CN112229654B - Plate spring test method, device, electronic equipment and computer readable medium - Google Patents
Plate spring test method, device, electronic equipment and computer readable medium Download PDFInfo
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- CN112229654B CN112229654B CN202011070042.4A CN202011070042A CN112229654B CN 112229654 B CN112229654 B CN 112229654B CN 202011070042 A CN202011070042 A CN 202011070042A CN 112229654 B CN112229654 B CN 112229654B
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a plate spring test method, a device, electronic equipment and a computer readable medium, which relate to the technical field of plate spring tests and comprise the following steps: acquiring a target load signal of an automobile plate spring under a use working condition; converting the target load signal into a plurality of sets of block spectrum target signals; the block spectrum target signals comprise first class block spectrum target signals corresponding to load signals larger than a fatigue limit and second class block spectrum target signals corresponding to fretting wear load signals smaller than the fatigue limit; determining a loading signal through an automobile plate spring test and a block spectrum target signal; compiling a cyclic signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring; the cyclic signal is used for loading the plate spring test system to carry out plate spring test. The invention can truly reproduce the load state born by the plate spring in actual use and the generated actual effect mode in the test, and obtain the true service life result.
Description
Technical Field
The invention relates to the technical field of plate spring tests, in particular to a plate spring test method and device, electronic equipment and a computer readable medium.
Background
The steel plate spring suspension system is the most widely applied suspension system in a commercial vehicle suspension system, bears the functions of bearing, guiding, damping and the like, and is of great importance to the technical performance and safety performance of the whole vehicle.
By analyzing the position load signal of the leaf spring during the running process of the vehicle, 70% -90% of load is lower than the fatigue limit of the leaf spring material and is generally ignored during the loading process. However, this partial load causes fretting between the leaf springs or between the leaf spring and the spacer. Fretting wear refers to that small relative slippage occurs between the contact surfaces due to low-amplitude vibration between the contact surfaces, and the existence of fretting wear can reduce the service life of the plate spring by 30-80%.
However, in the prior art, the automobile plate spring test is generally a durability test or the like with a constant amplitude or a load spectrum according to an industry standard. The test method has poor correlation between the test load, the failure mode and the like and the actual situation, and the real fatigue life of the automobile leaf spring is difficult to obtain.
Disclosure of Invention
The invention aims to provide a leaf spring test method, a leaf spring test device, electronic equipment and a computer readable medium, which can truly reproduce the load state born by a leaf spring in actual use and the generated actual effect mode during test and obtain a real life result.
In a first aspect, the present invention provides a leaf spring testing method, including:
acquiring a target load signal of an automobile plate spring under a use working condition;
converting the target load signal into a plurality of sets of block spectrum target signals; the block spectrum target signals comprise first class block spectrum target signals corresponding to load signals larger than a fatigue limit and second class block spectrum target signals corresponding to fretting wear load signals smaller than the fatigue limit;
determining a loading signal through an automobile plate spring test and the block spectrum target signal;
compiling a cyclic signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring; the cyclic signal is used for loading a plate spring test system to carry out a plate spring test.
In an alternative embodiment, the target payload signal is converted into a plurality of sets of block spectrum target signals; the method comprises the following steps of obtaining a block spectrum target signal, wherein the block spectrum target signal comprises a first class of block spectrum signal corresponding to a load signal larger than a fatigue limit and a second class of block spectrum signal corresponding to a fretting wear load signal smaller than the fatigue limit, and the method comprises the following steps:
and arranging the fatigue limit load signals into at least one group of first class block spectrum signals, and arranging the fretting wear load signals into at least one group of second class block spectrum signals according to an equivalent mode of an accumulated PV value.
In an alternative embodiment, the first class of block spectral signals are transformed based on lesion equivalence.
In an alternative embodiment, the second type of block spectrum signals are based on the principle of cumulative PV value equivalence mode, wherein the PV value is in the form of a speed-load product and the PV value is equivalent to a PV-cumulative sum of the products of load and speed below the fatigue limit in the target load signal and the second type of block spectrum signals.
In an alternative embodiment, determining the loading signal from the automobile leaf spring test and the block spectrum target signal comprises:
driving an automobile plate spring test system by adopting a white noise block spectrum signal to obtain a response signal of an automobile plate spring;
determining a frequency response function and a transfer function according to the response signal and the white noise block spectrum signal;
and determining a loading signal step by step through iteration of the block spectrum target signal, the frequency response function and the transfer function.
In a second aspect, the present invention provides a leaf spring testing apparatus, including:
the acquisition module is used for acquiring a target load signal of the automobile plate spring under the use working condition;
the conversion module is used for converting the target load signal into a plurality of groups of block spectrum target signals; the block spectrum target signals comprise first class block spectrum target signals corresponding to load signals larger than a fatigue limit and second class block spectrum target signals corresponding to fretting wear load signals smaller than the fatigue limit;
the determining module is used for determining a loading signal through an automobile plate spring test and the block spectrum target signal;
the compiling module is used for compiling a cyclic signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring; the cyclic signal is used for loading a plate spring test system to carry out a plate spring test.
In an alternative embodiment, the conversion module comprises:
and arranging the fatigue limit load signals into at least one group of first class block spectrum signals, and arranging the fretting wear load signals into at least one group of second class block spectrum signals according to an equivalent mode of an accumulated PV value.
In an alternative embodiment, the second type of block spectrum signals are based on the principle of cumulative PV value equivalence mode, where the PV value is in the form of a speed multiplied by a load, and the PV value equivalence is the sum of the products of load multiplied by speed below the fatigue limit in the target load signal and the PV sum equivalence of the second type of block spectrum signals.
In a third aspect, embodiments provide an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method of any one of the foregoing embodiments when executing the computer program.
In a fourth aspect, embodiments provide a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the method of any of the preceding embodiments.
According to the plate spring test method, the device, the electronic equipment and the computer readable medium, the target load signal of the automobile plate spring under the working condition is obtained, and the target load signal is converted into the multi-block spectrum target signal; and then determining a loading signal by combining a plurality of block spectrum target signals through a plate spring test, thereby compiling a circulating signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring. When the target load signal is converted into the multiple block spectrum target signals, the block spectrum target signals comprise a first class block spectrum target signal corresponding to a load signal larger than a fatigue limit and a second class block spectrum target signal corresponding to a fretting wear load signal smaller than the fatigue limit, so that the condition of fretting wear or fretting fatigue caused by a load lower than the fatigue limit is considered for the multiple block spectrum target signals, a fatigue test performed by adopting a circularly compiled signal obtained on the basis is closer to a real condition, the load state born by the plate spring in actual use and a generated actual effect mode are truly reproduced, and a real life result is obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a leaf spring testing method provided by an embodiment of the present invention;
FIG. 2 is a schematic signal processing diagram of a leaf spring testing method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a leaf spring testing apparatus provided by an embodiment of the invention;
fig. 4 is a schematic diagram of an electronic device according to an embodiment of the present invention.
An icon: 31-an acquisition module; 32-a conversion module; 33-a determination module; 34-a compiling module; 400-an electronic device; 401 — a communication interface; 402-a processor; 403-a memory; 404-bus.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The steel plate spring suspension system is the most widely applied suspension system in a commercial vehicle suspension system, bears the functions of bearing, guiding, damping and the like, and is of great importance to the technical performance and safety performance of the whole vehicle.
However, in the prior art, the automobile plate spring test is generally a durability test or the like with a constant amplitude or a load spectrum according to an industry standard. The test method has poor correlation between the test load, the failure mode and the like and the actual situation, and the real fatigue life of the automobile leaf spring is difficult to obtain. In addition, the automobile plate spring testing device in the prior art is difficult to adjust, is only suitable for plate springs with similar sizes and types, and has a small application range.
Moreover, the correlation between the constant-amplitude loading failure mode and the actual situation is poor, and the load spectrum loading is adopted, so that the correlation of the failure mode is improved, but the decoupling control is difficult.
For example, the invention patents 201410127747.3 and 201610401914.8 provide two test methods, and in the aspect of test loading, constant-amplitude loading can be adopted or accelerated loading can be carried out on a load spectrum acquisition signal processed into a larger signal. The method can apply three-way load, and has great progress in the aspect of durability test of the plate spring, but all the existing methods adopt the mode of neglecting a small load part to obtain test acceleration, but the method has obvious theoretical defects, and the failure mode cannot be correlated with the actual condition poorly.
By analyzing the position load signal of the leaf spring during the running process of the vehicle, 70% -90% of load is lower than the fatigue limit of the leaf spring material and is generally ignored during the loading process. However, this partial load causes fretting between the leaf springs or between the leaf spring and the spacer. Fretting wear refers to that small relative slippage occurs between contact surfaces due to low-amplitude vibration between the contact surfaces, and the existence of fretting wear can reduce the service life of a plate spring by 30-80%.
Based on the method, the device, the electronic equipment and the computer readable medium, the working condition characteristics and the failure mode of the plate spring in the use process are considered systematically, the load state born by the plate spring in the actual use and the generated actual effect mode can be truly reproduced in the test, and the actual service life result is obtained; the present invention is illustrated in detail by the following examples.
Referring to fig. 1, the plate spring testing method provided in this embodiment includes the following steps:
s110, acquiring a target load signal of the automobile plate spring under the use working condition;
in the step, a first sensor is arranged on the automobile plate spring, the output signal of the first sensor under the working condition of the automobile is collected, and the output signal of the first sensor is subjected to resampling and low-pass filtering processing to obtain a target load signal.
S120, converting the target load signals into multiple groups of block spectrum target signals, wherein the block spectrum target signals comprise first class block spectrum target signals corresponding to load signals larger than a fatigue limit and second class block spectrum target signals corresponding to fretting wear load signals smaller than the fatigue limit;
in the step, firstly, a target load signal is arranged into a plurality of groups of large block spectrum target signals, namely a first class of block spectrum target signals according to a fatigue damage equivalence principle; for example, the fatigue limit load, 0.8 times the fatigue limit load, and 0.6 times the fatigue limit load may be selected. Secondly, carrying out data processing on the part of the load below the fatigue limit, and determining a second type of block spectrum target signal corresponding to the target load signal by taking the load combination with the fatigue limit or less than the fatigue limit as the target load signal; for example, the signals are arranged into multi-block spectrum target loading signals according to the principle of an equivalent mode of the accumulated PV value. Preferably, the number of block spectrum target signals is 3 to 5 groups.
S130, determining a loading signal through an automobile plate spring test and a block spectrum target signal;
in the step, an automobile plate spring test system is built, and an automobile plate spring and a first sensor are installed in the automobile plate spring test system; meanwhile, when the automobile plate spring is installed, the clamping mode of the automobile plate spring is consistent with that of an automobile.
The method comprises the steps of determining a frequency response function and a transfer function through an automobile plate spring test, and determining a loading signal according to the frequency response function, the transfer function and a block spectrum target signal.
S140, compiling a circulating signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring; the cyclic signal is used for loading a plate spring test system to perform a plate spring test.
And (4) according to the block spectrum target signal determined in the step (S120), the loading signal determined in the step (S130), an automobile test system and a preset service life of the plate spring, compiling a cyclic signal. And loading the programmed cyclic signal to an automobile plate spring test system for carrying out an endurance test, and simulating a real load state borne by the plate spring and a generated failure mode.
The present embodiment converts the target load signal into a plurality of block spectrum target signals, wherein the block spectrum target signals include a first type of block spectrum target signal corresponding to a load signal greater than a fatigue limit and a second type of block spectrum target signal corresponding to a fretting wear load signal less than the fatigue limit; therefore, the working condition characteristics and the failure mode of the plate spring in the use process are considered, and when the cyclic signal based on the target signal is loaded to the automobile plate spring test system, the load state borne by the plate spring in use and the generated failure mode can be more truly reproduced, so that the obtained service life result is more true and reliable. In addition, because the real target load signal is converted into a mode of combining a plurality of block spectrum target signals for loading, coupling is not easy to generate, the control is convenient, and the realization is easy.
Further, step S120 of the above embodiment includes the following steps:
and arranging the fatigue limit load signals into at least one group of first class block spectrum signals, and arranging the fretting wear load signals into at least one group of second class block spectrum signals according to an equivalent mode of an accumulated PV value.
Specifically, in this embodiment, the PV value refers to dividing the fretting wear load signal into one or more groups of signals, and sorting each group of signals into a product of speed and load to obtain a PV value corresponding to each group of signals.
Further, the first class block spectral signal is transformed based on the impairment equivalence.
Specifically, the damage equivalence refers to arranging the loads larger than the fatigue limit into one or more groups of large block spectrum signals, namely, the first class block spectrum target signals.
Further, the second type of block spectrum signal is based on the principle of cumulative PV value equivalent mode, wherein the PV value is in the form of a product of speed and load, and the PV value is equivalent to the sum of the products of load and speed less than the fatigue limit in the target load signal and the sum of the PV values of the second type of block spectrum signal.
Specifically, the PV value equivalence is to use the sum of the load less than the fatigue limit multiplied by the speed as the PV value, and then to equate the PV value into one or more sets of the second type block spectrum signals.
Optionally, determining the loading signal by an automobile plate spring test and a block spectrum target signal comprises:
driving an automobile plate spring test system by adopting a white noise block spectrum signal to obtain a response signal of an automobile plate spring;
determining a frequency response function and a transfer function according to the response signal and the white noise block spectrum signal;
and determining the loading signal step by step through iteration of the block spectrum target signal, the frequency response function and the transfer function.
Here, the white noise block spectrum signal is randomly generated, and the loading signal may be determined according to the convolution of the target load signal and the transfer function, or may be obtained by software calculation iteration. The specific iteration method comprises the following steps:
obtaining a first driving signal through convolution operation according to the transfer function and the target load signal;
referring to fig. 2, the principle of the stepwise iteration of the present embodiment is: loading a first driving signal to an automobile plate spring test system to obtain a first feedback signal; calculating a first error between the first feedback signal and the block spectrum target signal, and judging whether the first error is within an acceptance range; if the first error is within the acceptance range, the first driving signal is used as a response signal, otherwise, the first driving signal is modified to obtain a second driving signal;
loading a second driving signal to an automobile plate spring test system to obtain a second feedback signal; calculating a second error between the second feedback signal and the block spectrum target signal; judging whether the second error is within the acceptance range; if the second error is within the acceptance range, the second driving signal is used as a response signal, otherwise, the second error is corrected to obtain a third driving signal;
and repeating the previous step until the error between the obtained response signal and the target signal is within the acceptance range.
The principle of the embodiment is as follows: firstly, acquiring a sensor signal through a first sensor when a whole vehicle working condition test is carried out, and preprocessing the sensor signal to obtain a target load signal; and arranging the target load signals into 3-5 groups of block spectrum target signals. Then, driving an automobile plate spring test system by using a white noise block spectrum signal to obtain a response signal, and calculating a frequency response function and a transfer function; and obtaining a loading signal based on the block spectrum target signal, the frequency response function and the transfer function. And finally, compiling a circulating signal according to the block spectrum target signal, the automobile plate spring test system, the obtained loading signal and the preset service life of the plate spring, and loading.
In the embodiment, while the fatigue damage caused by the load greater than the fatigue limit is considered, the fretting wear or fretting fatigue caused by the load lower than the fatigue limit is also considered, so that the failure mode in the test is basically consistent with the actual mode; the embodiment also obtains the loading load based on an equivalent accumulated PV value mode, so that the loading is carried out by adopting a block spectrum target signal and a combination mode thereof, coupling is not easy to generate, and the method is convenient to control and easy to realize.
Referring to fig. 3, the plate spring testing apparatus provided by the present invention includes:
the acquisition module 31 is used for acquiring a target load signal of the automobile plate spring under the use working condition;
a conversion module 32, configured to convert the target load signal into multiple sets of block spectrum target signals; the block spectrum target signals comprise first class block spectrum target signals corresponding to load signals larger than a fatigue limit and second class block spectrum target signals corresponding to fretting wear load signals smaller than the fatigue limit;
the determining module 33 is used for determining a loading signal through an automobile plate spring test and a block spectrum target signal;
the compiling module 34 is used for compiling a circulating signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring; the cyclic signal is used for loading the plate spring test system to carry out plate spring test.
Optionally, the conversion module 32 comprises:
and arranging the fatigue limit load signals into at least one group of first class block spectrum signals, and arranging the fretting wear load signals into at least one group of second class block spectrum signals according to an equivalent mode of an accumulated PV value.
Preferably, the first class block spectral signals are transformed based on the impairment equivalence.
Preferably, the second type of block spectrum signals are based on the principle of cumulative PV value equivalence mode, wherein the PV value is in the form of a speed and load product, and the PV value equivalence is the sum of the products of the load and the speed below the fatigue limit in the target load signal and the PV sum equivalence of the second type of block spectrum signals.
Further, the determining module 33 includes:
the test module is used for driving the automobile plate spring test system by adopting a white noise block spectrum signal to obtain a response signal of the automobile plate spring;
the first calculation module is used for determining a frequency response function and a transfer function according to the response signal and the white noise block spectrum signal;
and the second calculation module is used for determining a loading signal according to the block spectrum target signal, the frequency response function and the transfer function.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. The plate spring testing device provided by the embodiment of the invention has the same technical characteristics as the plate spring testing method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects are achieved.
Referring to fig. 4, an embodiment of the present invention further provides an electronic device 400, which includes a communication interface 401, a processor 402, a memory 403, and a bus 404, where the processor 402, the communication interface 401, and the memory 403 are connected by the bus 404; the memory 403 is used for storing a computer program for supporting the processor 402 to execute the leaf spring test method, and the processor 402 is configured to execute the program stored in the memory 403.
Optionally, the embodiment of the present invention further provides a computer readable medium having a non-volatile program code executable by the processor 402, wherein the program code causes the processor 402 to execute the leaf spring test method in the above embodiment.
The leaf spring testing method, device and computer program product provided in the embodiments of the present invention include a computer readable storage medium storing program codes, where instructions included in the program codes may be used to execute the method in the foregoing method embodiments, and specific implementation may refer to the method embodiments, which are not described herein again.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A leaf spring testing method, comprising:
acquiring a target load signal of an automobile plate spring under a use working condition;
converting the target load signal into a plurality of sets of block spectrum target signals; the block spectrum target signals comprise first class block spectrum target signals corresponding to load signals larger than a fatigue limit and second class block spectrum target signals corresponding to fretting wear load signals smaller than the fatigue limit;
determining a loading signal through an automobile plate spring test and the block spectrum target signal;
compiling a cyclic signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring; the cyclic signal is used for loading a plate spring test system to perform a plate spring test;
wherein the target load signal is converted into a multi-set of block spectrum target signals; the method comprises the following steps of obtaining a block spectrum target signal, wherein the block spectrum target signal comprises a first type of block spectrum target signal corresponding to a load signal larger than a fatigue limit and a second type of block spectrum target signal corresponding to a fretting wear load signal smaller than the fatigue limit, and the method comprises the following steps:
arranging the load signals larger than the fatigue limit into at least one group of first class block spectrum target signals, and arranging the fretting wear load signals into at least one group of second class block spectrum target signals according to an equivalent mode of an accumulated PV value;
the second type of block spectrum target signal is based on an accumulative PV value equivalent mode principle, wherein a PV value is in a form of a product of speed and load, and the PV value is equivalent to the sum of products of the load and the speed which is smaller than a fatigue limit in the target load signal and the sum of the PV values of the second type of block spectrum target signal.
2. The method of claim 1, wherein the first class of spectral target signals is transformed based on impairment equivalence.
3. The method of claim 1, wherein determining a loading signal from an automotive leaf spring test and the block spectrum target signal comprises:
driving an automobile plate spring test system by adopting a white noise block spectrum signal to obtain a response signal of an automobile plate spring;
determining a frequency response function and a transfer function according to the response signal and the white noise block spectrum signal;
and determining a loading signal step by step through iteration of the block spectrum target signal, the frequency response function and the transfer function.
4. A leaf spring test device, characterized by comprising:
the acquisition module is used for acquiring a target load signal of the automobile plate spring under the use working condition;
the conversion module is used for converting the target load signal into a plurality of sets of block spectrum target signals; the block spectrum target signals comprise a first type of block spectrum target signal corresponding to a load signal larger than a fatigue limit and a second type of block spectrum target signal corresponding to a fretting wear load signal smaller than the fatigue limit;
the determining module is used for determining a loading signal through an automobile plate spring test and the block spectrum target signal;
the compiling module is used for compiling a cyclic signal according to the block spectrum target signal, the loading signal and the preset service life of the plate spring; the cyclic signal is used for loading a plate spring test system to perform a plate spring test;
wherein, the conversion module includes:
arranging the load signals larger than the fatigue limit into at least one group of first class block spectrum target signals, and arranging the fretting wear load signals into at least one group of second class block spectrum target signals according to an equivalent mode of an accumulated PV value;
the second type of block spectrum target signal is based on the principle of an equivalent mode of an accumulated PV value, wherein the PV value is in the form of a product of speed and load, and the PV value is equivalent to the sum of the accumulated products of the load and the speed lower than the fatigue limit in the target load signal and the PV accumulated sum of the second type of block spectrum target signal.
5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any of the preceding claims 1 to 3 are implemented when the computer program is executed by the processor.
6. A computer-readable medium having non-volatile program code executable by a processor, wherein the program code causes the processor to perform the method of any of claims 1 to 3.
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| JPH08219964A (en) * | 1995-02-13 | 1996-08-30 | Mitsubishi Heavy Ind Ltd | Fretting fatigue test equipment |
| CN105092261B (en) * | 2015-06-03 | 2018-03-13 | 北京汽车股份有限公司 | Road load method of testing and system |
| CN105718633B (en) * | 2016-01-15 | 2019-08-02 | 重庆长安汽车股份有限公司 | A kind of loading analysis method of chassis member |
| CN107014627A (en) * | 2017-05-23 | 2017-08-04 | 北京科技大学 | Wheel shaft fatigue experimental device and method |
| CN108062435B (en) * | 2017-12-01 | 2021-07-09 | 中国航空工业集团公司沈阳飞机设计研究所 | Fatigue life calibration method based on nominal stress method |
| CN109060497A (en) * | 2018-07-18 | 2018-12-21 | 天津大学 | It is a kind of to consider the Analysis of Fatigue method lower than fatigue limit load |
| CN110442973B (en) * | 2019-08-06 | 2021-07-13 | 安徽江淮汽车集团股份有限公司 | Durability testing method and system for key parts of vehicle and storage medium |
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| CN112229654A (en) | 2021-01-15 |
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