CN114624038B - Method and device for processing vibration load of wire bracket and railway vehicle - Google Patents
Method and device for processing vibration load of wire bracket and railway vehicle Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 69
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- 238000012360 testing method Methods 0.000 claims abstract description 239
- 238000012546 transfer Methods 0.000 claims abstract description 82
- 230000003938 response to stress Effects 0.000 claims abstract description 73
- 230000007547 defect Effects 0.000 claims abstract description 61
- 230000008569 process Effects 0.000 claims abstract description 25
- 238000001228 spectrum Methods 0.000 claims description 145
- 238000003466 welding Methods 0.000 claims description 22
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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
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
- G01M17/10—Suspensions, axles or wheels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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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
- G01M13/00—Testing of machine parts
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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Abstract
The invention discloses a method and a device for processing vibration load of an electric wire bracket and a railway vehicle. Wherein the method comprises the following steps: determining a vibration load and stress transfer function of the wire support based on a vibration test; obtaining a test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support collected in the test process; determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function; and determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result. The method solves the technical problems that the related technology can not effectively and accurately estimate the fatigue damage of the wire bracket and determine critical defect parameters.
Description
Technical Field
The invention relates to the technical field of railway vehicle safety, in particular to a method and a device for processing vibration load of an electric wire bracket and a railway vehicle.
Background
With the rapid development of rail transit, the train operation speed is continuously improved, the line condition is continuously deteriorated, the vibration load born by the bogie is continuously increased, and particularly, the influence on the primary spring lower parts is more serious. The wire support is used as an important component of the bogie wheel set device and is mainly used for fixing the sensor cable, and the structural fatigue reliability of the wire support is important for guaranteeing the safe operation of a high-speed train.
In the train operation process, the wire support mainly bears non-stationary vibration load generated by wheel rail excitation, however, a random vibration fatigue evaluation method aiming at a rail vehicle suspension part is still in a research stage, so that the problem that fatigue damage of the wire support cannot be effectively and accurately estimated and critical defect parameters cannot be determined exists in the related technology.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for processing vibration load of an electric wire bracket and a railway vehicle, which at least solve the technical problems that the related technology cannot effectively and accurately estimate fatigue damage of the electric wire bracket and determine critical defect parameters.
According to an aspect of the embodiment of the present invention, there is provided a method of processing a vibration load of an electric wire holder, including: determining a vibration load and stress transfer function of the wire support based on a vibration test; obtaining a test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support acquired in the test process; determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function; and determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result.
Optionally, determining the vibration load versus stress transfer function of the wire support based on the vibration test includes: determining a test vibration load power spectrum of the wire support; performing a vibration test on the test vibration load power spectrum to obtain vibration load and stress transfer coefficients and phase differences of the wire bracket under different frequencies; and generating the vibration load and stress transfer function of the wire bracket according to the vibration load and stress transfer coefficient and the phase difference.
Optionally, determining a test vibration load power spectrum of the wire support includes: judging whether a first relative fatigue damage value is consistent with a second relative fatigue damage value, wherein the first relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by the test vibration load, and the second relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by performing a vibration test on the test vibration load; and under the condition that the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, constructing the test vibration load power spectrum of the wire support, wherein the test vibration load power spectrum is an adjusted test vibration load power spectrum.
Optionally, constructing the test vibration load power spectrum of the wire support includes: acquiring a test vibration load power spectrum corresponding to the test vibration load; determining the frequency band distribution corresponding to the test vibration load power spectrum according to the test vibration load power spectrum; and adjusting the test vibration load power spectrum according to the test vibration load and the frequency band distribution to generate the test vibration load power spectrum.
Optionally, determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result, including: obtaining the maximum stress range of the wire bracket at each position according to the stress response result; determining the critical defect parameters of the wire support according to the maximum stress range; and/or, according to the stress response result, obtaining a stress amplitude spectrum of the wire bracket; and determining the fatigue damage of the wire support according to the stress amplitude spectrum, wherein the fatigue damage is characterized by using equivalent stress in the stress amplitude spectrum.
Optionally, after generating the vibration load and stress transfer function of the wire support, the method further comprises: verifying the vibration load and stress transfer function according to a preset stress response result corresponding to the test vibration load, wherein the preset stress response result comprises at least one of the following: predetermined stress, predetermined equivalent stress.
Optionally, after determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result, the method further comprises: and when the welding defect size of the wire support is larger than the critical defect parameter in the welding process, determining the residual service life of the wire support according to the fatigue damage, and setting the maintenance period of the wire support.
According to another aspect of the embodiment of the present invention, there is also provided a processing apparatus for vibration load of an electric wire holder, including: a first determining module for determining a vibration load and stress transfer function of the wire support based on a vibration test; the acquisition module is used for acquiring the test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support acquired in the test process; the second determining module is used for determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function; and the third determining module is used for determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result.
According to another aspect of the embodiment of the present invention, there is also provided a railway vehicle including a bogie, an electric wire bracket, a collection device, and a processor, wherein the electric wire bracket and the collection device are provided on an axle box of the bogie; the acquisition equipment is used for acquiring the vibration load of the wire bracket; the processor is connected with the acquisition equipment and used for receiving the vibration load of the wire support and running a program, wherein the processing method of the vibration load of the wire support is executed when the program runs.
According to another aspect of the embodiment of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program, when executed, controls a device in which the computer-readable storage medium is located to perform the method for processing the vibration load of the wire holder according to any one of the above.
In the embodiment of the invention, a vibration load and stress transfer function of the wire bracket is determined based on a vibration test; obtaining a test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support collected in the test process; determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function; according to the stress response result, the fatigue damage and/or critical defect parameters of the wire support are determined, the vibration load and the stress transfer function of the wire support are determined by utilizing a vibration test, and the stress response result corresponding to the test vibration load of the wire support is determined based on the vibration load and the stress transfer function, so that the purpose of truly calculating the stress level of the wire support in a service state is achieved, further, the fatigue damage and/or critical defect parameters of the wire support are accurately estimated, and further, the technical problems that the fatigue damage and the critical defect parameters of the wire support cannot be effectively and accurately estimated in the related art are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a flowchart of a method of processing vibration load of a wire holder according to an embodiment of the present invention;
fig. 2 is a schematic view of a method of handling vibration load of a wire holder according to an alternative embodiment of the present invention;
FIG. 3 is a schematic illustration of stress versus inferred stress for a wire support according to an alternative embodiment of the present invention;
FIG. 4 is a diagram of data statistics corresponding to stress and calculated stress of a wire support, respectively, according to an alternative embodiment of the present invention;
fig. 5 is a schematic view of a processing device of vibration load of the wire holder according to the embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
According to an embodiment of the present invention, there is provided an embodiment of a method of processing a vibration load of an electric wire holder, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different from that herein.
Fig. 1 is a flowchart of a method of processing a vibration load of an electric wire holder according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, determining a vibration load and stress transfer function of the wire support based on a vibration test;
the vibration test is used for establishing the vibration load and stress transfer function of the wire support, so that the change rule of the vibration load, the stress transfer coefficient and the phase difference along with the load acting frequency can be truly reflected, and the natural frequency of the wire support can be determined.
Step S104, obtaining a test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support collected in the test process;
the vibration load of the wire support is the acceleration load of the axle box. The test vibration load of the wire support fully considers the time domain characteristics and the frequency distribution of the vibration load of the wire support.
Step S106, determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function;
the stress response results of the wire support include, but are not limited to, a plurality of stresses and equivalent stresses.
And S108, determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result.
The fatigue damage is characterized by using equivalent stress in a stress amplitude spectrum, and the critical defect parameter is a critical dimension parameter of a welding defect.
Through the steps, the vibration load and the stress transfer function of the wire support can be determined through utilizing the vibration test, and the stress response result corresponding to the test vibration load of the wire support is determined based on the vibration load and the stress transfer function, so that the purpose of truly calculating the stress level of the wire support in a service state is achieved, further, the fatigue damage and/or critical defect parameters of the wire support can be accurately estimated, and further, the technical problems that the fatigue damage of the wire support cannot be effectively and accurately estimated and the critical defect parameters can be effectively and accurately determined in the related art are solved.
In an alternative embodiment, determining the vibration load versus stress transfer function of the wire support based on the vibration test includes: determining a test vibration load power spectrum of the wire support; vibration test is carried out on the test vibration load power spectrum to obtain vibration load, stress transmission coefficient and phase difference of the wire bracket under different frequencies; and generating the vibration load and stress transfer function of the wire bracket according to the vibration load and stress transfer coefficient and the phase difference.
Optionally, vibration test can be performed according to the test vibration load power spectrum of the wire support, so as to obtain vibration load and stress transfer coefficient and phase difference of the wire support under different frequencies, and then the vibration load and stress transfer coefficient and phase difference are utilized to generate vibration load and stress transfer function of the wire support.
In an alternative embodiment, determining a test vibration load power spectrum of the wire support includes: judging whether the first relative fatigue damage value is consistent with the second relative fatigue damage value, wherein the first relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a test vibration load, and the second relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a vibration test of the test vibration load; under the condition that the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, a test vibration load power spectrum of the wire support is constructed, wherein the test vibration load power spectrum is the adjusted test vibration load power spectrum.
Optionally, in determining the test vibration load power spectrum of the wire support, it is required to determine whether the first relative fatigue damage value is consistent with the second relative fatigue damage value, and if the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, it is required to construct the test vibration load power spectrum of the wire support, where the test vibration load power spectrum is the adjusted test vibration load power spectrum. Therefore, if the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, the test vibration load power spectrum can be readjusted to obtain the test vibration load power spectrum of the wire support. The first relative fatigue damage value may be obtained from a test vibration load amplitude spectrum generated from a test vibration load, and the second relative fatigue damage value may be obtained from a test vibration load amplitude spectrum generated from a vibration test of the test vibration load.
In an alternative embodiment, constructing a test vibration load power spectrum of the wire support includes: acquiring a test vibration load power spectrum corresponding to the test vibration load; according to the test vibration load power spectrum, determining the frequency band distribution corresponding to the test vibration load power spectrum; and adjusting the test vibration load power spectrum according to the test vibration load and the frequency band distribution to generate a test vibration load power spectrum.
Optionally, in order to construct a test vibration load power spectrum of the wire support, a test vibration load power spectrum corresponding to the test vibration load needs to be obtained, the test vibration load power spectrum is utilized to determine a frequency band distribution corresponding to the test vibration load power spectrum, and then the test vibration load power spectrum is adjusted by utilizing the test vibration load and the frequency band distribution, so that the test vibration load power spectrum is generated.
In an alternative embodiment, determining fatigue damage and/or critical defect parameters of the wire support based on the stress response results comprises: obtaining the maximum stress range of the wire bracket at each position according to the stress response result; determining critical defect parameters of the wire support according to the maximum stress range; and/or, according to the stress response result, obtaining a stress amplitude spectrum of the wire bracket; and determining the fatigue damage of the wire support according to the stress amplitude spectrum, wherein the fatigue damage is represented by using equivalent stress in the stress amplitude spectrum.
Optionally, the stress response result includes a plurality of stress values of the wire support at each position, and the maximum stress value and the minimum stress value can be selected from the plurality of stress values, so as to determine a maximum stress range of the wire support at each position, and then determine critical defect parameters of the wire support according to the maximum stress range. In the specific implementation process, the critical defect parameters of the butt joint and the T-shaped joint of the wire support can be determined by utilizing the calculated maximum stress range and fracture mechanics theory, so that a theoretical basis is provided for the establishment of welding process requirements.
Optionally, the stress response result includes a plurality of stress values of the wire support at each position, a stress time-course curve may be generated according to the plurality of stress values, a stress amplitude spectrum may be compiled, and fatigue damage of the wire support may be determined according to the stress amplitude spectrum, where the fatigue damage is represented by an equivalent stress in the stress amplitude spectrum.
In the embodiment, not only the critical defect parameters of the wire support can be accurately calculated according to the stress response result, but also the fatigue damage of the wire support can be accurately calculated, so that theoretical basis can be provided for the welding process requirements and the residual life of the wire support.
In an alternative embodiment, after generating the vibration load and stress transfer function of the wire support, the method further comprises: verifying the vibration load and the stress transfer function according to a preset stress response result corresponding to the test vibration load, wherein the preset stress response result comprises at least one of the following: predetermined stress, predetermined equivalent stress.
Optionally, in the case that the predetermined stress response result includes the predetermined stress, the vibration load and the stress transfer function may be verified according to the predetermined stress corresponding to the test vibration load, for example, the test vibration load of the wire support is input into the vibration load and the stress transfer function, the stress of the wire support is output, the stress of the wire support is compared with the predetermined stress, and if the difference between the stress and the stress is smaller than the first preset difference, it is indicated that the actual stress level of the wire support can be truly reflected by the stress obtained by the vibration load and the stress transfer function. For example, by adopting the test vibration load as the input vibration load of the vibration load and stress transfer function, the result shows that the stress response calculated by the transfer function method has higher consistency with the actually measured stress, and the deviation of the maximum stress amplitude is within 3 percent, and the stress response calculated by the invention is verified to accurately reflect the stress level of the wire bracket.
Optionally, under the condition that the predetermined stress response result includes the predetermined equivalent stress, the vibration load and the stress transfer function can be verified according to the predetermined equivalent stress corresponding to the test vibration load, for example, a stress time curve of the wire support is analyzed through statistics, a stress amplitude spectrum is compiled, the equivalent stress representing the fatigue damage is calculated, the equivalent stress obtained by utilizing the vibration load and the stress transfer function is compared with the predetermined equivalent stress, and if the difference between the vibration load and the stress transfer function is smaller than a second preset difference, the fatigue damage of the wire support can be effectively predicted by the vibration load and the stress transfer function. For example, a rain flow counting method is utilized for carding statistics and compiling stress amplitude spectrum, calculated stress distribution characteristics (corresponding to the equivalent stress) are basically consistent with actual measurement equivalent stress, and the equivalent stress deviation of the wire support is calculated to be within 4%, so that engineering requirements are met.
The predetermined stress response result is a standard stress response result, and can accurately reflect the stress corresponding to the test vibration load and the equivalent stress. In the implementation process, a predetermined stress response result corresponding to the test vibration load can be deduced through a formula.
In the embodiment, the effectiveness of the vibration load and the stress transfer function can be verified through the preset stress and the preset equivalent stress respectively, so that the fatigue damage of the wire bracket can be accurately estimated by using the vibration load and the stress transfer function subsequently while the engineering requirement is met, and the error is reduced.
In an alternative embodiment, after determining the fatigue damage and/or critical defect parameters of the wire support according to the stress response result, the method further comprises: when the welding defect size of the wire support is larger than the critical defect parameter in the welding process, determining the residual service life of the wire support according to fatigue damage, and setting the maintenance period of the wire support.
Optionally, when the welding defect size of the wire support is greater than the critical defect parameter, the stress amplitude spectrum can be used for predicting the residual life of the wire support in a service state, so as to formulate a reasonable overhaul period. The maintenance period can be flexibly set according to practical needs, for example, the maintenance period comprises, but is not limited to, 1 day, 10 days, 15 days, 30 days and the like. The more severe the fatigue damage, the shorter the remaining life, and conversely the longer the remaining life, the wire holder. The residual service life of the wire support can be accurately predicted through the embodiment, and the wire support is regularly maintained by setting the overhaul period of the wire support.
An alternative embodiment of the present invention will be described in detail below.
According to the method for processing the vibration load of the wire support, firstly, the time domain characteristic and the frequency distribution characteristic of the acceleration load of the wire shaft box are analyzed, based on the assumption that the acceleration speed and the stress of the standard IEC 61373 are in a linear relation, fatigue damage assessment is verified to be carried out on the wire support by adopting the actually measured acceleration load, and the assessment result is greatly different from actual fatigue damage. On the basis, an acceleration vibration load spectrum is constructed, an acceleration load and stress transfer function is obtained through a vibration test, a stress time history curve of each position of the wire support is obtained through calculation by combining the measured non-steady acceleration load of the circuit, and the stress time history curve has higher consistency with the measured stress. And combing and counting the calculated stress time course curve by using a rain flow counting method, and compiling a stress spectrum (corresponding to the stress amplitude spectrum), so as to calculate the fatigue damage of the key area of the wire support. And meanwhile, the maximum stress range of the wire support under the action of the actual line load can be accurately obtained, and the critical defect fusion rate of the butt joint and the T-shaped joint of the structure is determined by utilizing the fracture mechanics theory. The method can provide a certain theoretical support for predicting the fatigue life of the wire support and formulating the welding process requirements.
Fig. 2 is a schematic view of a method for handling vibration load of an electric wire holder according to an alternative embodiment of the present invention, as shown in fig. 2, and the specific implementation steps thereof are as follows:
and step 1, acquiring acceleration load (corresponding to the test vibration load) of the axle box of the line, and analyzing time domain characteristics of the load. Performing Fourier transformation on the actually measured acceleration load by utilizing a MATLAB programming mode to obtain an axle box acceleration power spectrum (corresponding to the test vibration load power spectrum), taking the acceleration power spectrum as an input load of a vibration table, and recording time domain signal characteristics input by the test table;
and 2, carrying out statistical analysis on the time domain acceleration signals of the practical test axle box and the time domain acceleration signals of the vibrating table at the same time by using a rain flow counting method, and compiling an acceleration load amplitude spectrum. According to the assumption that the acceleration rate and the structural stress response in the standard IEC61373 are in a linear relation, calculating the relative fatigue damage value of the wire support under the action of two loads, and judging that the actual damage of the structure cannot be accurately reflected by adopting the actually measured acceleration power spectrum for vibration fatigue damage evaluation;
step 3, constructing a vibration load test power spectrum by combining the acceleration time domain load characteristics of the line axle box and the frequency band distribution, acquiring the change rule of the vibration load and the stress transfer coefficient of the wire support and the phase difference along with the load acting frequency, and further constructing a vibration load and stress transfer function of the wire support;
Step 4, calculating stress response of a key area of the wire support by adopting an actually measured axle box acceleration signal, and using the axle box acceleration signal as an input load of a vibrating table, collecting stress of the wire support and calculating stress for comparative analysis, and verifying that the stress response of the wire support obtained by adopting a transfer function method can truly reflect the actual stress level of the structure; fig. 3 is a schematic diagram of stress and calculated stress of a wire support according to an alternative embodiment of the present invention, as shown in fig. 3, using an acceleration load of a non-stationary axle box as an acquisition stress obtained by inputting a vibration table and a calculated stress obtained by combining the vibration load with a transfer function, and verifying the effectiveness and accuracy of obtaining a stress response of the wire support by using the transfer function.
Step 5, the stress time curve of the wire support is statistically analyzed, a stress amplitude spectrum is compiled, the equivalent stress of each measuring point representing the fatigue damage is calculated, and the result shows that the equivalent stress calculated by using a transfer function method has smaller difference from the equivalent stress calculated by using a test, and the fatigue damage of the wire support can be effectively predicted by the method provided by the invention; fig. 4 is a schematic diagram of data statistics results corresponding to stress and calculated stress of the wire support according to an alternative embodiment of the present invention, and as shown in fig. 4, the data statistics results include a stress maximum value, a stress minimum value, a stress amplitude, an equivalent stress, and a deviation of the stress and the calculated stress in the statistics results.
Step 6, calculating the maximum stress range of each position of the wire support under the action of line load, and acquiring critical fusion defect size parameters of the butt joint and the T-shaped joint of the wire support by combining with fracture mechanics theory, so as to determine the allowable defect depths of different welding joints in the welding process of the wire support;
and 7, if the welding defect size of the wire support is larger than the critical defect parameter in the welding process, predicting the residual life of the wire support in the service state by using the calculated stress amplitude spectrum, and further formulating a reasonable overhaul period.
In the embodiment, the method adopts vibration load acquired based on the circuit as input, so that the stress level of the wire support in the service state can be truly reflected, and further, the fatigue damage of the wire support is accurately estimated and the critical dimension parameter of the structural welding defect is accurately determined.
Example 2
According to another aspect of the embodiment of the present invention, there is also provided a device for processing a vibration load of an electric wire holder, fig. 5 is a schematic diagram of the device for processing a vibration load of an electric wire holder according to an embodiment of the present invention, as shown in fig. 5, the device for processing a vibration load of an electric wire holder including: the first determination module 52, the acquisition module 54, the second determination module 56, and the third determination module 58. The processing device of the vibration load of the wire holder will be described in detail.
A first determination module 52 for determining a vibration load and stress transfer function of the wire support based on a vibration test; the obtaining module 54 is connected to the first determining module 52, and is configured to obtain a test vibration load of the wire support, where the test vibration load is a vibration load of the wire support collected during the test; the second determining module 56 is connected to the obtaining module 54, and is configured to determine a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function; the third determining module 58 is connected to the second determining module 56 and is configured to determine fatigue damage and/or critical defect parameters of the wire support according to the stress response result.
It should be noted that each of the above modules may be implemented by software or hardware, for example, in the latter case, it may be implemented by: the above modules may be located in the same processor; and/or the above modules are located in different processors in any combination.
In the above embodiment, the processing device for vibration load of the wire support may determine the vibration load and the stress transfer function of the wire support by using a vibration test, and determine the stress response result corresponding to the test vibration load of the wire support based on the vibration load and the stress transfer function, thereby achieving the purpose of truly calculating the stress level of the wire support in the service state, further realizing accurate prediction of fatigue damage and/or critical defect parameters of the wire support, and further solving the technical problem that the related art cannot effectively and accurately predict the fatigue damage and determine the critical defect parameters of the wire support.
Here, the first determining module 52, the acquiring module 54, the second determining module 56, and the third determining module 58 correspond to steps S102 to S108 in embodiment 1, and the above modules are the same as examples and application scenarios implemented by the corresponding steps, but are not limited to those disclosed in embodiment 1.
Optionally, the first determining module 52 includes: a first determining unit for determining a test vibration load power spectrum of the wire holder; the first processing unit is used for carrying out vibration test on the test vibration load power spectrum to obtain vibration load, stress transmission coefficient and phase difference of the wire bracket under different frequencies; and the generating unit is used for generating the vibration load and stress transfer function of the wire bracket according to the vibration load and stress transfer coefficient and the phase difference.
Optionally, the first determining unit includes: the judging subunit is used for judging whether the first relative fatigue damage value is consistent with the second relative fatigue damage value, wherein the first relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a test vibration load, and the second relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a vibration test of the test vibration load; and the construction subunit is used for constructing a test vibration load power spectrum of the wire bracket under the condition that the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, wherein the test vibration load power spectrum is the adjusted test vibration load power spectrum.
Optionally, the constructing subunit includes: the acquisition subunit is used for acquiring a test vibration load power spectrum corresponding to the test vibration load; the determining subunit is used for determining the frequency band distribution corresponding to the test vibration load power spectrum according to the test vibration load power spectrum; and the generating subunit is used for adjusting the test vibration load power spectrum according to the test vibration load and the frequency band distribution to generate a test vibration load power spectrum.
Optionally, the third determining module 58 includes: the second processing unit is used for obtaining the maximum stress range of the wire bracket at each position according to the stress response result; the second determining unit is used for determining critical defect parameters of the wire support according to the maximum stress range; and/or a third processing unit, configured to obtain a stress amplitude spectrum of the wire support according to the stress response result; and the third determining unit is used for determining the fatigue damage of the wire bracket according to the stress amplitude spectrum, wherein the fatigue damage is represented by using the equivalent stress in the stress amplitude spectrum.
Optionally, the apparatus further includes: the verification module is used for verifying the vibration load and the stress transfer function according to a preset stress response result corresponding to the test vibration load after the vibration load and the stress transfer function of the wire support are generated, wherein the preset stress response result comprises at least one of the following: predetermined stress, predetermined equivalent stress.
Optionally, the apparatus further includes: and the fourth determining module is used for determining the residual service life of the wire bracket according to the fatigue damage when the welding defect size of the wire bracket is larger than the critical defect parameter in the welding process after determining the fatigue damage and/or the critical defect parameter of the wire bracket according to the stress response result, and setting the overhaul period of the wire bracket.
Example 3
According to another aspect of the embodiment of the invention, there is also provided a railway vehicle including a bogie, an electric wire bracket, a collection device, and a processor, wherein the electric wire bracket and the collection device are provided on an axle box of the bogie; the acquisition equipment is used for acquiring the vibration load of the wire bracket; and the processor is connected with the acquisition equipment and is used for receiving the vibration load of the wire support and running a program, wherein the processing method of the vibration load of the wire support is executed when the program runs.
The invention also provides a computer program product adapted to perform, when executed on a processor, a program initialized with the method steps of: determining a vibration load and stress transfer function of the wire support based on a vibration test; obtaining a test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support collected in the test process; determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function; and determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result.
Optionally, determining the vibration load versus stress transfer function of the wire support based on the vibration test includes: determining a test vibration load power spectrum of the wire support; vibration test is carried out on the test vibration load power spectrum to obtain vibration load, stress transmission coefficient and phase difference of the wire bracket under different frequencies; and generating the vibration load and stress transfer function of the wire bracket according to the vibration load and stress transfer coefficient and the phase difference.
Optionally, determining the test vibration load power spectrum of the wire support includes: judging whether the first relative fatigue damage value is consistent with the second relative fatigue damage value, wherein the first relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a test vibration load, and the second relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a vibration test of the test vibration load; under the condition that the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, a test vibration load power spectrum of the wire support is constructed, wherein the test vibration load power spectrum is the adjusted test vibration load power spectrum.
Optionally, constructing a test vibration load power spectrum of the wire support includes: acquiring a test vibration load power spectrum corresponding to the test vibration load; according to the test vibration load power spectrum, determining the frequency band distribution corresponding to the test vibration load power spectrum; and adjusting the test vibration load power spectrum according to the test vibration load and the frequency band distribution to generate a test vibration load power spectrum.
Optionally, determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result comprises: obtaining the maximum stress range of the wire bracket at each position according to the stress response result; determining critical defect parameters of the wire support according to the maximum stress range; and/or, according to the stress response result, obtaining a stress amplitude spectrum of the wire bracket; and determining the fatigue damage of the wire support according to the stress amplitude spectrum, wherein the fatigue damage is represented by using equivalent stress in the stress amplitude spectrum.
Optionally, after generating the vibration load and stress transfer function of the wire support, the method further comprises: verifying the vibration load and the stress transfer function according to a preset stress response result corresponding to the test vibration load, wherein the preset stress response result comprises at least one of the following: predetermined stress, predetermined equivalent stress.
Optionally, after determining the fatigue damage and/or critical defect parameters of the wire support according to the stress response result, the method further comprises: when the welding defect size of the wire support is larger than the critical defect parameter in the welding process, determining the residual service life of the wire support according to fatigue damage, and setting the maintenance period of the wire support.
Example 4
According to another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the processing method of the vibration load of the wire holder of any one of the above is controlled by a device in which the computer-readable storage medium is located when the program is run.
In this embodiment, the computer readable storage medium may be located in any one of the computer terminals in the computer terminal group in the computer network and/or in any one of the mobile terminals in the mobile terminal group, and the computer readable storage medium includes a stored program.
Optionally, the computer readable storage medium is controlled to perform the following functions when the program is run: determining a vibration load and stress transfer function of the wire support based on a vibration test; obtaining a test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support collected in the test process; determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function; and determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result.
Optionally, determining the vibration load versus stress transfer function of the wire support based on the vibration test includes: determining a test vibration load power spectrum of the wire support; vibration test is carried out on the test vibration load power spectrum to obtain vibration load, stress transmission coefficient and phase difference of the wire bracket under different frequencies; and generating the vibration load and stress transfer function of the wire bracket according to the vibration load and stress transfer coefficient and the phase difference.
Optionally, determining the test vibration load power spectrum of the wire support includes: judging whether the first relative fatigue damage value is consistent with the second relative fatigue damage value, wherein the first relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a test vibration load, and the second relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a vibration test of the test vibration load; under the condition that the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, a test vibration load power spectrum of the wire support is constructed, wherein the test vibration load power spectrum is the adjusted test vibration load power spectrum.
Optionally, constructing a test vibration load power spectrum of the wire support includes: acquiring a test vibration load power spectrum corresponding to the test vibration load; according to the test vibration load power spectrum, determining the frequency band distribution corresponding to the test vibration load power spectrum; and adjusting the test vibration load power spectrum according to the test vibration load and the frequency band distribution to generate a test vibration load power spectrum.
Optionally, determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result comprises: obtaining the maximum stress range of the wire bracket at each position according to the stress response result; determining critical defect parameters of the wire support according to the maximum stress range; and/or, according to the stress response result, obtaining a stress amplitude spectrum of the wire bracket; and determining the fatigue damage of the wire support according to the stress amplitude spectrum, wherein the fatigue damage is represented by using equivalent stress in the stress amplitude spectrum.
Optionally, after generating the vibration load and stress transfer function of the wire support, the method further comprises: verifying the vibration load and the stress transfer function according to a preset stress response result corresponding to the test vibration load, wherein the preset stress response result comprises at least one of the following: predetermined stress, predetermined equivalent stress.
Optionally, after determining the fatigue damage and/or critical defect parameters of the wire support according to the stress response result, the method further comprises: when the welding defect size of the wire support is larger than the critical defect parameter in the welding process, determining the residual service life of the wire support according to fatigue damage, and setting the maintenance period of the wire support.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform 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 Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. A method of processing a vibration load of an electric wire holder, comprising:
determining a vibration load and stress transfer function of the wire support based on a vibration test;
obtaining a test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support acquired in the test process;
determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function;
determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result;
wherein, confirm the vibration load and stress transfer function of electric wire support based on vibration test, include: determining a test vibration load power spectrum of the wire support; performing a vibration test on the test vibration load power spectrum to obtain vibration load and stress transfer coefficients and phase differences of the wire bracket under different frequencies; generating the vibration load and stress transfer function of the wire support according to the vibration load and stress transfer coefficient and the phase difference;
Wherein determining a test vibration load power spectrum of the wire support comprises: judging whether a first relative fatigue damage value is consistent with a second relative fatigue damage value, wherein the first relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by the test vibration load, and the second relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by performing a vibration test on the test vibration load; under the condition that the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, constructing the test vibration load power spectrum of the wire bracket, wherein the test vibration load power spectrum is an adjusted test vibration load power spectrum;
wherein constructing the test vibration load power spectrum of the wire support comprises: acquiring a test vibration load power spectrum corresponding to the test vibration load; determining the frequency band distribution corresponding to the test vibration load power spectrum according to the test vibration load power spectrum; and adjusting the test vibration load power spectrum according to the test vibration load and the frequency band distribution to generate the test vibration load power spectrum.
2. The method of claim 1, wherein determining fatigue damage and/or critical defect parameters of the wire support based on the stress response results comprises:
obtaining the maximum stress range of the wire bracket at each position according to the stress response result; determining the critical defect parameters of the wire support according to the maximum stress range; and/or the number of the groups of groups,
according to the stress response result, obtaining a stress amplitude spectrum of the wire bracket; and determining the fatigue damage of the wire support according to the stress amplitude spectrum, wherein the fatigue damage is characterized by using equivalent stress in the stress amplitude spectrum.
3. The method of claim 1, wherein after generating the vibration load and stress transfer function of the wire support, the method further comprises:
verifying the vibration load and stress transfer function according to a preset stress response result corresponding to the test vibration load, wherein the preset stress response result comprises at least one of the following: predetermined stress, predetermined equivalent stress.
4. A method according to any one of claims 1 to 3, wherein after determining fatigue damage and/or critical defect parameters of the wire support from the stress response results, the method further comprises:
And when the welding defect size of the wire support is larger than the critical defect parameter in the welding process, determining the residual service life of the wire support according to the fatigue damage, and setting the maintenance period of the wire support.
5. A processing apparatus for vibration load of an electric wire holder, comprising:
a first determining module for determining a vibration load and stress transfer function of the wire support based on a vibration test;
the acquisition module is used for acquiring the test vibration load of the wire support, wherein the test vibration load is the vibration load of the wire support acquired in the test process;
the second determining module is used for determining a stress response result of the wire support corresponding to the test vibration load according to the vibration load and the stress transfer function;
the third determining module is used for determining fatigue damage and/or critical defect parameters of the wire support according to the stress response result;
wherein the first determining module includes: a first determining unit for determining a test vibration load power spectrum of the wire holder; the first processing unit is used for carrying out vibration test on the test vibration load power spectrum to obtain vibration load, stress transmission coefficient and phase difference of the wire bracket under different frequencies; the generating unit is used for generating a vibration load and stress transfer function of the wire bracket according to the vibration load and stress transfer coefficient and the phase difference;
Wherein the first determining unit includes: the judging subunit is used for judging whether the first relative fatigue damage value is consistent with the second relative fatigue damage value, wherein the first relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a test vibration load, and the second relative fatigue damage value is obtained according to a test vibration load amplitude spectrum generated by a vibration test of the test vibration load; the construction subunit is used for constructing a test vibration load power spectrum of the wire bracket under the condition that the first relative fatigue damage value is inconsistent with the second relative fatigue damage value, wherein the test vibration load power spectrum is an adjusted test vibration load power spectrum;
wherein the construction subunit comprises: the acquisition subunit is used for acquiring a test vibration load power spectrum corresponding to the test vibration load; the determining subunit is used for determining the frequency band distribution corresponding to the test vibration load power spectrum according to the test vibration load power spectrum; and the generating subunit is used for adjusting the test vibration load power spectrum according to the test vibration load and the frequency band distribution to generate a test vibration load power spectrum.
6. The railway vehicle is characterized by comprising a bogie, an electric wire bracket, acquisition equipment and a processor, wherein the electric wire bracket and the acquisition equipment are arranged on an axle box of the bogie; the acquisition equipment is used for acquiring the vibration load of the wire bracket; the processor is connected with the acquisition device and is used for receiving the vibration load of the wire support and running a program, wherein the processing method of the vibration load of the wire support is executed when the program runs.
7. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the program, when run, controls a device in which the computer-readable storage medium is located to execute the method of processing the vibration load of the wire holder according to any one of claims 1 to 4.
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