part according to a failure evaluation result;
and step A12, performing sensitivity evaluation on the vehicle parts related to the protected parts according to the load requirements of the protected parts under a plurality of different vehicle conditions, and selecting one or more pre-protection parts corresponding to the protected parts from the vehicle parts related to the protected parts according to the sensitivity evaluation result.
Specifically, failure and sensitivity evaluations are performed on vehicle parts under a plurality of different vehicle conditions, and protected parts and one or more pre-protection parts corresponding to the protected parts in the vehicle parts are determined.
In the preferred embodiment, the process of performing sensitivity evaluation may be to sequentially transform structural parameters of the vehicle part corresponding to the protected piece to obtain sequentially corresponding load conditions of the protected piece, sequentially analyze a change condition between the load condition of the protected piece and an original load condition of the protected piece, and select a corresponding pre-protection piece according to the change condition. Specifically, structural analysis is performed on a protected piece determined in vehicle parts, if three different vehicle parts are connected with the protected piece, three load conditions of the protected piece can be obtained by sequentially changing structural parameters of the three vehicle parts, difference analysis is performed on the three load conditions and original load conditions of the protected piece, and the corresponding vehicle part with obvious load condition change difference can be used as a pre-protection piece of the protected piece. The pre-protection piece corresponding to the protected piece is selected from all the vehicle parts corresponding to the protected piece, so that the protection piece corresponding to the protected piece can be more accurately determined.
In a preferred embodiment of the present application, the failure assessment includes cost assessment, performance assessment, and structural assessment.
As a preferred embodiment, in the cost evaluation of the vehicle part, the economic cost of the vehicle part may be obtained as a result of the cost evaluation according to the brand type of the vehicle part.
In a preferred embodiment, when the performance of the vehicle part is evaluated, the load-bearing performance of the vehicle part can be obtained according to the current vehicle condition of the vehicle and used as a performance evaluation result.
In the preferred embodiment, when the structural evaluation is performed on the vehicle part, the influence degree of the vehicle part can be obtained according to the structural relation between the vehicle part and other parts and used as the structural evaluation result. The degree of influence may include, among other things, the number of other vehicle parts that the vehicle part affects, as well as the degree of association with other vehicle parts.
Specifically, the cost evaluation result and the performance evaluation result may be analyzed in general, a vehicle part having a higher economic cost and a lower limit of the load bearing performance may be selected as the protected member, if the protection member may be determined in combination with the structural evaluation when the vehicle part having a higher economic cost and a lower limit of the load bearing performance has a plurality of vehicle parts, that is, the cost evaluation and the performance evaluation are performed for the vehicle parts a1, a2, a3, a4 and a5, and when the vehicle part having a higher economic cost and a lower limit of the load bearing performance has a1 and a2, and when the economic cost of the two is higher and the lower limit of the load bearing performance does not differ much, the structural analysis may be performed for the vehicle parts a1 and a2, and it is found that the vehicle part a1 has close relationship with the vehicle parts b, c and d, the vehicle part a2 may affect only the vehicle part b, and thus the a1 may be selected as the protection member.
As a preferred embodiment, the method for sensing the running state of the vehicle may include identifying image data collected by an image module while the vehicle is running. Specifically, the image module can be arranged on the vehicle body to collect the surrounding images of the vehicle during running, and the collected surrounding images are analyzed to determine the running state of the vehicle; and/or the image module can be arranged in the vehicle, the acquisition direction of the image module is kept consistent with the advancing direction of the vehicle, and the acquired images in the advancing direction are analyzed to determine the running state of the vehicle; and/or the image module can be arranged outside the vehicle, such as on a plurality of areas with known road conditions in a special test site, and image data of the known road conditions during the running of the vehicle is collected, and the image data and the corresponding road conditions are subjected to matching processing to determine the running state of the vehicle.
As a preferred embodiment, the method for sensing the running state of the vehicle may include acquiring a detection result acquired by a sensing module when the vehicle runs. Specifically, the actual running states of the vehicle on the various parts can be collected through the sensing module to determine the running state of the vehicle.
As a preferred embodiment, the method of sensing the running state of the vehicle may include acquiring sound collected by a sound module while the vehicle is running. In particular, the sound module may be provided on different vehicle parts to determine the vehicle running state by sound when the different vehicle parts are running; and/or the sound module can be arranged outside the vehicle, such as on a plurality of areas with known road conditions in a special test site, and collect the sound of the vehicle running in the known road conditions, and the sound is matched with the corresponding road conditions to determine the running state of the vehicle.
In the method for sensing the running state of the vehicle according to the preferred embodiment, the image module and the sound module may be further disposed on a plurality of areas of known road conditions of the dedicated test site, and the image data and the sound of the vehicle in the known road conditions may be collected during running, and the image data and the sound may be matched with the corresponding road conditions to determine the running state of the vehicle.
Specifically, as described above, in the process of acquiring the actual running states of the vehicle in each part through the sensor module to determine the running state of the vehicle:
as an alternative embodiment, the sensing module may be disposed on left and right wheels of the vehicle, collect speeds of the left and right wheels when the vehicle is running, and use the speeds of the left and right wheels as a detection result.
As an alternative embodiment, the sensor module may be disposed on left and right wheels of the vehicle, collect a driving route of the vehicle when the vehicle is running, and use the driving route as a detection result.
As an alternative embodiment, the sensing module may be disposed on left and right wheels of the vehicle, collect heights of the left and right wheels when the vehicle is running, and use the heights of the left and right wheels as a detection result.
As an alternative implementation manner, the sensing module can be arranged on wheels, a steering wheel and a seat of the vehicle, and the shaking condition of the vehicle during running is collected and used as a detection result.
The protected part and one or more pre-protection parts corresponding to the protected part can be selected from the vehicle parts through comprehensive evaluation in the step A1, then the running state of the vehicle can be sensed through the step A2, the protected part corresponding to the protected part is selected from the pre-protection parts according to the sensing result, namely, when the pre-protection parts are adopted for structural design, whether the sensing result is unique is judged, if so, the pre-protection parts can be used as the protected parts, and if not, the protected parts cannot be used as the protected parts.
Specifically, step A1 performs failure evaluation on vehicle parts, and may select a vehicle body damper tower with higher economic cost and lower limit of bearing performance as a protection member, and then sequentially performs sensitivity evaluation on vehicle parts disposed in association with the vehicle body damper tower, and may select a damper bracket and a chassis bearing arm capable of improving the load condition of the vehicle body damper tower as a pre-protection member. Then in step A2, when the vehicle is controlled to travel to a preset road condition or encounters a preset condition, the traveling state of the vehicle is perceived and a perception result is generated in the manner, when the shock absorber support is selected as a protection piece of the vehicle body shock absorber tower, the vehicle encounters impact, the perception result corresponding to the bending failure of the shock absorber support is only the change of the height difference of the left wheel and the right wheel of the vehicle, the traveling square pit of the vehicle is also the change of the height difference of the left wheel and the right wheel of the vehicle, and therefore, when the shock absorber support is used as the protection piece, the traveling state of the shock absorber support cannot be directly judged through the perception result; when the chassis bearing arm is selected as a protection piece of the vehicle body shock absorption tower, the vehicle is impacted, the sensing result corresponding to the bending failure of the chassis bearing arm is that the height difference of the left and right wheels of the vehicle is changed, the wheel speed difference of the left and right wheels is changed, the running linear stability is changed and the like, the vehicle runs in a square pit, the sensing result corresponding to the normal state of the chassis bearing arm is that the height difference of the left and right wheels of the vehicle is changed, and when the chassis bearing arm is used as the protection piece, the failure of the chassis bearing arm can be directly judged through the sensing result, so that the chassis bearing arm can be used as the protection piece corresponding to the vehicle body shock absorption tower. It can be seen that the protection element can be accurately selected from the plurality of pre-protection elements by the step A2, so as to protect the vehicle parts with higher economic cost and low bearing performance lower limit.
In a preferred embodiment of the present application, as shown in fig. 3, step A3 includes:
step A31, obtaining a first bearing performance of a protected piece;
step A32, obtaining a second bearing performance of the protection piece;
and step A33, adjusting structural parameters of the protection piece according to the first bearing performance and the second bearing performance.
Specifically, in step A3, in order to improve the overall structural performance and enable the protected member and the corresponding protecting member to operate more cooperatively, structural parameters of the protecting member may be adjusted according to the first bearing performance and the second bearing performance.
As a preferred embodiment, the first load bearing performance may be classified into a main performance parameter and a non-main performance parameter according to the structural parameter of the protected component, and the main performance parameter may be replaced by the first load bearing performance, so as to adjust the structural parameter of the protected component corresponding to the protected component. Specifically, the first load bearing performance of the protected member determined in the vehicle part may include a plurality of different types of performance parameters, for example, when the protected member is a vehicle body damper tower, the corresponding performance parameters may include stiffness, permanent deformation and plastic strain, and the structural parameters of the protected member corresponding to the vehicle body damper tower are adjusted to analyze the change condition of the first load bearing performance of the vehicle body damper tower, so that at least one of the performance parameters may be closely related to the structural parameters of the protected member, and therefore, the closely related performance parameter may be used as a main performance parameter, and here, the plastic strain may be used as a main performance parameter, and the remaining performance parameter may be used as a non-main performance parameter, and the main performance parameter may be replaced as the structural parameter of the first load bearing performance adjustment protection member, so that the data processing amount of the performance parameter may be reduced, thereby facilitating rapid and efficient adjustment of the structural parameters of the protected member.
In a preferred embodiment of the present application, the first load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member, and the second load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member;
in step a33, the upper limit of the structural parameter of the protection member is adjusted according to the lower limit of the unconventional load-bearing performance of the protected member, and the lower limit of the structural parameter of the protection member is adjusted according to the upper limit of the conventional load-bearing performance of the protection member.
As a preferred embodiment, the first load bearing performance of the protected member may be divided according to the operation state of the protected member to obtain a normal load bearing performance and an abnormal load bearing performance of the protected member, where the normal load bearing performance is a load bearing performance corresponding to the protected member in a normal operation state, and the abnormal load bearing performance is a load bearing performance corresponding to the protected member in an abnormal operation state. Specifically, the normal running state of a protected piece is an extended state, the load bearing performance of the protected piece can be analyzed, when the protected piece is in the extended state, the corresponding load bearing performance is divided into conventional load bearing performance, and when the protected piece cannot keep the extended state, such as a bending state, the corresponding load bearing performance is divided into unconventional load bearing performance. By judging the normal bearing performance and the abnormal bearing performance in the bearing performance through the running state of the protected piece, the phenomenon that the same protected pieces have differences in bearing performance among the protected pieces due to factors such as process errors of the protected pieces can be fully considered, and therefore the structural parameters of the protected pieces can be adjusted more accurately.
As a preferred embodiment, the second load bearing performance of the protection member may be divided according to the running requirement of the vehicle to obtain the normal load bearing performance and the non-normal load bearing performance of the protection member, where the upper limit of the normal load bearing performance of the protection member is also the structural parameter of the protection member corresponding to the situation that the vehicle meets the running requirement, specifically, if the protection member is a chassis load bearing arm, the running requirement is 10 ten thousand kilometers in 5 years, and the upper limit of the normal load bearing performance at this time is that the permanent deformation amount of the chassis load bearing arm is less than the permanent deformation threshold, the plastic strain is less than the strain threshold, and the shortest service life of the chassis load bearing arm is greater than the service life threshold.
As a preferred embodiment, the upper limit of the structural parameter of the protector may be adjusted according to the lower limit of the irregular load-bearing performance of the protected member, and the lower limit of the structural parameter of the protector may be adjusted according to the upper limit of the regular load-bearing performance of the protector, and the structural parameter may include the length, width, thickness, structural shape of the protector, and the positional relationship, connection form, etc. with the corresponding protected member. Through adjusting the structural parameter of protection piece, can reduce the load that receives by the protection piece when satisfying the operation demand to play the protection by the protection piece, maintain the steady operation's of vehicle effect.
A vehicle structural design system, as shown in fig. 4, comprising:
the comprehensive evaluation module 1 is used for comprehensively evaluating the vehicle part and generating a corresponding evaluation result, and selecting a protected part and one or more pre-protected parts corresponding to the protected part from the vehicle part according to the evaluation result;
the sensing module 2 is connected with the comprehensive evaluation module 1 and is used for sensing the running state of the vehicle, generating a corresponding sensing result and determining the protection piece corresponding to the protected piece from all the pre-protection pieces according to the sensing result;
and the adjusting module 3 is connected with the comprehensive evaluation module 1 and the sensing module 2 and is used for adjusting the structural parameters of the protected piece according to the bearing performance of the protected piece and the protected piece.
Specifically, a vehicle structural design system is provided, a comprehensive evaluation module 1, a sensing module 2 and an adjusting module 3 are arranged in the vehicle structural design system, the comprehensive evaluation module 1 is used for comprehensively evaluating vehicle parts, a protected part and one or more pre-protection parts corresponding to the protected part are selected from the vehicle parts, the sensing module 2 is used for sensing the running state of the vehicle to obtain sensing results under different running states, the corresponding protection parts are selected from the pre-protection parts, and the adjusting module 3 is used for adjusting structural parameters of the protection parts, so that the protection parts can play an effective role in protection.
In a preferred embodiment of the present application, as shown in fig. 5, the comprehensive evaluation module 1 includes:
a first evaluation unit 11 for performing failure evaluation on the vehicle part, and selecting a protected part from the vehicle part according to the failure evaluation result;
a second evaluation unit 12 connected to the first evaluation unit 11 for performing sensitivity evaluation on the vehicle parts associated with the protected member according to the load demands of the protected member under a plurality of different vehicle conditions, and selecting one or more pre-protection members corresponding to the protected member from the vehicle parts associated with the protected member according to the sensitivity evaluation result.
Specifically, the first evaluation unit 11 and the second evaluation unit 12 perform failure evaluation and sensitivity evaluation on the vehicle parts, and the protected parts and the protection parts corresponding to the protected parts in the vehicle parts are determined.
In a preferred embodiment of the present application, as shown in fig. 6, the first evaluation unit 11 includes:
a cost evaluation section 111 for performing cost evaluation on the vehicle parts and generating a cost evaluation result;
a performance evaluation unit 112 for performing performance evaluation on the vehicle parts and generating performance evaluation results;
a structure evaluation part 113 for performing structure evaluation on the vehicle part and generating a structure evaluation result.
As an alternative embodiment, the cost evaluation unit 111 performs cost evaluation on the vehicle part, the performance evaluation unit 112 performs performance evaluation on the vehicle part, and the structure evaluation unit 113 may perform structure evaluation on the vehicle part, and determine the protected piece in the vehicle part according to the cost evaluation result, the performance evaluation result, and the structure analysis result together.
As a preferred embodiment, as shown in fig. 7, the sensing module 2 may include a first sensing unit 21. Specifically, the first sensing unit 21 may be an identification device disposed on the vehicle body to collect images around the vehicle during running; and/or the first sensing unit 21 may be an identification device provided in the vehicle and having a collection direction consistent with the advancing direction of the vehicle; and/or, the first sensing unit 21 may be an identification device disposed outside the vehicle, for example, on a plurality of areas with known road conditions in a dedicated test site, and configured to collect image data of the vehicle running in the known road conditions, and the first sensing unit 21 may perform matching processing on the image data and the corresponding road conditions to determine the running state of the vehicle.
As a preferred embodiment, as shown in fig. 7, the sensing module 2 may include a second sensing unit 22. Specifically, the second sensing unit 22 may be a sensing module provided on the vehicle to detect actual operating states of the respective parts.
As a preferred embodiment, as shown in fig. 7, the sensing module 2 may include a third sensing unit 23. Specifically, the third sensing unit 23 may be a sound module disposed on a different vehicle part and used for collecting sounds generated when the vehicle runs through the different vehicle part, and/or the third sensing unit 23 may be a sound module disposed outside the vehicle, such as on a plurality of areas with known road conditions in a dedicated test site, and used for collecting sounds generated when the vehicle runs on the known road conditions, and the third sensing unit 23 may perform a matching process on the collected sounds and the corresponding road conditions to determine the running state of the vehicle.
As a preferred embodiment, the sensing module 2 may further include a second sensing unit 22 and a third sensing unit 23. The method is used for collecting image data and sound during the running of the vehicle in the known road conditions on a plurality of areas of known vehicle conditions of a special test site so as to determine the running state of the vehicle.
As an alternative embodiment, as shown in fig. 8, the second sensing unit 22 may include a first acquiring part 221 for acquiring the speeds of left and right wheels when the vehicle is running.
As an alternative embodiment, as shown in fig. 8, a second acquisition part 222 that acquires a travel route when the vehicle is running may be included in the second sensing unit 22.
As an alternative embodiment, as shown in fig. 8, a third acquiring part 223 may be included in the second sensing unit 22 to acquire the heights of the left and right wheels when the vehicle is running.
As an alternative embodiment, as shown in fig. 8, the second sensing unit 22 may include a fourth acquiring unit 224 for acquiring a shake condition when the vehicle is running.
In a preferred embodiment of the present application, as shown in fig. 9, the adjustment module 3 includes:
a first adjusting unit 31, configured to obtain a first load-bearing performance of the protected member;
a second adjusting unit 32, configured to obtain a second load-bearing performance of the protection member;
the third adjusting unit 33 is connected to the first adjusting unit 31 and the second adjusting unit 32, and is configured to adjust structural parameters of the protection member according to the first bearing performance and the second bearing performance.
Specifically, to improve the overall structural performance and enable a more coordinated operation between the protected piece and the corresponding protection piece, the third adjusting unit 33 may adjust the structural parameters of the protection piece according to the first bearing performance and the second bearing performance obtained by the first adjusting unit 31 and the second adjusting unit 32.
In a preferred embodiment of the present application, the first load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member, and the second load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member;
the second adjusting unit 32 may include an adjusting component for adjusting an upper limit of a structural parameter of the protection member according to a lower limit of an irregular load-bearing performance of the protected member, and adjusting a lower limit of the structural parameter of the protection member according to the upper limit of the regular load-bearing performance of the protection member.
Specifically, in order to improve the protection effect of the protection element on the protected element, the adjusting component can adjust the structural parameters of the protection element according to the bearing performance.
Examples
The present embodiment is a specific application embodiment of a specific implementation manner of acquiring and adjusting structural parameters of a protection member when a certain vehicle is structurally designed.
In this embodiment, for the suspension system of the vehicle, first, in step A1, the vehicle part with higher cost and lower bearing performance limit may be obtained through failure evaluation as the vehicle body damper tower, so the vehicle body damper tower is used as the protected part, then the sensitivity evaluation is performed on the vehicle part associated with the vehicle body damper tower, the structural parameters of the vehicle part corresponding to the vehicle body damper tower are sequentially transformed, and meanwhile, the load change condition of the vehicle body damper tower is analyzed, so that when the structural parameters of the damper bracket and the chassis bearing arm are changed, the change of the load condition of the vehicle body damper tower is obvious, and therefore, the damper bracket and the chassis bearing arm are selected as the pre-protecting part.
Then, in step A2, when the vehicle is controlled to travel to a preset road condition or encounters a preset condition, the traveling state of the vehicle is perceived and a perceived result is generated, when the shock absorber support is selected as a protection piece of the vehicle body shock absorber tower, the vehicle encounters impact, the perceived result corresponding to the bending failure of the shock absorber support is only the change of the height difference of the left and right wheels of the vehicle, the traveling square pit of the vehicle and the perceived result corresponding to the normal state of the shock absorber support is also the change of the height difference of the left and right wheels of the vehicle, so that the traveling state of the shock absorber support cannot be directly judged through the perceived result when the shock absorber support is used as the protection piece; when the chassis bearing arm is selected as a protection piece of the vehicle body shock absorber tower, the vehicle is impacted, the sensing result corresponding to the bending failure of the chassis bearing arm is that the height difference of the left wheel and the right wheel of the vehicle is changed, the wheel speed difference of the right wheel is changed, the linear stability of the vehicle is changed and the like, the vehicle runs in a square pit, the sensing result corresponding to the normal state of the chassis bearing arm is that the height difference of the left wheel and the right wheel of the vehicle is changed, and therefore, when the chassis bearing arm is used as the protection piece, whether the chassis bearing arm fails or not can be directly judged through the sensing result, and therefore, the chassis bearing arm is selected from the shock absorber bracket and the pre-protection piece of the chassis bearing arm to be used as the protection piece corresponding to the vehicle body shock absorber tower.
Finally, in step A3, structural parameters of the chassis load-carrying arm are adjusted, specifically, main performance parameters corresponding to the vehicle body shock-absorbing tower can be obtained in advance through the structural parameters of the vehicle body shock-absorbing tower, the main performance parameters are used as first load-carrying performance, normal load-carrying performance and unconventional load-carrying performance in the first load-carrying performance are divided through analyzing the running state of the vehicle body shock-absorbing tower, then the second load-carrying performance of the chassis load-carrying arm is divided through the running requirement of the vehicle, normal load-carrying performance and unconventional load-carrying performance in the second load-carrying performance are obtained, the upper limit of the structural parameters of the chassis load-carrying arm is adjusted according to the lower limit of the unconventional load-carrying performance of the vehicle body shock-absorbing tower, and the lower limit of the structural parameters of the chassis load-carrying arm is adjusted according to the upper limit of the normal load-carrying performance of the chassis load-carrying arm.
The automobile body shock absorber tower is as protected piece, and the chassis bearing arm that corresponds is the protection piece. The initial state, unadjusted chassis carrying arm is shown in fig. 10A-10C.
The main performance parameters corresponding to the vehicle body damping tower are obtained through the structural parameters of the vehicle body damping tower, the main performance parameters are used as first bearing performance, and the shaping strain under the vertical bearing load can be used as the first bearing performance of the vehicle body damping tower. Accordingly, the conventional bearing performance and the unconventional bearing performance in the first bearing performance are divided according to the running state of the vehicle body damping tower, as shown in fig. 11, the conventional bearing performance of the vehicle body damping tower is an M1 section, the vertical load born by the vehicle body damping tower at the moment is in a bearable range, the shaping strain is smaller, the unconventional bearing performance is an M2 section, the vertical load born by the vehicle body damping tower at the moment exceeds the bearable range, the shaping strain is larger, specifically, the lower limit of the unconventional bearing performance of the vehicle body damping tower is 63.2 (KN), and then the upper limit and the lower limit of the conventional bearing performance N1 and the unconventional bearing performance N2 of the chassis bearing arm are analyzed according to the first bearing performance of the vehicle body damping tower, as shown in fig. 12, and the upper limit of the vertical bearing load corresponding to the conventional bearing performance of the chassis bearing arm is 54 (KN); the lower limit of the vertical load corresponding to the unconventional load carrying performance of the chassis load carrying arm is 61.6 (KN), so that the structural parameters of the chassis load carrying arm can be adjusted according to the upper limit (54 KN) of the conventional load carrying performance of the chassis load carrying arm and the lower limit (63.2 KN) of the unconventional load carrying performance of the vehicle body damping tower, and the adjusted chassis load carrying arm specifically adjusts the thickness between A, B points in the chassis load carrying arm and the position of the cross section defined by A, B points between C, D points as shown in fig. 13A-13C.
In addition, in order to determine the protection effect of the chassis bearing arm on the corresponding vehicle body damping tower at the moment, the load condition of the vehicle body damping tower at the moment can be analyzed, and the protection effect is determined by comparing the previous load condition with the current load condition. Specifically, when a vehicle encounters a pothole vehicle condition, the protective effect of the chassis bearing arm on the vehicle body shock absorber is as shown in table 1 below:
TABLE 1
As shown in table 1, as the running speed increases, the load that the vehicle body shock absorber receives is greater, and the chassis load arm protects the vehicle body shock absorber as a protection member, so that deformation failure occurs, the load that the vehicle body shock absorber receives can be reduced, thereby playing a role in protecting vehicle parts and maintaining the vehicle to run stably.
Correspondingly, the state of the chassis bearing arm at the moment can be judged by sensing the running state of the vehicle. The sensing module senses the speed of the left wheel and the right wheel, the running route, the height of the left wheel and the right wheel and the shaking condition when the vehicle runs, and judges that the difference between the speeds of the left wheel and the right wheel exceeds a speed difference threshold value, the difference between the running route and the linear direction exceeds a direction difference threshold value, the difference between the heights of the left wheel and the right wheel exceeds a height difference threshold value and the steering wheel shakes, and judges that the chassis bearing arm fails.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the embodiments and the protection scope of the present application, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations made by the present description and the illustrated embodiments should be included in the protection scope of the present application.
Claims (12)
1. A vehicle structural design method, characterized by comprising the steps of:
a1, comprehensively evaluating a vehicle part, generating a corresponding evaluation result, and selecting a protected part and one or more pre-protection parts corresponding to the protected part from the vehicle part according to the evaluation result;
a2, sensing the running state of the vehicle, generating a corresponding sensing result, and selecting a protection piece corresponding to the protected piece from all the pre-protection pieces according to the sensing result;
a3, adjusting structural parameters of the protected piece according to the bearing performance of the protected piece and the protected piece;
the step A1 comprises the following steps:
step A11, performing failure evaluation on the vehicle part, and selecting the protected piece from the vehicle part according to a failure evaluation result;
step a12 of performing sensitivity evaluation on the vehicle parts associated with the protected pieces, and selecting one or more pre-protection pieces corresponding to the protected pieces from the vehicle parts associated with the protected pieces according to the sensitivity evaluation result.
2. The vehicle structural design method of claim 1, wherein the failure evaluation includes a cost evaluation, a performance evaluation, and a structural evaluation.
3. The vehicle structural design method according to claim 1, characterized in that the method of sensing the running state of the vehicle includes:
identifying image data acquired by an image module when the vehicle runs; and/or
Acquiring a detection result acquired by a sensing module when the vehicle runs; and/or
And acquiring sound acquired by the sound module when the vehicle runs.
4. The vehicle structural design method according to claim 3, wherein the detection result includes:
the speed of the left and right wheels when the vehicle is running; and/or
A travel route of the vehicle when running; and/or
The heights of left and right wheels when the vehicle runs; and/or
Jitter conditions when the vehicle is running.
5. The vehicle structural design method according to claim 1, wherein the step A3 includes:
step A31, obtaining a first bearing performance of the protected piece;
step A32, obtaining a second bearing performance of the protection piece;
and step A33, adjusting structural parameters of the protection piece according to the first bearing performance and the second bearing performance.
6. The vehicle structural design method according to claim 5, wherein the first load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member, and the second load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member;
in the step a33, the upper limit of the structural parameter of the protection member is adjusted according to the lower limit of the unconventional load-bearing performance of the protected member, and the lower limit of the structural parameter of the protection member is adjusted according to the upper limit of the conventional load-bearing performance of the protection member.
7. A vehicle structural design system, comprising:
the comprehensive evaluation module is used for comprehensively evaluating the vehicle part and generating a corresponding evaluation result, and selecting a protected part and one or more pre-protected parts corresponding to the protected part from the vehicle part according to the evaluation result;
the sensing module is connected with the comprehensive evaluation module and is used for sensing the running state of the vehicle and generating a corresponding sensing result, and determining the protection piece corresponding to the protected piece from all the pre-protection pieces according to the sensing result;
the adjusting module is connected with the comprehensive evaluation module and the sensing module and is used for adjusting structural parameters of the protected piece according to the bearing performance of the protected piece and the protected piece;
the comprehensive evaluation module comprises:
the first evaluation unit is used for performing failure evaluation on the vehicle part and selecting the protected part from the vehicle part according to a failure evaluation result;
and the second evaluation unit is connected with the first evaluation unit and is used for performing sensitivity evaluation on the vehicle parts related to the protected parts and selecting one or more pre-protection parts corresponding to the protected parts from the vehicle parts related to the protected parts according to the sensitivity evaluation result.
8. The vehicle structural design system according to claim 7, wherein the first evaluation unit includes:
a cost evaluation unit for performing cost evaluation on the vehicle part and generating a cost evaluation result;
a performance evaluation unit for performing performance evaluation on the vehicle part and generating a performance evaluation result;
and the structure evaluation component is used for carrying out structure evaluation on the vehicle part and generating a structure evaluation result.
9. The vehicle structural design system of claim 7, wherein the perception module comprises:
the first sensing unit is used for identifying image data acquired by the image module when the vehicle runs; and/or
The second sensing unit is used for acquiring a detection result acquired by the sensing module when the vehicle runs; and/or
And the third perception unit is used for acquiring the sound acquired by the sound module when the vehicle runs.
10. The vehicle structural design system according to claim 9, wherein the second sensing unit includes a first acquisition means for acquiring speeds of left and right wheels when the vehicle is running; and/or
The second sensing unit comprises a second acquisition component for acquiring a driving route of the vehicle during running; and/or
The second sensing unit comprises a third acquisition component for acquiring the heights of left and right wheels when the vehicle runs; and/or
The second sensing unit comprises a fourth acquisition component for acquiring the jitter condition of the vehicle during running.
11. The vehicle structural design system of claim 7, wherein the adjustment module comprises:
the first adjusting unit is used for acquiring the first bearing performance of the protected piece;
the second adjusting unit is used for acquiring a second bearing performance of the protection piece;
and the third adjusting unit is connected with the first adjusting unit and the second adjusting unit and is used for adjusting the structural parameters of the protection piece according to the first bearing performance and the second bearing performance.
12. The vehicle structural design system according to claim 11, wherein the first load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member, and the second load bearing performance includes a normal load bearing performance and an unconventional load bearing performance of the protected member;
the third adjusting unit comprises:
and the adjusting component is used for adjusting the upper limit of the structural parameter of the protecting piece according to the lower limit of the unconventional bearing performance of the protected piece and adjusting the lower limit of the structural parameter of the protecting piece according to the upper limit of the conventional bearing performance of the protecting piece.
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