[0061] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0062] See figure 1 The method for optimizing the structure of a vehicle body proposed in the first embodiment of the present invention includes steps S101 to S103.
[0063] S101: Obtain the suspension physical structure of the vehicle body, and build a multi-body dynamics model according to the suspension physical structure;
[0064] Among them, you can refer to figure 2 For the suspension physical structure of a certain vehicle model, ADAMS software can be used to build a multi-body dynamic model based on the suspension physical structure. The hard point parameters used in the model can be seen in Table 1.
[0065] Table 1 Hard point parameter table
[0066]
[0067] S102: Use multi-body dynamics simulation software to analyze the movement of the wheel when jumping with the suspension, and adjust the movement of the wheel according to the sensitivity of the suspension parts;
[0068] Among them, the multi-body dynamics simulation software used is, for example, ADAMS software.
[0069] See image 3 , Step S102 may specifically include S1021 to S1023:
[0070] S1021: Obtain the hard point to be adjusted;
[0071] S1022: Obtain the basic wheel motion state curve of the wheel jitter value and the wheel forward and backward movement value, and set the target wheel motion state curve of the wheel jitter value and the wheel forward and backward movement value at the same time;
[0072] For example, you can see Figure 4 , The figure shows the basic wheel motion state curve of the wheel bounce value and the wheel forward and backward movement value in the model of this embodiment, and the target wheel motion state curve of the set wheel bounce value and the wheel forward and backward movement value. In the figure, horizontal The coordinate is the wheel bounce value, and the ordinate is the wheel movement value. The curve reflects the retraction of the wheel. It should be pointed out that the target wheel movement state curve can be set according to the actual situation of the vehicle model.
[0073] S1023: Adjust the hard points to be adjusted to optimize the basic wheel motion state curve as the target wheel motion state curve.
[0074] In specific implementation, in step S1021, the following methods can be used in the ADAMS software to obtain the hard points to be adjusted:
[0075] Carry out the same direction double-wheel excitation test on the multi-body dynamics model to simulate the wheel jumping condition;
[0076] Create a new target object in the multi-body dynamics software to prepare for subsequent analysis;
[0077] Enter Adams_Insight to test and analyze the suspension sensitivity;
[0078] Select relevant hard points and set them as optimization variables;
[0079] Select the newly created target object and optimize this target;
[0080] Analyze and calculate the selected optimization target;
[0081] Fit the result of the optimization target;
[0082] Check the sensitivity analysis result, and use the hard point with the largest influence as the hard point to be adjusted.
[0083] S103: Adjust the main bushing characteristics of the suspension to make the bushing absorb more impact energy from the wheel.
[0084] Among them, see Figure 5 , This step specifically includes S1031~S1032:
[0085] S1031: Obtain the original state curve of the bushing force, and set the target state curve of the bushing force at the same time;
[0086] For example, you can see Image 6 , The figure shows the original state curve of the bushing force and the set target state curve of the bushing force in the model of this embodiment. In the figure, the abscissa is the deformation of the bush and the ordinate is the bush For the force value, the curve reflects the deformation of the bushing. It should be pointed out that the target state curve can be set according to the actual situation of the vehicle type.
[0087] S1032, adjusting the bushing characteristics of the compliance bushing in the suspension to optimize the original state curve to the target state curve, so that the bushing absorbs more impact energy from the wheel.
[0088] According to the vehicle body structure optimization method provided by this embodiment, the suspension multi-body dynamics analysis method is used to determine whether the wheel movement condition is reasonable when the suspension is jumping, and whether the movement relationship of the front and rear wheels matches. The sensitivity of the suspension parts The adjustment of the wheel motion conditions can improve the vehicle wheel motion conditions. By optimizing the characteristics of the suspension ride comfort bushing, the impact energy transmitted from the wheels to the body is greatly reduced, and the ride comfort of the vehicle is improved. This method is in the design stage It can confirm the kinematic characteristics of the suspension mechanism through multi-body kinematics analysis, and re-optimize the design of the bushing structure according to the vehicle parameter information. In the chassis development process, the existing suspension structure can be borrowed to a great extent to improve the universality of parts. It can effectively reduce the cost of chassis development and optimization, and can greatly improve the performance of the vehicle.
[0089] See Figure 7 Based on the same inventive concept, the vehicle body structure optimization system proposed in the second embodiment of the present invention includes:
[0090] Obtain the building module 10, which is used to obtain the suspension physical structure of the vehicle body, and build a multi-body dynamic model according to the suspension physical structure;
[0091] The first adjustment module 20 is used to analyze the movement condition of the wheel when jumping with the suspension through the multi-body dynamics simulation software, and adjust the movement condition of the wheel according to the sensitivity of the suspension parts;
[0092] The second adjustment module 30 is used to adjust the main bushing characteristics of the suspension so that the bushing absorbs more impact energy from the wheel.
[0093] Wherein, the first adjustment module 20 includes:
[0094] The first obtaining unit 21 is configured to obtain the hard point to be adjusted;
[0095] The second acquiring unit 22 is configured to acquire the basic wheel motion state curve of the wheel jitter value and the wheel forward and backward movement value, and set the target wheel motion state curve of the wheel jitter value and the wheel forward and backward movement value at the same time;
[0096] The first adjustment unit 23 is configured to adjust the hard point to be adjusted to optimize the basic wheel motion state curve to the target wheel motion state curve.
[0097] Wherein, the first obtaining unit 21 is specifically configured to:
[0098] Carry out the same direction double-wheel excitation test on the multi-body dynamics model to simulate the wheel jumping condition;
[0099] Create a new target object in the multi-body dynamics software to prepare for subsequent analysis;
[0100] Enter Adams_Insight to test and analyze the suspension sensitivity;
[0101] Select relevant hard points and set them as optimization variables;
[0102] Select the newly created target object and optimize this target;
[0103] Analyze and calculate the selected optimization target;
[0104] Fit the result of the optimization target;
[0105] Check the sensitivity analysis result, and use the hard point with the largest influence as the hard point to be adjusted.
[0106] Wherein, the second adjustment module 30 includes:
[0107] The third acquiring unit 31 is used to acquire the original state curve of the force of the bushing, and set the target state curve of the force of the bush at the same time;
[0108] The second adjustment unit 32 is used to adjust the bush characteristics of the compliance bush in the suspension to optimize the original state curve to the target state curve so that the bush absorbs more impact energy from the wheel .
[0109] In this embodiment, the multi-body dynamics simulation software uses ADAMS software.
[0110] According to the vehicle body structure optimization system provided by this embodiment, the suspension multi-body dynamics analysis method is used to determine whether the wheel motion condition is reasonable when the suspension is jumping, and whether the motion relationship between the front and rear wheels matches. The sensitivity of the suspension parts The wheel movement condition is adjusted to achieve the improvement of the vehicle wheel movement condition. By optimizing the characteristics of the suspension ride comfort bushing, the impact energy transmitted from the wheel to the body is greatly weakened, and the ride comfort of the vehicle is improved. The system is in the design stage It can confirm the kinematic characteristics of the suspension mechanism through multi-body kinematics analysis, and re-optimize the design of the bushing structure according to the vehicle parameter information. In the chassis development process, the existing suspension structure can be borrowed to a great extent to improve the universality of parts. It can effectively reduce the cost of chassis development and optimization, and can greatly improve the performance of the vehicle.
[0111] The logic and/or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing logic functions, and can be embodied in any computer-readable medium, For use by instruction execution systems, devices, or equipment (such as computer-based systems, systems including processors, or other systems that can fetch and execute instructions from instruction execution systems, devices, or equipment), or combine these instruction execution systems, devices Or equipment. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, device, or device or in combination with these instruction execution systems, devices, or devices.
[0112] More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections (electronic devices) with one or more wiring, portable computer disk cases (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable and editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable media on which the program can be printed, because it can be used, for example, by optically scanning the paper or other media, and then editing, interpreting, or other suitable media if necessary. The program is processed in a manner to obtain the program electronically and then stored in the computer memory.
[0113] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the foregoing embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented by hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: a logic gate circuit for implementing logic functions on data signals Discrete logic circuits, application-specific integrated circuits with suitable combinational logic gates, programmable gate array (PGA), field programmable gate array (FPGA), etc.
[0114] In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , Structure, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.
[0115] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and modifications can be made to these embodiments without departing from the principle and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.
