Durability analysis method, device, equipment and storage medium based on torque influence

Abstract

The present invention belongs to the technical field of vehicle evaluation, and discloses a durability analysis method, device, equipment and storage medium based on torque influence. The method includes: extracting hard point virtual load signals from virtual test field simulation results; obtaining torque virtual load spectrum and torque-free virtual load spectrum according to virtual test field simulation results and hard point virtual load signals; establishing a finite element model of the target vehicle, and determining the test hard points according to the finite element model; performing unit force loading test on the test hard points to obtain test results; performing fatigue durability analysis on the target vehicle according to the test results, torque virtual load spectrum and torque-free virtual load spectrum to obtain reference durability analysis results; performing damage value assessment test according to the durability analysis results to obtain target durability analysis results. It is realized that the influence of torque on the fatigue durability simulation analysis results of the whole vehicle can be evaluated without a physical prototype vehicle and without collecting road spectra on the actual road surface, thus shortening the vehicle development cycle and saving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle evaluation, and in particular to a durability analysis method, device, equipment and storage medium based on torque influence. Background Art

[0002] At present, virtual test field simulation technology has been widely used due to its advantages such as low cost and short development cycle. The accuracy of Z-direction force has been fully verified, and the accuracy of X / Y-direction force has also been effectively evaluated. Since the influencing factors of torque are uncontrollable, it is difficult to make the torque calibration well by adjusting the dynamic model, so the accuracy of wheel center torque TX / TY / TZ has never been included in the load calibration category. When the torque accuracy is uncontrollable, the evaluation of the impact of torque on the results of fatigue and durability simulation is not accurate, resulting in low reliability of fatigue and durability simulation.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a durability analysis method, device, equipment and storage medium based on torque influence, aiming to solve the technical problem of inaccurate evaluation of the influence of torque on the results of fatigue durability simulation in the prior art.

[0005] To achieve the above object, the present invention provides a durability analysis method based on torque influence, the method comprising the following steps:

[0006] Extract hard point virtual load signals from virtual test field simulation results;

[0007] Obtaining a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation results and the hard point virtual load signal;

[0008] Establishing a finite element model of the target vehicle and determining test hard points based on the finite element model;

[0009] Performing a unit force loading test on the test hard point to obtain a test result;

[0010] Perform fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result;

[0011] A damage value assessment test is performed based on the reference durability analysis result to obtain a target durability analysis result.

[0012] Optionally, before extracting the hard point virtual load signal from the virtual test field simulation result, the method further includes:

[0013] Get vehicle parameter information;

[0014] Establishing a suspension multi-body dynamics model according to the vehicle parameter information;

[0015] Obtaining a whole vehicle multi-body dynamics model according to the suspension multi-body dynamics model;

[0016] A virtual proving ground simulation is performed according to the preset virtual proving ground road surface and the whole vehicle multi-body dynamics model to obtain a virtual proving ground simulation result.

[0017] Optionally, obtaining a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation result and the hard point virtual load signal includes:

[0018] Establishing a hard point load output channel according to the hard point virtual load signal;

[0019] Selecting a target hard point load output channel according to the hard point load output channel;

[0020] Determine a virtual torque load spectrum according to the virtual test field simulation result and the target hard point load output channel;

[0021] A torque-free virtual load spectrum is obtained according to the torque virtual load spectrum.

[0022] Optionally, performing a unit force loading test on the test hard point to obtain a test result includes:

[0023] Performing 6-direction unit force loading on the test hard point to obtain a torque unit force loading model;

[0024] Performing three-way unit force loading on the test hard point to obtain a torque-free unit force loading model;

[0025] The test results are obtained according to the torque unit force loading model and the no-torque unit force loading model.

[0026] Optionally, performing fatigue durability analysis on the target vehicle according to the test result, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result includes:

[0027] Obtaining a torque unit force calculation result and a torque-free unit force calculation result according to the test results;

[0028] Obtaining a torque fatigue durability simulation analysis result according to the torque unit force calculation result and the torque virtual load spectrum;

[0029] Obtaining a no-torque fatigue durability simulation analysis result according to the no-torque unit force calculation result and the no-torque virtual load spectrum;

[0030] A reference durability analysis result of the target vehicle is obtained according to the torque fatigue durability simulation analysis result and the no-torque fatigue durability simulation analysis result.

[0031] Optionally, performing a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result includes:

[0032] Determining sheet metal welding point damage information according to the reference durability analysis result;

[0033] Obtaining a torque target damage area and a torque-free target damage area according to the sheet metal weld damage information;

[0034] determining a damage value ratio according to the torque target damage area and the no-torque target damage area;

[0035] A target durability analysis result is obtained according to the damage value ratio.

[0036] Optionally, obtaining a target durability analysis result according to the damage value ratio includes:

[0037] comparing the damage value ratio with a target ratio range;

[0038] When the damage value ratio is within the target ratio range, determining the durability analysis result of the target vehicle as having no impact;

[0039] When the damage value ratio is not within the target ratio range, the target durability analysis result is determined to have an impact.

[0040] In addition, to achieve the above-mentioned purpose, the present invention further proposes a durability analysis device based on torque influence, the durability analysis device based on torque influence comprising:

[0041] A signal extraction module is used to extract hard point virtual load signals from the simulation results of the virtual test field;

[0042] A load spectrum generating module, used for obtaining a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation result and the hard point virtual load signal;

[0043] A model building module, used to build a finite element model of the target vehicle and determine the test hard points according to the finite element model;

[0044] A unit force test module, used to perform a unit force loading test on the test hard point to obtain a test result;

[0045] A durability analysis module, used for performing fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result;

[0046] The impact analysis module is used to perform a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result.

[0047] In addition, to achieve the above-mentioned purpose, the present invention also proposes a durability analysis device based on torque influence, and the durability analysis device based on torque influence includes: a memory, a processor, and a durability analysis program based on torque influence stored in the memory and executable on the processor, and the durability analysis program based on torque influence is configured to implement the steps of the durability analysis method based on torque influence as described above.

[0048] In addition, to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which a durability analysis program based on torque influence is stored. When the durability analysis program based on torque influence is executed by a processor, the steps of the durability analysis method based on torque influence as described above are implemented.

[0049] The present invention extracts hard point virtual load signals from virtual test field simulation results; obtains torque virtual load spectrum and torque-free virtual load spectrum according to the virtual test field simulation results and the hard point virtual load signals; establishes a finite element model of the target vehicle, and determines the test hard points according to the finite element model; performs unit force loading test on the test hard points to obtain test results; performs fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain reference durability analysis results; performs damage value assessment test according to the reference durability analysis results to obtain target durability analysis results. In this way, based on the virtual test field simulation results combined with the load spectrum, it is possible to quickly, effectively and accurately evaluate the impact of torque on the fatigue durability simulation analysis results of the whole vehicle without a physical sample vehicle and without a road spectrum collected from an actual road surface, thereby shortening the vehicle development cycle and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural schematic diagram of a torque-influence-based durability analysis device in a hardware operating environment involved in an embodiment of the present invention;

[0051] Figure 2 It is a flow chart of the first embodiment of the durability analysis method based on torque influence of the present invention;

[0052] Figure 3 It is a flow chart of the second embodiment of the durability analysis method based on torque influence of the present invention;

[0053] Figure 4 It is a structural block diagram of the first embodiment of the durability analysis device based on torque influence of the present invention.

[0054] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0056] Reference Figure 1 , Figure 1 It is a schematic diagram of the structure of a durability analysis device based on torque influence in the hardware operating environment involved in the embodiment of the present invention.

[0057] like Figure 1 As shown, the durability analysis device based on torque influence may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0058] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the durability analysis device based on torque influence, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0059] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a durability analysis program based on torque influence.

[0060] exist Figure 1In the durability analysis device based on torque influence shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the durability analysis device based on torque influence of the present invention can be set in the durability analysis device based on torque influence, and the durability analysis device based on torque influence calls the durability analysis program based on torque influence stored in the memory 1005 through the processor 1001, and executes the durability analysis method based on torque influence provided by the embodiment of the present invention.

[0061] The embodiment of the present invention provides a durability analysis method based on torque influence, referring to Figure 2 , Figure 2 It is a flow chart of a first embodiment of a durability analysis method based on torque influence of the present invention.

[0062] In this embodiment, the durability analysis method based on torque influence includes the following steps:

[0063] Step S10: extracting hard point virtual load signals from the virtual test field simulation results.

[0064] It should be noted that the executor of this embodiment may be a computer, specifically a computer device that can implement the durability analysis method based on torque influence, and may be a personal computer, a laptop computer or other devices that can implement this kinetic energy.

[0065] It should be understood that in the current existing vehicle testing methods, the effect of torque on the vehicle's whole vehicle durability simulation analysis results is not accurate, resulting in low simulation reliability of the vehicle's fatigue durability, thereby increasing the cost and time of vehicle development. The solution of the present application uses simulation results based on a virtual test field combined with a load spectrum to achieve a rapid, effective and accurate evaluation of the effect of torque on the vehicle's whole vehicle fatigue durability simulation analysis results without a physical prototype vehicle and without a road spectrum collected from actual road surfaces.

[0066] In specific implementation, the virtual test field simulation result refers to a simulation test conducted on a fictitious virtual test field road surface combined with a whole-vehicle multi-body dynamics model of a target vehicle. The virtual test field simulation is implemented based on ADAMS software.

[0067] It should be noted that the hard point virtual load signal refers to the signal of the request channel of each hard point including various control points, lines, surfaces and control features of the whole vehicle and key components in the modeling of the whole vehicle multi-body dynamics model.

[0068] Furthermore, in order to accurately perform virtual test field simulation, before step S10, it also includes: obtaining vehicle parameter information; establishing a suspension multi-body dynamics model according to the vehicle parameter information; obtaining a whole vehicle multi-body dynamics model according to the suspension multi-body dynamics model; performing virtual test field simulation according to a preset virtual test field road surface and the whole vehicle multi-body dynamics model to obtain a virtual test field simulation result.

[0069] It should be understood that the vehicle parameter information refers to various vehicle-related information of the target vehicle, including but not limited to: vehicle model, dimensions of various parts, information related to supporting parts, etc.

[0070] In a specific implementation, obtaining the whole vehicle multibody dynamics model according to the suspension multibody dynamics model means: performing KC benchmarking and model calibration on the front suspension and rear suspension of the suspension multibody dynamics model respectively, and then building the whole vehicle multibody dynamics model. Among them, the model calibration is based on the measured data, mainly fine-tuning the static stiffness of the bushing, the stiffness of the buffer block, the spring preload, etc. The whole vehicle multibody dynamics model includes the front suspension subsystem, the rear suspension subsystem, the body subsystem, the steering subsystem, the power subsystem, the brake subsystem and the Ftire tire.

[0071] It should be noted that the virtual proving ground simulation is performed according to the preset virtual proving ground road surface and the multi-body dynamics model of the whole vehicle, and the virtual proving ground simulation result is obtained by importing the virtual proving ground road surface and the multi-body dynamics model of the whole vehicle into the Adams software to perform the virtual proving ground simulation. Among them, the virtual proving ground is in the format recognized by Adams, *.crg format, the virtual proving ground simulation analysis driving condition uses the 3D Road condition, the solver is set to the HHT algorithm, and the error tolerance is set to 1e-4.

[0072] In this way, virtual test field simulation is achieved by combining the preset virtual test field road surface with the multi-body dynamics model of the whole vehicle, thereby obtaining the virtual test field simulation results, making the simulation more reliable.

[0073] Step S20: obtaining a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation result and the hard point virtual load signal.

[0074] It should be understood that obtaining the torque virtual load spectrum and the torque-free virtual load spectrum based on the virtual test field simulation results and the hard point virtual load signal means: determining the hard point load output channel of each hard point based on the hard point virtual load signal, then selecting the target hard point load output channel of the target hard point, and finally obtaining the torque virtual load spectrum with torque in combination with the virtual test field simulation results, and then obtaining the torque-free virtual load spectrum through the torque virtual load spectrum.

[0075] Furthermore, in order to obtain a separated torque virtual load spectrum and a torque-free virtual load spectrum, step S20 includes: establishing a hard point load output channel according to the hard point virtual load signal; selecting a target hard point load output channel according to the hard point load output channel; determining a torque virtual load spectrum according to the virtual test field simulation results and the target hard point load output channel; and obtaining a torque-free virtual load spectrum according to the torque virtual load spectrum.

[0076] In a specific implementation, establishing a hard point load output channel according to the hard point virtual load signal means: when building a vehicle multi-body dynamics model, establishing a request channel for each hard point load output, that is, a hard point load output channel.

[0077] It should be noted that selecting the target hard point load output channel according to the hard point load output channel means: selecting the hard point that needs to be subjected to durability analysis from all hard point load output channels, and then using the load output channel of the hard point that needs to be subjected to durability analysis as the target hard point load output channel.

[0078] It should be understood that determining the torque virtual load spectrum based on the virtual test field simulation results and the target hard point load output channel means: after each durable road simulation is completed, a *.Req result file is generated, and then the result file is imported into Ncode, and the hard point load channel of the parts to be subjected to fatigue durability analysis, that is, the target hard point load output channel, is selected and saved as a torque virtual load spectrum.

[0079] In a specific implementation, obtaining a torque-free virtual load spectrum according to the torque virtual load spectrum means: importing the torque virtual load spectrum into Ncode, deleting the torque load spectrum channel (TX / TY / TZ) of each hard point, and saving it as a torque-free virtual load spectrum.

[0080] In this way, it is possible to obtain separated torque virtual load spectra and torque-free virtual load spectra based on the hard point virtual load signal and the virtual test field simulation results, thereby making the subsequent analysis of the influence of torque on the fatigue durability of the vehicle more accurate.

[0081] Step S30: establishing a finite element model of the target vehicle, and determining test hard points according to the finite element model.

[0082] It should be noted that the finite element model refers to the model established when the finite element analysis method is used. It is a group of unit combinations that are connected only at the nodes, transmit forces only at the nodes, and are constrained only at the nodes. The finite element model includes the body in white, door system, seats, CCB, front frame, front subframe, and counterweights of each system.

[0083] It should be understood that establishing a finite element model of the target vehicle and determining the test hard points based on the finite element model means that each hard point connecting the finite element model and the chassis is used as a test hard point.

[0084] Step S40: performing a unit force loading test on the test hard point to obtain a test result.

[0085] It should be understood that performing a unit force loading test on the test hard points refers to loading a unit force on each test hard point respectively, thereby performing a unit force loading model, and finally obtaining a torque unit force loading model and a torque-free unit force loading model of the test results.

[0086] Furthermore, in order to accurately perform the unit force loading test, step S40 includes: performing 6-way unit force loading on the test hard point to obtain a torque unit force loading model; performing 3-way unit force loading on the test hard point to obtain a torque-free unit force loading model; and obtaining test results based on the torque unit force loading model and the torque-free unit force loading model.

[0087] In a specific implementation, obtaining the test results according to the torque unit force loading model and the no-torque unit force loading model means: performing NASTRAN calculation on the torque unit force loading model to obtain a torque unit force calculation result file, i.e., an *.OP2 file. Performing NASTRAN calculation on the no-torque unit force loading model to obtain a no-torque unit force calculation result file, i.e., an *.OP2 file. Then, the torque unit force calculation result file and the no-torque unit force calculation result file are used as the test results.

[0088] In this way, it is possible to load 6-direction and 3-direction unit forces on each test hard point, thereby performing a unit force loading test and obtaining the test results, making the test results more accurate.

[0089] Step S50: performing fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result.

[0090] It should be noted that performing fatigue durability analysis on the target vehicle based on the test results, the torque virtual load spectrum and the no-torque virtual load spectrum means: performing fatigue durability simulation analysis based on the torque unit force calculation results and the no-torque unit force calculation results in the test results, and then combining the torque fatigue durability simulation analysis results and the no-torque fatigue durability simulation analysis results to comprehensively obtain a reference durability analysis result of the target vehicle.

[0091] Further, in order to accurately obtain the reference durability analysis result, step S50 includes: obtaining the torque unit force calculation result and the no-torque unit force calculation result according to the test results; obtaining the torque fatigue durability simulation analysis result according to the torque unit force calculation result and the torque virtual load spectrum; obtaining the no-torque fatigue durability simulation analysis result according to the no-torque unit force calculation result and the no-torque virtual load spectrum; obtaining the reference durability analysis result of the target vehicle according to the torque fatigue durability simulation analysis result and the no-torque fatigue durability simulation analysis result.

[0092] It should be noted that obtaining the torque fatigue durability simulation analysis result based on the torque unit force calculation result and the torque virtual load spectrum means: based on Ncode software, combined with the torque virtual load spectrum of torque and the torque unit force calculation result *.OP2 file, fatigue durability simulation analysis is performed to obtain the torque fatigue durability simulation analysis result file *.hyp.

[0093] It should be understood that obtaining the torque-free fatigue durability simulation analysis result based on the torque-free unit force calculation result and the torque-free virtual load spectrum means: based on Ncode software, combined with the torque-free virtual load spectrum and the torque-free unit force calculation result *.OP2 file, fatigue durability simulation analysis is performed to obtain the torque-free fatigue durability simulation analysis result file *.hyp.

[0094] In a specific implementation, obtaining the reference durability analysis result of the target vehicle based on the torque fatigue durability simulation analysis result and the no-torque fatigue durability simulation analysis result means: using the result file of the torque fatigue durability simulation analysis and the result file of the no-torque fatigue durability simulation analysis as the reference durability analysis result.

[0095] In this way, it is possible to combine the test results with the torque virtual load spectrum and the no-torque virtual load spectrum to obtain the torque fatigue durability simulation analysis results and the no-torque fatigue durability simulation analysis results respectively, and then obtain the reference durability analysis results, making the reference durability analysis results more accurate, and thus accurately evaluating the influence of torque on the fatigue durability of the whole vehicle.

[0096] Step S60: performing a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result.

[0097] It should be noted that performing a damage value assessment test based on the reference durability analysis results to obtain a target durability analysis result means: determining the sheet metal and weld damage information of each sheet metal and weld of the target vehicle based on the reference durability analysis results, then determining the torque target damage area and the torque-free target damage area, and finally determining the target durability analysis result by calculating the damage value ratio.

[0098] This embodiment extracts the hard point virtual load signal from the virtual test field simulation results; obtains the torque virtual load spectrum and the torque-free virtual load spectrum according to the virtual test field simulation results and the hard point virtual load signal; establishes a finite element model of the target vehicle, and determines the test hard point according to the finite element model; performs a unit force loading test on the test hard point to obtain the test result; performs fatigue durability analysis on the target vehicle according to the test result, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain the reference durability analysis result; performs a damage value assessment test according to the reference durability analysis result to obtain the target durability analysis result. In this way, based on the virtual test field simulation results combined with the load spectrum, it is possible to quickly, effectively and accurately evaluate the impact of torque on the fatigue durability simulation analysis results of the whole vehicle without a physical prototype vehicle and a road spectrum collected from the actual road surface, thereby shortening the vehicle development cycle and saving costs.

[0099] refer to Figure 3 , Figure 3 It is a flow chart of a second embodiment of a durability analysis method based on torque influence of the present invention.

[0100] Based on the first embodiment described above, the durability analysis method based on torque influence in this embodiment includes in step S60:

[0101] Step S601: Determine sheet metal welding point damage information according to the reference durability analysis result.

[0102] It should be noted that determining the sheet metal weld damage information based on the reference durability analysis results means: extracting damage values ​​of each sheet metal and weld under both conditions with and without torque from the reference durability analysis results as the sheet metal weld damage information.

[0103] Step S602: obtaining a torque target damage area and a torque-free target damage area according to the sheet metal weld damage information.

[0104] It should be understood that obtaining the torque target damage area and the no-torque target damage area based on the sheet metal weld damage information means: post-processing the torque fatigue durability simulation analysis results, reading the maximum sheet metal and weld damage values ​​and the values ​​of damage greater than 1 in the sheet metal weld damage information, and then taking the area corresponding to the maximum sheet metal and weld damage values ​​and the values ​​of damage greater than 1 as the torque target damage area; then post-processing the no-torque fatigue durability simulation analysis results, reading the maximum sheet metal and weld damage values ​​and the values ​​of damage greater than 1, and then taking the area corresponding to the maximum sheet metal and weld damage values ​​and the values ​​of damage greater than 1 as the no-torque target damage area.

[0105] Step S603: determining a damage value ratio according to the torque target damage area and the no-torque target damage area.

[0106] In a specific implementation, determining the damage value ratio based on the torque target damage area and the no-torque target damage area means: comparing whether the areas with the maximum damage values ​​and the areas with damage greater than 1 in the torque target damage area and the no-torque target damage area are consistent, and then dividing the no-torque damage value in the same area by the torque damage value to obtain the damage value ratio.

[0107] Step S604: Obtain a target durability analysis result according to the damage value ratio.

[0108] It should be noted that obtaining the target durability analysis result according to the damage value ratio refers to comparing the damage value ratio with the target ratio to determine the specific content of the target durability analysis result.

[0109] Furthermore, in order to accurately determine the target durability analysis result, step S604 includes: comparing the damage value ratio with the target ratio range; when the damage value ratio is within the target ratio range, determining the target vehicle durability analysis result as having no impact; when the damage value ratio is not within the target ratio range, determining the target durability analysis result as having an impact.

[0110] It should be understood that the target ratio range refers to a range pre-set by a user for setting the size of the damage value ratio, which is generally 0.5-2.0.

[0111] In a specific implementation, when the damage value ratio is within the target ratio range, determining the target vehicle durability analysis result as having no effect means that the damage value ratio is within the target range of 0.5 to 2.0, and when the torque accuracy is uncontrollable, it has little effect on the results of the sheet metal fatigue durability simulation analysis, and the effect of the torque accuracy can be ignored, that is, there is no effect.

[0112] It should be noted that, when the damage value ratio is not within the target ratio range, determining the target durability analysis result as having an impact means that: the damage value ratio value exceeds the target range of 0.5 to 2.0, indicating that the torque has a greater impact on the fatigue durability simulation analysis results of the whole vehicle. When the torque accuracy is uncontrollable, it is necessary to give a safety factor in combination with the road test results. Therefore, the target durability analysis result at this time is that there is an impact, and then the user is prompted to give a safety factor in combination with the road test results.

[0113] In this way, the target durability analysis result is accurately determined according to the comparison result between the damage value ratio and the target ratio range, so as to evaluate the influence of torque on the fatigue durability simulation analysis of the whole vehicle.

[0114] This embodiment determines sheet metal weld damage information according to the reference durability analysis result; obtains torque target damage area and non-torque target damage area according to the sheet metal weld damage information; determines damage value ratio according to the torque target damage area and non-torque target damage area; obtains target durability analysis result according to the damage value ratio. In this way, the influence of torque on vehicle fatigue durability is quantified by calculating the damage value ratio of the torque target damage area and the non-torque target damage area.

[0115] In addition, an embodiment of the present invention further proposes a storage medium, on which a durability analysis program based on torque influence is stored. When the durability analysis program based on torque influence is executed by a processor, the steps of the durability analysis method based on torque influence as described above are implemented.

[0116] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0117] Reference Figure 4 , Figure 4 It is a structural block diagram of the first embodiment of the durability analysis device based on torque influence of the present invention.

[0118] like Figure 4 As shown, the durability analysis device based on torque influence proposed in the embodiment of the present invention includes:

[0119] The signal extraction module 10 is used to extract the hard point virtual load signal from the virtual test field simulation results.

[0120] The load spectrum generating module 20 is used to obtain a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation result and the hard point virtual load signal.

[0121] The model building module 30 is used to build a finite element model of the target vehicle and determine the test hard points according to the finite element model.

[0122] The unit force testing module 40 is used to perform a unit force loading test on the test hard point to obtain a test result.

[0123] The durability analysis module 50 is used to perform fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result.

[0124] The impact analysis module 60 is used to perform a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result.

[0125] This embodiment extracts the hard point virtual load signal from the virtual test field simulation results; obtains the torque virtual load spectrum and the torque-free virtual load spectrum according to the virtual test field simulation results and the hard point virtual load signal; establishes a finite element model of the target vehicle, and determines the test hard point according to the finite element model; performs a unit force loading test on the test hard point to obtain the test result; performs fatigue durability analysis on the target vehicle according to the test result, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain the reference durability analysis result; performs a damage value assessment test according to the reference durability analysis result to obtain the target durability analysis result. In this way, based on the virtual test field simulation results combined with the load spectrum, it is possible to quickly, effectively and accurately evaluate the impact of torque on the fatigue durability simulation analysis results of the whole vehicle without a physical prototype vehicle and a road spectrum collected from the actual road surface, thereby shortening the vehicle development cycle and saving costs.

[0126] In one embodiment, the signal extraction module 10 is also used to obtain vehicle parameter information; establish a suspension multi-body dynamics model based on the vehicle parameter information; obtain a whole vehicle multi-body dynamics model based on the suspension multi-body dynamics model; perform a virtual test field simulation based on a preset virtual test field road surface and the whole vehicle multi-body dynamics model to obtain a virtual test field simulation result.

[0127] In one embodiment, the load spectrum generation module 20 is also used to establish a hard point load output channel according to the hard point virtual load signal; select a target hard point load output channel according to the hard point load output channel; determine a torque virtual load spectrum according to the virtual test field simulation results and the target hard point load output channel; and obtain a torque-free virtual load spectrum according to the torque virtual load spectrum.

[0128] In one embodiment, the unit force testing module 40 is also used to perform 6-way unit force loading on the test hard point to obtain a torque unit force loading model; perform 3-way unit force loading on the test hard point to obtain a torque-free unit force loading model; and obtain test results based on the torque unit force loading model and the torque-free unit force loading model.

[0129] In one embodiment, the durability analysis module 50 is further used to obtain a torque unit force calculation result and a no-torque unit force calculation result based on the test results; to obtain a torque fatigue durability simulation analysis result based on the torque unit force calculation result and the torque virtual load spectrum; to obtain a no-torque fatigue durability simulation analysis result based on the no-torque unit force calculation result and the no-torque virtual load spectrum; and to obtain a reference durability analysis result of the target vehicle based on the torque fatigue durability simulation analysis result and the no-torque fatigue durability simulation analysis result.

[0130] In one embodiment, the impact analysis module 60 is also used to determine sheet metal weld damage information based on the reference durability analysis results; obtain a torque target damage area and a torque-free target damage area based on the sheet metal weld damage information; determine a damage value ratio based on the torque target damage area and the torque-free target damage area; and obtain a target durability analysis result based on the damage value ratio.

[0131] In one embodiment, the impact analysis module 60 is also used to compare the damage value ratio with a target ratio range; when the damage value ratio is within the target ratio range, the target vehicle durability analysis result is determined to have no impact; when the damage value ratio is not within the target ratio range, the target durability analysis result is determined to have an impact.

[0132] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0133] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0134] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the durability analysis method based on torque influence provided in any embodiment of the present invention, which will not be described again here.

[0135] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0136] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0137] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0138] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A durability analysis method based on torque influence, characterized in that: The durability analysis method based on torque influence includes: Extract hard point virtual load signals from virtual test field simulation results; Obtaining a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation results and the hard point virtual load signal; Establishing a finite element model of the target vehicle and determining test hard points based on the finite element model; Performing a unit force loading test on the test hard point to obtain a test result; Perform fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result; Perform a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result; The performing of a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result includes: Determining sheet metal welding point damage information according to the reference durability analysis result; Obtaining a torque target damage area and a torque-free target damage area according to the sheet metal weld damage information; determining a damage value ratio according to the torque target damage area and the no-torque target damage area; A target durability analysis result is obtained according to the damage value ratio.

2. The method according to claim 1, characterized in that Before extracting the hard point virtual load signal from the virtual test field simulation result, the method further includes: Get vehicle parameter information; Establishing a suspension multi-body dynamics model according to the vehicle parameter information; Obtaining a whole vehicle multi-body dynamics model according to the suspension multi-body dynamics model; A virtual proving ground simulation is performed according to the preset virtual proving ground road surface and the whole vehicle multi-body dynamics model to obtain a virtual proving ground simulation result.

3. The method according to claim 1, characterized in that The step of obtaining a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation result and the hard point virtual load signal includes: Establishing a hard point load output channel according to the hard point virtual load signal; Selecting a target hard point load output channel according to the hard point load output channel; Determine a virtual torque load spectrum according to the virtual test field simulation result and the target hard point load output channel; A torque-free virtual load spectrum is obtained according to the torque virtual load spectrum.

4. The method according to claim 1, characterized in that The performing of a unit force loading test on the test hard point to obtain a test result includes: Performing 6-direction unit force loading on the test hard point to obtain a torque unit force loading model; Performing three-way unit force loading on the test hard point to obtain a torque-free unit force loading model; The test results are obtained according to the torque unit force loading model and the no-torque unit force loading model.

5. The method according to claim 1, characterized in that The step of performing fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result includes: Obtaining a torque unit force calculation result and a torque-free unit force calculation result according to the test results; Obtaining a torque fatigue durability simulation analysis result according to the torque unit force calculation result and the torque virtual load spectrum; Obtaining a no-torque fatigue durability simulation analysis result according to the no-torque unit force calculation result and the no-torque virtual load spectrum; A reference durability analysis result of the target vehicle is obtained according to the torque fatigue durability simulation analysis result and the no-torque fatigue durability simulation analysis result.

6. The method according to claim 1, characterized in that The step of obtaining a target durability analysis result according to the damage value ratio includes: comparing the damage value ratio with a target ratio range; When the damage value ratio is within the target ratio range, determining the durability analysis result of the target vehicle as having no impact; When the damage value ratio is not within the target ratio range, the target durability analysis result is determined to have an impact.

7. A durability analysis device based on torque influence, characterized in that: The torque-influence-based durability analysis device comprises: A signal extraction module is used to extract hard point virtual load signals from the simulation results of the virtual test field; A load spectrum generating module, used for obtaining a torque virtual load spectrum and a torque-free virtual load spectrum according to the virtual test field simulation result and the hard point virtual load signal; A model building module, used to build a finite element model of the target vehicle and determine the test hard points according to the finite element model; A unit force test module, used to perform a unit force loading test on the test hard point to obtain a test result; A durability analysis module, used for performing fatigue durability analysis on the target vehicle according to the test results, the torque virtual load spectrum and the torque-free virtual load spectrum to obtain a reference durability analysis result; An impact analysis module, used to perform a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result; The impact analysis module is also used to perform a damage value assessment test according to the reference durability analysis result to obtain a target durability analysis result, including: Determining sheet metal welding point damage information according to the reference durability analysis result; Obtaining a torque target damage area and a torque-free target damage area according to the sheet metal weld damage information; determining a damage value ratio according to the torque target damage area and the no-torque target damage area; A target durability analysis result is obtained according to the damage value ratio.

8. A durability analysis device based on torque influence, characterized in that: The device includes: a memory, a processor, and a durability analysis program based on torque influence stored in the memory and executable on the processor, wherein the durability analysis program based on torque influence is configured to implement the durability analysis method based on torque influence as described in any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a durability analysis program based on torque influence, and when the durability analysis program based on torque influence is executed by the processor, the durability analysis method based on torque influence as described in any one of claims 1 to 6 is implemented.

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