Low-frequency vibration absorber frequency bench test method and device, electronic equipment and medium

Abstract

The invention relates to a low-frequency vibration absorber frequency bench test method and device, electronic equipment and a medium, and the method comprises the steps: obtaining the test data of a vibration absorber of a vehicle under a driving condition, and constructing the boundary condition of the vibration absorber through the test data; constructing a vibration absorber test tool clamp meeting preset design conditions of the vibration absorber; and fixing the vibration absorber by using the vibration absorber test tool clamp, and carrying out frequency test on the vibration absorber based on the boundary condition to obtain a test result. Therefore, the technical problem that the performance of the vibration absorber is difficult to accurately represent due to the fact that the test result does not conform to the expected result because the factors influencing the frequency of the vibration absorber are not restrained in the related technology is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of physical testing, in particular to a low-frequency vibration absorber frequency bench test method and device, electronic equipment and medium. BACKGROUND

[0002] In related technologies, factors affecting the test frequency of the vibration absorber are not constrained, so the test results do not match the expected results, making it difficult to accurately characterize the performance of the vibration absorber. Moreover, the vibration absorber frequency test methods differ greatly, and there is no unified test method, resulting in large differences in test results between the host factory and the supplier. This leads to repeated matching and OTS recognition of the vibration absorber frequency, low efficiency, and the need for improvement. SUMMARY

[0003] The present application provides a low-frequency vibration absorber frequency bench test method, device, electronic equipment and medium to solve the technical problem that in related technologies, factors affecting the test frequency of the vibration absorber are not constrained, so the test results do not match the expected results, making it difficult to accurately characterize the performance of the vibration absorber.

[0004] The first aspect of the present application provides a low-frequency vibration absorber frequency bench test method, comprising the following steps: obtaining test data of a vibration absorber of a vehicle under a driving condition, and constructing boundary conditions of the vibration absorber using the test data; constructing a vibration absorber test tooling fixture that meets the pre-set design conditions of the vibration absorber; fixing the vibration absorber using the vibration absorber test tooling fixture, and performing frequency testing on the vibration absorber based on the boundary conditions to obtain a test result.

[0005] Optionally, in one embodiment of the present application, the test data of the vibration absorber of the vehicle under the driving condition is obtained, including: obtaining vibration data at the installation position of the vibration absorber and temperature data in the test data; based on the vibration data, obtaining excitation data in the test data of the vibration absorber.

[0006] Optionally, in one embodiment of the present application, the vibration absorber test tooling fixture that meets the pre-set design conditions of the vibration absorber is constructed, including: constructing a vibration absorber test tooling fixture model based on the frequency conditions of the vibration absorber and the bench test connection interface constraints; performing modal analysis on the vibration absorber test tooling fixture model to obtain an analysis result; optimizing the vibration absorber test tooling fixture model based on the analysis result and the pre-set model qualification conditions to obtain an actual vibration absorber test tooling fixture model, and obtaining the vibration absorber test tooling fixture based on the actual vibration absorber test tooling fixture model.

[0007] Optionally, in an embodiment of the present application, the fixing the vibration absorber by using the vibration absorber test fixture, performing frequency test on the vibration absorber based on the boundary condition, and obtaining test results include: determining a test excitation input based on a test target; performing frequency test on the vibration absorber in combination with the test excitation input and the boundary condition to obtain first test vibration data of a mounting point of the vibration absorber and second test vibration data of a top end of the vibration absorber; obtaining a vibration absorber frequency response function of the vibration absorber based on the first test vibration data and the second test vibration data; and obtaining a vibration absorber frequency based on the vibration absorber frequency response function.

[0008] Optionally, in an embodiment of the present application, before the performing frequency test on the vibration absorber in combination with the test excitation input and the boundary condition, the method further includes: determining a target test environment temperature based on the test target; judging whether the vibration absorber meets a preset temperature condition based on the target test environment temperature and a current temperature of the vibration absorber; and performing a preset temperature stabilization process on the vibration absorber until the preset temperature condition is met if the vibration absorber does not meet the preset temperature condition.

[0009] Optionally, in an embodiment of the present application, the method further includes: constructing a frequency-temperature relationship curve of the vibration absorber by using the vibration absorber frequency and the target test environment temperature; and evaluating temperature sensitivity of the vibration absorber by using the frequency-temperature relationship curve.

[0010] The second aspect embodiment of the present application provides a low-frequency vibration absorber frequency bench test device, which includes: an acquisition module configured to acquire test data of a vibration absorber of a vehicle under a driving condition and construct boundary conditions of the vibration absorber by using the test data; a first construction module configured to construct a vibration absorber test fixture meeting a preset design condition of the vibration absorber; and a test module configured to fix the vibration absorber by using the vibration absorber test fixture, perform frequency test on the vibration absorber based on the boundary condition, and obtain test results.

[0011] Optionally, in an embodiment of the present application, the acquisition module includes: a first acquisition unit configured to acquire vibration data at a mounting position of the vibration absorber and temperature data in the test data; and a second acquisition unit configured to obtain excitation data in the test data of the vibration absorber based on the vibration data.

[0012] Optionally, in an embodiment of the present application, the first constructing module comprises: a first constructing unit configured to construct a vibration absorber test fixture model based on the frequency condition constraint of the vibration absorber and the test bench connection interface constraint; an analyzing unit configured to perform modal analysis on the vibration absorber test fixture model to obtain an analysis result; and a second constructing unit configured to optimize the vibration absorber test fixture model based on the analysis result and a preset model eligibility condition to obtain an actual vibration absorber test fixture model, and obtain the vibration absorber test fixture based on the actual vibration absorber test fixture model.

[0013] Optionally, in an embodiment of the present application, the test module comprises: a first determining unit configured to determine a test excitation input based on a test target; a test unit configured to perform frequency test on the vibration absorber in combination with the test excitation input and the boundary condition to obtain first test vibration data of a mounting point of the vibration absorber and second test vibration data of a top end of the vibration absorber; a third obtaining unit configured to obtain a vibration absorber frequency response function of the vibration absorber based on the first test vibration data and the second test vibration data; and a fourth obtaining unit configured to obtain a vibration absorber frequency based on the vibration absorber frequency response function.

[0014] Optionally, in an embodiment of the present application, the test module further comprises: a second determining unit configured to determine a target test environment temperature based on the test target; a judging unit configured to judge whether the vibration absorber meets a preset temperature condition based on the target test environment temperature and a current temperature of the vibration absorber; and a processing unit configured to perform preset temperature stabilization processing on the vibration absorber until the preset temperature condition is met in a case where the preset temperature condition is not met.

[0015] Optionally, in an embodiment of the present application, the test module further comprises: a second constructing module configured to construct a frequency-temperature relationship curve of the vibration absorber by using the vibration absorber frequency and the target test environment temperature; and an evaluation module configured to evaluate temperature sensitivity of the vibration absorber by using the frequency-temperature relationship curve.

[0016] An electronic device is provided in a third aspect of the present application, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the program to implement the low-frequency vibration absorber frequency test bench test method as described in the above embodiments.

[0017] A computer readable storage medium is provided in a fourth aspect of the present application, which stores computer instructions for causing the computer to execute the low-frequency vibration absorber frequency test bench test method as described in the above embodiments.

[0018] The fifth aspect of the present application provides a computer program product comprising a computer program, which, when executed, is configured to implement the low-frequency vibration absorber frequency bench test method as described above.

[0019] The embodiments of the present application can construct the boundary condition of the vibration absorber according to the test data of the vibration absorber under the driving condition of the vehicle, construct the vibration absorber test tooling fixture meeting the preset design condition of the vibration absorber, fix the vibration absorber by using the vibration absorber test tooling fixture, and perform the frequency test on the vibration absorber based on the boundary condition to obtain the test result. By considering the use boundary of the vibration absorber, the actual vibration absorber data and the design standard are used to construct the corresponding bench, the frequency of the vibration absorber can be more accurately tested, the actual performance of the vibration absorber is determined, and the work efficiency is improved. Therefore, the technical problem that in the related art, the factors affecting the frequency test of the vibration absorber are not constrained, the test result does not match the expected result, and the performance of the vibration absorber is difficult to accurately characterize is solved.

[0020] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein: Figure 1 A curve diagram of rubber suspension stiffness changing with excitation amplitude according to an embodiment of the present application is provided; Figure 2 A flowchart of a low-frequency vibration absorber frequency bench test method according to an embodiment of the present application is provided; Figure 3 A curve diagram of vibration absorber frequency test error VS frequency ratio and mass ratio according to an embodiment of the present application is provided; Figure 4 A curve diagram of vibration absorber frequency test error VS frequency ratio and mass ratio according to another embodiment of the present application is provided; Figure 5 A flowchart of a low-frequency vibration absorber frequency bench test method according to an embodiment of the present application is provided; Figure 6 A structural diagram of a low-frequency vibration absorber frequency bench test device according to an embodiment of the present application is provided; Figure 7 A structural diagram of an electronic device according to an embodiment of the present application is provided. DETAILED DESCRIPTION

[0022] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0023] The low-frequency vibration absorber frequency bench test method, device, electronic equipment and medium of the embodiments of the present application are described below with reference to the accompanying drawings. In view of the technical problems in the related art mentioned in the background art, the factors affecting the test frequency of the vibration absorber are not constrained, so that the test result does not match the expected result, and it is difficult to accurately characterize the performance of the vibration absorber. The present application provides a low-frequency vibration absorber frequency bench test method, in which the boundary conditions of the vibration absorber can be constructed according to the test data of the vibration absorber under the driving conditions of the vehicle, and the vibration absorber test tooling fixture that meets the preset design conditions of the vibration absorber is constructed, so that the vibration absorber is fixed by the vibration absorber test tooling fixture, and the frequency of the vibration absorber is tested based on the boundary conditions to obtain the test result. By considering the use boundary of the vibration absorber, the actual vibration absorber data and the design standard are constructed accordingly, the frequency of the vibration absorber can be tested more accurately, the actual performance of the vibration absorber can be determined, and the work efficiency is improved. Thus, the technical problem that the factors affecting the test frequency of the vibration absorber are not constrained in the related art, so that the test result does not match the expected result, and it is difficult to accurately characterize the performance of the vibration absorber is solved.

[0024] It can be understood that there are many narrow-band NVH problems in the development process of a vehicle NVH, and due to engineering conditions such as layout space and period, we cannot directly change the structure in many cases, at which time the vibration absorber is a good solution.

[0025] As shown in Figure 1 The automobile vibration absorber is composed of rubber and metal counterweight, in which the rubber part provides the system stiffness performance, which is greatly affected by the use environment temperature and excitation amplitude. With the increase of excitation amplitude, the rubber stiffness decreases, showing nonlinear characteristics, which will cause the frequency change of the vibration absorber.

[0026] The vibration absorber is an auxiliary subsystem attached to the structure (generally referred to as the main structure) that needs to be damped, which can distribute the excitation energy of the vibration source to the main structure and the auxiliary system, and minimize the energy distributed to the main structure, so as to achieve the purpose of structural damping. The vibration absorber is used to control vibration by transferring the energy of the vibration system. Therefore, the vibration absorber is widely used in automobiles, such as steering wheel, subframe, main reducer, drive half shaft, power assembly, exhaust pipe, and body sheet metal parts. According to the frequency of the problem and the structure that causes the problem, the frequency of the vibration absorber used will be different. Generally, the frequency of the steering wheel vibration absorber is between 20-50Hz, the frequency of the seat vibration absorber is near tens of hertz, the frequency of the vibration absorber used in the back door, roof, subframe and main reducer is below 100Hz, and the frequency of the power assembly suspension bracket is generally higher, which can reach hundreds of hertz. The vibration absorber used in automobiles is mainly composed of rubber parts and metal masses. The stiffness performance of the rubber parts is greatly affected by the use environment, such as temperature, excitation frequency and amplitude. With the increase of excitation amplitude, the dynamic stiffness of the rubber decreases and shows a nonlinear state. Therefore, special attention should be paid to the use environment of the vibration absorber.

[0027] Currently, the frequency test method of the vibration absorber has great differences, and no unified test method has been formed, which leads to great differences in test results between the main machine factory and the supplier. When matching the vibration absorber and the vibration absorber frequency OTS recognition, it will be repeated, which is low in efficiency. The main reason is that the factors affecting the test frequency of the vibration absorber are not constrained, including the influence of different excitation amplitudes, different environmental temperatures and modal coupling between the vibration absorber and the fixture on the test results of the vibration absorber frequency: For example, in the related art, a vibration absorber frequency test fixture is designed, and the vibration absorber frequency test method is specified. The advantages of the bench device and method are simple structure and formation of a unified test fixture. However, the force hammer method used in the test method does not consider the amplitude variation characteristics of the rubber part of the vibration absorber with the excitation size. Different excitation amplitudes have a negligible effect on the frequency of the vibration absorber. Secondly, the test method does not consider the influence of the stiffness of the rubber part of the vibration absorber on the use environment temperature, and the repeatability of the test method is not high. Finally, although the test fixture is unified, the influence of the modal frequency of the fixture on the test results of the vibration absorber frequency is not considered. Therefore, the method cannot accurately test the natural frequency of the vibration absorber.

[0028] For another example, in another related art, the boundary conditions that affect the vibration frequency of the dynamic vibration absorber are proposed: the excitation force size and the working temperature, and a detailed test method is given. However, it does not consider the influence of the modal frequency of the fixture on the test frequency of the vibration absorber itself.

[0029] To solve the above technical problems, the low-frequency vibration absorber frequency bench test method provided by the embodiment of the application can consider the use boundary of the vibration absorber, construct a corresponding bench according to the actual vibration absorber data and design standards, more accurately test the frequency of the vibration absorber, determine the actual performance of the vibration absorber, and improve the work efficiency.

[0030] Specifically, Figure 2 A flowchart of a low-frequency vibration absorber frequency bench test method provided by the embodiment of the application is shown.

[0031] As Figure 2 shown, the low-frequency vibration absorber frequency bench test method includes the following steps: In step S201, test data of the vibration absorber of the vehicle under the driving condition is obtained, and the boundary conditions of the vibration absorber are constructed by using the test data.

[0032] The embodiment of the application can first perform real vehicle testing to obtain test data, and construct boundary conditions for subsequent bench testing by combining the test data and the design parameters of the vibration absorber.

[0033] The boundary condition can be understood as the restriction and constraint of the surrounding environment on the object when the object is moving. In the embodiment of the application, the vibration characteristics of the vibration absorber are affected by the installation method, and the boundary conditions, including the structure conditions and the test data conditions, are used for subsequent bench testing.

[0034] Optionally, in an embodiment of the application, obtaining the test data of the vibration absorber of the vehicle under the driving condition includes: obtaining vibration data and temperature data in the test data at the installation position of the vibration absorber; and obtaining excitation data in the test data of the vibration absorber based on the vibration data.

[0035] The embodiment of the application can arrange acceleration and temperature sensors at the installation position of the vibration absorber of the vehicle, test the use excitation direction, size and environmental temperature of the vibration absorber, and obtain the design frequency of the vibration absorber according to the design technical requirements.

[0036] In step S202, a vibration absorber test tool clamp meeting the preset design conditions of the vibration absorber is constructed.

[0037] Further, the embodiment of the application can design the tool clamp used for bench testing according to the design conditions. The design conditions can include a structure size condition of the vibration absorber test tool clamp determined based on the structure parameters of the vibration absorber, a structure size condition of the vibration absorber test tool clamp determined based on the influencing factors of the vibration absorber test, and the like, so as to guarantee the clamping stability and avoid the influence of other factors on the test results.

[0038] Optionally, in an embodiment of the present application, a vibration absorber test tooling fixture meeting preset design conditions of the vibration absorber is constructed, including: constructing a vibration absorber test tooling fixture model based on frequency condition constraints of the vibration absorber and test bench connection interface constraints; performing modal analysis on the vibration absorber test tooling fixture model to obtain an analysis result; optimizing the vibration absorber test tooling fixture model based on the analysis result and preset model qualification conditions to obtain an actual vibration absorber test tooling fixture model, and obtaining the vibration absorber test tooling fixture based on the actual vibration absorber test tooling fixture model.

[0039] In actual implementation, in an embodiment of the present application, a vibration absorber test tooling fixture model can be constructed according to frequency requirements of the vibration absorber and test bench connection interfaces, and further, the vibration absorber test tooling fixture model can be subjected to modal analysis and optimization, with a requirement that a modal frequency of the tooling fixture is separated from a design frequency of the vibration absorber, and the modal frequency of the tooling fixture is at least 3 times the design frequency of the vibration absorber, and a mass ratio of the tooling fixture to the vibration absorber is greater than or equal to 2. The specific frequency interval and test error can be as shown in Figure 3 and Figure 4 .

[0040] For the vibration absorber test tooling fixture model meeting the above requirements, an embodiment of the present application can construct a vibration absorber test tooling fixture for frequency testing of the vibration absorber.

[0041] In step S203, the vibration absorber is fixed by using the vibration absorber test tooling fixture, and frequency testing of the vibration absorber is performed based on boundary conditions to obtain a test result.

[0042] An embodiment of the present application can fix the vibration absorber by using the vibration absorber test tooling fixture, and perform frequency testing of the vibration absorber based on boundary conditions according to a platform method to obtain a test result.

[0043] Optionally, in an embodiment of the present application, the vibration absorber is fixed by using the vibration absorber test tooling fixture, and frequency testing of the vibration absorber is performed based on boundary conditions to obtain a test result, including: determining a test excitation input based on a test target; performing frequency testing of the vibration absorber in combination with the test excitation input and the boundary conditions to obtain first test vibration data of a mounting point of the vibration absorber and second test vibration data of a top end of the vibration absorber; obtaining a vibration absorber frequency response function of the vibration absorber based on the first test vibration data and the second test vibration data; and obtaining a vibration absorber frequency of the vibration absorber based on the vibration absorber frequency response function.

[0044] An embodiment of the present application can arrange acceleration sensors at the mounting point of the vibration absorber and the top end of the vibration absorber to obtain the first test vibration data of the mounting point of the vibration absorber and the second test vibration data of the top end of the vibration absorber.

[0045] Before actual testing, the embodiment of the present application can obtain the test target, that is, whether the test is a test with excitation as a variable or a test with temperature as a variable. In the test with excitation as a variable, the embodiment of the present application can obtain different excitation inputs that need to be measured multiple times under the constraint of boundary conditions, and then obtain first test vibration data and second test vibration data under different excitation inputs through the acceleration sensor.

[0046] According to the first test vibration data and the second test vibration data, the embodiment of the present application can obtain the frequency response function of the vibration absorber, and obtain the frequency of the vibration absorber through the peak value of the frequency response function.

[0047] Optionally, in an embodiment of the present application, before the frequency test of the vibration absorber is performed in combination with the test excitation input and the boundary condition, the method further includes: determining a target test environment temperature based on the test target; judging whether the vibration absorber meets a preset temperature condition based on the target test environment temperature and a current temperature of the vibration absorber; and performing a preset temperature stabilization process on the vibration absorber until the preset temperature condition is met, if the preset temperature condition is not met.

[0048] The embodiment of the present application can also perform the frequency test of the vibration absorber based on different target test environment temperatures under the constraint of the boundary condition. Before the test is performed, the embodiment of the present application can first judge whether the current temperature of the vibration absorber is consistent with the target test environment temperature. If not, the embodiment of the present application can place the vibration absorber in a temperature control box for more than 4 hours, and then start the test.

[0049] Optionally, in an embodiment of the present application, the method further includes: constructing a frequency-temperature relationship curve of the vibration absorber by using the frequency of the vibration absorber and the target test environment temperature; and evaluating the temperature sensitivity of the vibration absorber by using the frequency-temperature relationship curve.

[0050] The embodiment of the present application can construct the frequency-temperature relationship curve of the vibration absorber according to the data obtained by the test, and then determine the influence of temperature on the vibration absorber, so as to determine whether the vibration absorber needs to be optimized according to the temperature characteristics of the vibration absorber in the future, or to select the vibration absorber corresponding to the temperature interval when the vehicle in different environmental regions is produced.

[0051] In combination Figure 5 with FIG. 1, the working principle of the low-frequency vibration absorber frequency bench test method of the embodiment of the present application is described in detail.

[0052] As Figure 5 shown, the embodiment of the present application can include the following steps: Step S1, obtain the vibration absorber test boundary condition: respectively arrange the acceleration and temperature sensors at the vibration absorber installation position of the vehicle, test the use excitation direction, size and environmental temperature of the vibration absorber, and obtain the design frequency of the vibration absorber according to the design technical requirement.

[0053] Step S2, fixture tool 3D design: design the tool fixture used for bench test according to the vibration absorber frequency requirement and the bench test connection interface, that is, the vibration absorber test tool fixture.

[0054] Step S3, tool fixture modal analysis and optimization: perform modal analysis and optimization on the tool fixture designed in step S2, require that the tool fixture modal frequency is separated from the vibration absorber design frequency, and require that the tool fixture modal frequency is at least 3 times the vibration absorber design frequency, and at the same time, the tool fixture mass is greater than or equal to 2 times the vibration absorber mass.

[0055] Step S4, vibration absorber frequency test: fix the vibration absorber with the tool fixture in step S3, arrange acceleration sensors at the vibration absorber installation point and the top end of the vibration absorber, perform frequency test on the vibration absorber according to the platform method according to the boundary condition obtained in step S1, and obtain the excitation input of the vibration absorber and the frequency response function of the vibration absorber, respectively. When the working environmental temperature of the vibration absorber is different from the test environment, the vibration absorber needs to be placed in the temperature control box for more than 4 hours before the test.

[0056] Step S5, result post-processing: obtain the vibration absorber frequency according to the peak value of the frequency response function tested in step S4.

[0057] The low-frequency vibration absorber frequency bench test method according to the embodiments of the present application can construct the boundary condition of the vibration absorber according to the test data of the vibration absorber of the vehicle under the driving condition, construct the vibration absorber test tool fixture that meets the preset design condition of the vibration absorber, thereby fix the vibration absorber with the vibration absorber test tool fixture, and perform frequency test on the vibration absorber based on the boundary condition to obtain the test result. By considering the use boundary of the vibration absorber, the actual vibration absorber data and the design standard are used for corresponding bench construction, the frequency of the vibration absorber can be more accurately tested, the actual performance of the vibration absorber is determined, and the work efficiency is improved. Therefore, the technical problem that in the related art, the factors affecting the test frequency of the vibration absorber are not constrained, the test result does not match the expected result, and the performance of the vibration absorber is difficult to accurately characterize is solved.

[0058] Secondly, the low-frequency vibration absorber frequency bench test device according to the embodiments of the present application is described with reference to the accompanying drawings.

[0059] Figure 6 is a block schematic diagram of the low-frequency vibration absorber frequency bench test device according to the embodiments of the present application.

[0060] As Figure 6As shown, the low-frequency vibration absorber frequency bench test device 10 comprises an acquisition module 100, a first construction module 200 and a test module 300.

[0061] Specifically, the acquisition module 100 is configured to acquire test data of the vibration absorber under a driving condition of the vehicle, and construct boundary conditions of the vibration absorber by using the test data.

[0062] The first construction module 200 is configured to construct a vibration absorber test tooling fixture meeting preset design conditions of the vibration absorber.

[0063] The test module 300 is configured to fix the vibration absorber by using the vibration absorber test tooling fixture, perform frequency test on the vibration absorber based on the boundary conditions, and obtain test results.

[0064] Optionally, in an embodiment of the present application, the acquisition module 100 comprises a first acquisition unit and a second acquisition unit.

[0065] The first acquisition unit is configured to acquire vibration data and temperature data in the test data at a mounting position of the vibration absorber.

[0066] The second acquisition unit is configured to obtain excitation data in the test data of the vibration absorber based on the vibration data.

[0067] Optionally, in an embodiment of the present application, the first construction module 200 comprises a first construction unit, an analysis unit and a second construction unit.

[0068] The first construction unit is configured to construct a vibration absorber test tooling fixture model based on frequency condition constraints of the vibration absorber and bench test connection interface constraints.

[0069] The analysis unit is configured to perform modal analysis on the vibration absorber test tooling fixture model to obtain analysis results.

[0070] The second construction unit is configured to optimize the vibration absorber test tooling fixture model based on the analysis results and preset model qualification conditions, obtain an actual vibration absorber test tooling fixture model, and obtain the vibration absorber test tooling fixture based on the actual vibration absorber test tooling fixture model.

[0071] Optionally, in an embodiment of the present application, the test module 300 comprises a first determination unit, a test unit, a third acquisition unit and a fourth acquisition unit.

[0072] The first determination unit is configured to determine a test excitation input based on a test target.

[0073] The test unit is configured to perform frequency test on the vibration absorber in combination with the test excitation input and the boundary conditions, to acquire first test vibration data of a mounting point of the vibration absorber and second test vibration data of a top end of the vibration absorber.

[0074] The third obtaining unit is configured to obtain a frequency response function of the vibration absorber based on the first test vibration data and the second test vibration data.

[0075] The fourth obtaining unit is configured to obtain a frequency of the vibration absorber based on the frequency response function of the vibration absorber.

[0076] Optionally, in an embodiment of the present application, the test module 300 further comprises a second determining unit, a judging unit and a processing unit.

[0077] The second determining unit is configured to determine a target test environment temperature based on the test target.

[0078] The judging unit is configured to determine whether the vibration absorber meets a preset temperature condition based on the target test environment temperature and a current temperature of the vibration absorber.

[0079] The processing unit is configured to perform a preset temperature stabilization process on the vibration absorber until the preset temperature condition is met, in a case where the preset temperature condition is not met.

[0080] Optionally, in an embodiment of the present application, the test module 300 further comprises: The second constructing module is configured to construct a frequency-temperature relationship curve of the vibration absorber by using the frequency of the vibration absorber and the target test environment temperature.

[0081] The evaluation module is configured to evaluate temperature sensitivity of the vibration absorber by using the frequency-temperature relationship curve.

[0082] It should be noted that the foregoing explanation and description of the embodiment of the low-frequency vibration absorber frequency bench test method also applies to the low-frequency vibration absorber frequency bench test device of the embodiment, which will not be described here again.

[0083] The low-frequency vibration absorber frequency bench test device according to the embodiment of the present application can construct a boundary condition of the vibration absorber according to test data of the vibration absorber under a driving condition of a vehicle, construct a vibration absorber test tooling fixture that meets a preset design condition of the vibration absorber, thereby fixing the vibration absorber by using the vibration absorber test tooling fixture, and performing frequency test on the vibration absorber based on the boundary condition to obtain a test result. By considering the use boundary of the vibration absorber, corresponding bench construction is performed for actual vibration absorber data and design standards, so that the frequency of the vibration absorber can be more accurately tested, the actual performance of the vibration absorber can be determined, and the work efficiency can be improved. Thus, the technical problem that, in the related art, factors affecting the test frequency of the vibration absorber are not constrained, the test result does not match the expected result, and the performance of the vibration absorber is difficult to accurately characterize is solved.

[0084] Figure 7 A structural schematic diagram of an electronic device is provided for the embodiment of the present application. The electronic device can comprise: The memory 701, the processor 702 and the computer program stored in the memory 701 and executable on the processor 702.

[0085] The processor 702 implements the low-frequency vibration absorber frequency bench test method provided in the above embodiments when executing the program.

[0086] Further, the electronic device further comprises: The communication interface 703 is configured to communicate between the memory 701 and the processor 702.

[0087] The memory 701 is configured to store the computer program executable on the processor 702.

[0088] The memory 701 can include a high-speed RAM memory, and can also include a non-volatile memory, for example, at least one disk memory.

[0089] If the memory 701, the processor 702 and the communication interface 703 are independently implemented, the communication interface 703, the memory 701 and the processor 702 can be connected to each other through a bus and complete the communication between each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 7 In the figure, only one thick line is used to represent, but it does not mean that there is only one bus or one type of bus.

[0090] Optionally, in a specific implementation, if the memory 701, the processor 702 and the communication interface 703 are integrated on a chip, the memory 701, the processor 702 and the communication interface 703 can complete the communication between each other through an internal interface.

[0091] The processor 702 can be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement one or more embodiments of the present application.

[0092] The embodiment also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the low-frequency vibration absorber frequency bench test method.

[0093] The embodiment of the application also provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to implement the low-frequency vibration absorber frequency bench test method provided by the embodiment of the application.

[0094] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or N embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0095] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "N" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0096] Any process or method descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for performing a specified logic function or process, and the various embodiments of the application contemplate that the modules, segments, or portions of code may be implemented in hardware, software, or a combination of both. Preferably, the various embodiments of the application are implemented as computer programs or program modules.

[0097] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0098] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0099] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0100] In addition, each of the functional units in the various embodiments of the present application can be integrated in one processing module, or each of the units can be physically present separately, or two or more units can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0101] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method of low frequency shaker frequency bench testing, characterized by, The method comprises the following steps: obtaining test data of the vibration absorber under a driving condition of a vehicle, and constructing boundary conditions of the vibration absorber by using the test data; constructing a vibration absorber test tooling fixture meeting preset design conditions of the vibration absorber; fixing the vibration absorber by using the vibration absorber test tooling fixture, performing frequency testing on the vibration absorber based on the boundary conditions, and obtaining test results.

2. The method of claim 1, wherein, The obtaining of the test data of the vibration absorber under the driving condition of the vehicle comprises: obtaining vibration data at a mounting position of the vibration absorber and temperature data in the test data; obtaining excitation data in the test data of the vibration absorber based on the vibration data.

3. The method of claim 1, wherein, The construction of the vibration absorber test tooling fixture meeting the preset design conditions of the vibration absorber comprises: constructing a vibration absorber test tooling fixture model based on frequency condition constraints and bench test connection interface constraints of the vibration absorber; performing modal analysis on the vibration absorber test tooling fixture model to obtain analysis results; optimizing the vibration absorber test tooling fixture model based on the analysis results and preset model qualification conditions to obtain an actual vibration absorber test tooling fixture model, and obtaining the vibration absorber test tooling fixture based on the actual vibration absorber test tooling fixture model.

4. The method of claim 1, wherein, The fixing of the vibration absorber by using the vibration absorber test tooling fixture, the frequency testing on the vibration absorber based on the boundary conditions, and the obtaining of the test results comprise: determining a test excitation input based on a test target; performing frequency testing on the vibration absorber in combination with the test excitation input and the boundary conditions to obtain first test vibration data of a mounting point of the vibration absorber and second test vibration data of a top end of the vibration absorber; obtaining a vibration absorber frequency response function of the vibration absorber based on the first test vibration data and the second test vibration data; obtaining a vibration absorber frequency based on the vibration absorber frequency response function.

5. The method of claim 4, wherein, Before the frequency testing on the vibration absorber in combination with the test excitation input and the boundary conditions, the method further comprises: determining a target test environment temperature based on the test target; judging whether the vibration absorber meets a preset temperature condition based on the target test environment temperature and a current temperature of the vibration absorber; if the preset temperature condition is not met, performing preset temperature stabilization processing on the vibration absorber until the preset temperature condition is met.

6. The method of claim 5, wherein, The method further comprises: constructing a frequency-temperature relationship curve of the vibration absorber by using the vibration absorber frequency and the target test environment temperature; evaluating temperature sensitivity of the vibration absorber by using the frequency-temperature relationship curve.

7. A low frequency shunt mount frequency bench test device characterized by, The method comprises: an obtaining module, configured to obtain test data of a vibration absorber under a driving condition of a vehicle, and construct boundary conditions of the vibration absorber by using the test data; a constructing module, configured to construct a vibration absorber test tooling fixture meeting preset design conditions of the vibration absorber; a testing module, configured to fix the vibration absorber by using the vibration absorber test tooling fixture, perform frequency testing on the vibration absorber based on the boundary conditions, and obtain test results.

8. An electronic device, comprising: The method comprises: - a memory, a processor, and a computer program stored on the memory and runable on the processor, the processor executing the program to implement the low frequency absorber frequency rig test method of any one of claims 1-6.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by a processor for implementing the low frequency absorber frequency rig test method of any one of claims 1-6.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed for implementing the low frequency absorber frequency rig test method of any one of claims 1-6.

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