CN106021688A - Method and apparatus for assessing wheel strength of rail transit locomotive - Google Patents
Method and apparatus for assessing wheel strength of rail transit locomotive Download PDFInfo
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- CN106021688A CN106021688A CN201610321829.0A CN201610321829A CN106021688A CN 106021688 A CN106021688 A CN 106021688A CN 201610321829 A CN201610321829 A CN 201610321829A CN 106021688 A CN106021688 A CN 106021688A
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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Abstract
The invention discloses a method and an apparatus for assessing wheel strength of a rail transit locomotive. The method comprises the steps of inputting preset calculation parameters in a preset to-be-assessed wheel model to realize automatic loading of a vehicle load and automatic creation of various working conditions, and acquiring coordinates, stress tensors and main stresses of a key point on a to-be-assessed wheel in various working conditions; performing calculation according to the coordinates, the stress tensors and the main stresses of the key point on the to-be-assessed wheel in various working conditions to obtain an average stress, a stress amplitude, a stress range and an equivalent stress of the key point; judging whether the average stress, the stress amplitude, the stress range and the equivalent stress are in a preset range or not; and assessing that the strength of the to-be-assessed wheel is in a safety working condition under the condition that the average stress, the stress amplitude, the stress range and the equivalent stress are in the preset range. Through the method and the apparatus, the problem of non-unified analytic results caused by individual difference of simulation personnel in the prior art is solved.
Description
Technical field
The present invention relates to rail transit locomotive field, in particular it relates to a kind of track traffic machine
The appraisal procedure of the wheel strength of car and device.
Background technology
Assessing at existing rail transit rolling stock wheel strength, main flow is the imitative of specialty
True man person carries out manual grid division by the cad model providing designer, then carries out manually
Load and set up substantial amounts of design condition, needing the substantial amounts of time to carry out complicated result of calculation
Process, i.e. waste a large amount of manpower, the most easily make mistakes.Especially for car wheel structure and stress shape
State, the stress result calculated needs to carry out special process, has the biggest technical difficulty,
It is that manpower cannot overcome.The process of big data in processing procedure, is also that present wheel strength is commented
During estimating, faced by technical barrier, the most error-prone.For establishment report, faced by
Export tens operating modes, 4 kinds or more kinds of stress result cloud atlas, and list goes out measuring car to be checked
Assessment result at the node of wheel, is required for spending substantial amounts of manpower, the most error-prone.
Generally speaking, in prior art, human intervention situation is too much, and exists because of emulation personnel
The skimble-scamble problem of analysis result that body difference causes.
Summary of the invention
It is an object of the invention to provide the appraisal procedure of the wheel strength of a kind of rail transit locomotive
And device.Wherein, the data under each operating mode can be processed by described method automatically,
Not only overcome in prior art owing to emulation personnel exist the analysis result that individual variation causes
Skimble-scamble problem, but also decrease the generation of human intervention situation.
To achieve these goals, the present invention provides the wheel strength of a kind of rail transit locomotive
Appraisal procedure.Described method includes:
By default calculating parameter input to the wheel model to be assessed preset, to realize vehicle
Automatically loading of load and automatically creating of various working, and collect on wheel to be assessed
Key point coordinate, stress tensor and principal stress under various working；
According to the coordinate under various working of the key point on wheel to be assessed, stress tensor and
Principal stress be calculated the mean stress of described key point, stress amplitude, the range of stress and
Equivalent stress；
Mean stress according to described key point, stress amplitude, the range of stress and etc. effect
Power judges that whether described mean stress, stress amplitude, the range of stress and equivalent stress are in advance
In the range of if；
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress are in advance
If in the case of in the range of, then the intensity assessing described wheel to be assessed is safe operating mode.
Alternatively, described method also includes:
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress do not exist
In the case of in the scope preset, then the intensity assessing described wheel to be assessed is fault condition.
Alternatively, the described wheel model to be assessed that default calculating parameter input is extremely preset,
To realize automatically loading of car load and automatically creating of various working, and collect and treat
Before the key point on assessment wheel coordinate, stress tensor and principal stress under various working,
Described method also includes:
Design parameter according to described wheel to be assessed is set up and is obtained the three of described wheel to be assessed
Dimension module；
Threedimensional model to described wheel to be assessed carries out the automatic division of finite element grid,
To described wheel model to be assessed.
Alternatively, described design parameter includes wheel cross section parameter, the anglec of rotation and control
Parameter.
Alternatively, described coordinate according to the key point on wheel to be assessed under various working,
Stress tensor and principal stress are calculated the mean stress of described key point, stress amplitude, answer
Power scope and equivalent stress, including:
Calculate according to described key point stress tensor under various working and obtain described key point
Equivalent stress under various working；
It is calculated described key point according to described key point principal stress under various working to exist
The direction cosines of principal stress maximum under various working；
By described key point other direction principal stress under various working respectively with each work
Project on the direction of the principal stress maximum that condition is corresponding, ask for projection value；
According to described projection value search described key point projection maximum under each operating mode and
Projection minima；
Calculate according to described key point projection maximum under each operating mode and projection minima
Obtain described key point mean stress under this operating mode, stress amplitude and the range of stress.
Alternatively, described method also includes:
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress do not exist
In the case of in the scope preset, adjust the design parameter of described wheel to be assessed, so that
The intensity of described wheel to be assessed is in safe operating mode.
Alternatively, described method also includes:
The assessment report of described wheel to be assessed is automatically generated according to assessment result,
Wherein, described assessment report includes the stress cloud of the key point on described wheel to be assessed
Figure, stress result and safety coefficient.
Correspondingly, the assessment of the wheel strength that the present invention also provides for a kind of rail transit locomotive fills
Put.Described device includes:
Collecting unit, for the wheel mould to be assessed default calculating parameter input extremely preset
Type, to realize automatically loading of car load and automatically creating of various working, and gathers
The key point on wheel to be assessed coordinate, stress tensor and principal stress under various working；
Computing unit, for according to the seat under various working of the key point on wheel to be assessed
Mark, stress tensor and principal stress be calculated the mean stress of described key point, stress amplitude,
The range of stress and equivalent stress；
Judging unit, for the mean stress according to described key point, stress amplitude, stress
Scope and equivalent stress judge described mean stress, stress amplitude, the range of stress and etc.
Whether efficacy is in default scope；
Assessment unit, for judge described mean stress, stress amplitude, the range of stress with
And in the case of equivalent stress is in default scope, then assess the strong of described wheel to be assessed
Degree is safe operating mode.
Alternatively, described judging unit, it is additionally operable to:
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress do not exist
In the case of in the scope preset, then the intensity assessing described wheel to be assessed is fault condition.
Alternatively, described computing unit, specifically for:
Calculate according to described key point stress tensor under various working and obtain described key point
Equivalent stress under various working；
It is calculated described key point according to described key point principal stress under various working to exist
The direction cosines of principal stress maximum under various working；
By described key point other direction principal stress under various working respectively with each work
Project on the direction of the principal stress maximum that condition is corresponding, ask for projection value；
According to described projection value search described key point projection maximum under each operating mode and
Projection minima；
Calculate according to described key point projection maximum under each operating mode and projection minima
Obtain described key point mean stress under this operating mode, stress amplitude and the range of stress.
By technique scheme, by default calculating parameter input to the car to be assessed preset
Wheel model, to realize automatically loading of car load and automatically creating of various working, and adopts
Collection obtains coordinate, stress tensor and the master under various working of the key point on wheel to be assessed
Stress；And open according to the coordinate under various working of the key point on wheel to be assessed, stress
Amount and principal stress are calculated the mean stress of described key point, stress amplitude, the range of stress
And equivalent stress；And according to the mean stress of described key point, stress amplitude, stress model
Enclose and equivalent stress judges described mean stress, stress amplitude, the range of stress and equivalence
Whether stress is in default scope；Judging described mean stress, stress amplitude, stress
In the case of scope and equivalent stress are in default scope, then assess described car to be assessed
The intensity of wheel is safe operating mode, not only overcomes in prior art owing to emulation personnel exist individual
The skimble-scamble problem of analysis result that body difference causes, but also decrease human intervention situation
Generation, provide simple, fast appraisal procedure to emulation personnel.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, under
The accompanying drawing used required in embodiment or description of the prior art will be briefly described by face.
It should be evident that the accompanying drawing in describing below is only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these figures.
Fig. 1 is the assessment of the wheel strength of the rail transit locomotive that one embodiment of the invention provides
The flow chart of method；
Fig. 2 is the assessment of the wheel strength of the rail transit locomotive that one embodiment of the invention provides
The structural representation of device.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present invention
Case is clearly and completely described, it is clear that described embodiment is only the present invention one
Divide embodiment rather than whole embodiments.Based on the embodiment in the present invention, this area is general
The every other embodiment that logical technical staff is obtained under not making creative work premise,
Broadly fall into the scope of protection of the invention.
Fig. 1 is the assessment side of the wheel strength of the rail transit locomotive that one embodiment of the invention provides
The flow chart of method.As it is shown in figure 1, the car of the rail transit locomotive of one embodiment of the invention offer
The appraisal procedure of wheel intensity includes:
In step S101, by default calculating parameter input to the wheel mould to be assessed preset
Type, to realize automatically loading of car load and automatically creating of various working, and collects
The key point on wheel to be assessed coordinate, stress tensor and principal stress under various working.
Specifically, before this step, described method also includes: according to described car to be assessed
The design parameter of wheel sets up the threedimensional model obtaining described wheel to be assessed；To described to be assessed
The threedimensional model of wheel carries out the automatic division of finite element grid, obtains described wheel to be assessed
Model.Wherein, described design parameter includes wheel cross section parameter, the anglec of rotation and control
Parameter.
Wheel cross section parameter can be controlled, it is achieved automatically generating of wheel cross section by input,
Parametrization sets up the axle partial cross-section matched simultaneously, by setting the anglec of rotation, raw
Become threedimensional model.Meanwhile, according to the concrete structure of wheel to be detected, joined by setup control
Number, sets up on wheel such as the threedimensional model of pin-and-hole.Then, it is achieved the finite element of threedimensional model
The automatic division of grid.
Then, in step s 102, according to the key point on wheel to be assessed in various working
Under coordinate, stress tensor and principal stress be calculated described key point mean stress, should
Power amplitude, the range of stress and equivalent stress.
Specifically, this step includes: open according to described key point stress under various working
Amount is calculated described key point equivalent stress under various working；According to described key point
Principal stress under various working is calculated described key point, and under various working, principal stress is
The direction cosines of big value；Described key point other direction principal stress under various working is divided
Do not project on the direction of the principal stress maximum corresponding with each operating mode, ask for projection
Value；According to described projection value search described key point projection maximum under each operating mode and
Projection minima；According to described key point projection maximum under each operating mode and projection
Little value is calculated described key point mean stress under this operating mode, stress amplitude and answers
Power scope.
And then, in step s 103, according to mean stress, the stress amplitude of described key point
Value, the range of stress and equivalent stress judge described mean stress, stress amplitude, stress model
Enclose and whether equivalent stress is in default scope.
Specifically, for each key point, the equivalent stress under each operating mode is respectively less than
The yield strength of wheel material, then illustrate that the equivalent stress of key point is within the scope of presetting.
In other words, the static strength assessment of wheel is qualified.For each key point, each work
Mean stress, stress amplitude and the range of stress under condition all in default scope of data,
Then illustrate the mean stress of key point, stress amplitude and the range of stress default scope it
In.In other words, the fatigue analysis of wheel is qualified.
Finally, in step S104, judging described mean stress, stress amplitude, stress
In the case of scope and equivalent stress are in default scope, then assess described car to be assessed
The intensity of wheel is safe operating mode.
Specifically, described mean stress, stress amplitude, the range of stress and equivalence are being judged
In the case of stress is not in default scope, then the intensity assessing described wheel to be assessed is
Fault condition.
Preferably, described method also includes: judge described mean stress, stress amplitude,
In the case of the range of stress and equivalent stress be not in default scope, adjust described to be evaluated
Estimate the design parameter of wheel, so that the intensity of described wheel to be assessed is in safe operating mode.
Thereby, it is achieved that the Automatic Cycle assessment of wheel, until the wheel of design meets requirement of strength
Till.
Preferably, described method also includes: automatically generate described to be assessed according to assessment result
The assessment report of wheel, wherein, described assessment report includes the pass on described wheel to be assessed
Stress Map, stress result and the safety coefficient of key point.Thereby, emulation personnel can be straight
See ground and recognize the assessment result of wheel.
The wheel model to be assessed that default calculating parameter input is extremely preset by the present embodiment, with
Realize automatically loading of car load and automatically creating of various working, and collect to be evaluated
Estimate coordinate, stress tensor and the principal stress under various working of the key point on wheel；And root
According to coordinate, stress tensor and the principal stress under various working of the key point on wheel to be assessed
Be calculated the mean stress of described key point, stress amplitude, the range of stress and etc. effect
Power；And mean stress, stress amplitude, the range of stress and the equivalence according to described key point
Stress judges that whether described mean stress, stress amplitude, the range of stress and equivalent stress exist
In the scope preset；Judge described mean stress, stress amplitude, the range of stress and etc.
In the case of efficacy is in default scope, then the intensity assessing described wheel to be assessed is
Safe operating mode, not only overcomes in prior art and causes owing to emulation personnel exist individual variation
The skimble-scamble problem of analysis result, but also decrease the generation of human intervention situation, give
Emulation personnel provide simple, fast appraisal procedure.
For embodiment of the method, in order to be briefly described, therefore it is all expressed as a series of action
Combination, but those skilled in the art should know, and the embodiment of the present invention is not by described
The restriction of sequence of movement, because according to the embodiment of the present invention, some step can use other suitable
Sequence or simultaneously carry out.Secondly, those skilled in the art also should know, is retouched in description
The embodiment stated belongs to preferred embodiment, and the involved action not necessarily present invention implements
Necessary to example.
Fig. 2 is the assessment dress of the wheel strength of the rail transit locomotive that one embodiment of the invention provides
The structural representation put.As in figure 2 it is shown, the rail transit locomotive that one embodiment of the invention provides
The apparatus for evaluating of wheel strength include:
Collecting unit 201, for the wheel to be assessed default calculating parameter input extremely preset
Model, to realize automatically loading of car load and automatically creating of various working, and gathers
Obtaining the coordinate under various working of the key point on wheel to be assessed, stress tensor and master should
Power；
Computing unit 202, is used for according to the key point on wheel to be assessed under various working
Coordinate, stress tensor and principal stress are calculated the mean stress of described key point, stress amplitude
Value, the range of stress and equivalent stress；
Judging unit 203, for the mean stress according to described key point, stress amplitude, answers
Power scope and equivalent stress judge described mean stress, stress amplitude, the range of stress and
Whether equivalent stress is in default scope；
Assessment unit 204, for judging described mean stress, stress amplitude, the range of stress
And in the case of equivalent stress is in default scope, then assess described wheel to be assessed
Intensity is safe operating mode.
In an alternate embodiment of the present invention, described judging unit 203, it is additionally operable to:
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress do not exist
In the case of in the scope preset, then the intensity assessing described wheel to be assessed is fault condition.
In an alternate embodiment of the present invention, described computing unit 202, specifically for:
Calculate according to described key point stress tensor under various working and obtain described key point
Equivalent stress under various working；
It is calculated described key point according to described key point principal stress under various working to exist
The direction cosines of principal stress maximum under various working；
By described key point other direction principal stress under various working respectively with each work
Project on the direction of the principal stress maximum that condition is corresponding, ask for projection value；
According to described projection value search described key point projection maximum under each operating mode and
Projection minima；
Calculate according to described key point projection maximum under each operating mode and projection minima
Obtain described key point mean stress under this operating mode, stress amplitude and the range of stress.
It should be noted that the commenting of wheel strength of the rail transit locomotive that the present invention is provided
The wheel estimating the rail transit locomotive that the detail that device further relates to provides in the present invention is strong
The appraisal procedure of degree is described in detail, is not repeating at this.
It should be noted that, in all parts of the system of the present invention, to be realized according to it
Function and parts therein have been carried out logical partitioning, but, the present invention is not only restricted to this, can
As required all parts repartitioned or to combine, for example, it is possible to by some portions
Part is combined as single parts, or some parts can be further broken into more sub-portion
Part.
The all parts embodiment of the present invention can realize with hardware, or with at one or many
The software module run on individual processor realizes, or realizes with combinations thereof.This area
It will be appreciated by the skilled person that microprocessor or digital signal processor can be used in practice
(DSP) one of some or all parts in system according to embodiments of the present invention is realized
A little or repertoire.The present invention is also implemented as performing method as described herein
Part or all equipment or device program (such as, computer program and computer journey
Sequence product).The program of such present invention of realization can store on a computer-readable medium,
Or can be to have the form of one or more signal.Such signal can be from the Internet net
Upper download of standing obtains, or provides on carrier signal, or provides with any other form.
The present invention will be described rather than enters the present invention to it should be noted above-described embodiment
Row limits, and those skilled in the art are without departing from the scope of the appended claims
Alternative embodiment can be designed.In the claims, any ginseng between bracket should not will be located in
Examine symbol construction and become limitations on claims.Word " comprises " not exclude the presence of and is not listed in right
Element in requirement or step.Word "a" or "an" before being positioned at element does not excludes the presence of
Multiple such elements.The present invention can by means of include some different elements hardware and
Realize by means of properly programmed computer.If listing the unit claim of equipment for drying
In, several in these devices can be specifically to be embodied by same hardware branch.Word
First, second and third use do not indicate that any order.Can be by these word explanations
For title.
Embodiment of above is only suitable to illustrate the present invention, and not limitation of the present invention is relevant
The those of ordinary skill of technical field, without departing from the spirit and scope of the present invention,
Can also make a variety of changes and modification, the technical scheme of the most all equivalents falls within the present invention
Category, the scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. the appraisal procedure of the wheel strength of a rail transit locomotive, it is characterised in that institute
The method of stating includes:
By default calculating parameter input to the wheel model to be assessed preset, to realize vehicle
Automatically loading of load and automatically creating of various working, and collect on wheel to be assessed
Key point coordinate, stress tensor and principal stress under various working；
According to the coordinate under various working of the key point on wheel to be assessed, stress tensor and
Principal stress be calculated the mean stress of described key point, stress amplitude, the range of stress and
Equivalent stress；
Mean stress according to described key point, stress amplitude, the range of stress and etc. effect
Power judges that whether described mean stress, stress amplitude, the range of stress and equivalent stress are in advance
In the range of if；
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress are in advance
If in the case of in the range of, then the intensity assessing described wheel to be assessed is safe operating mode.
The appraisal procedure of the wheel strength of rail transit locomotive the most according to claim 1,
It is characterized in that, described method also includes:
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress do not exist
In the case of in the scope preset, then the intensity assessing described wheel to be assessed is fault condition.
The appraisal procedure of the wheel strength of rail transit locomotive the most according to claim 1,
It is characterized in that, the described wheel model to be assessed that default calculating parameter input is extremely preset,
To realize automatically loading of car load and automatically creating of various working, and collect and treat
Before the key point on assessment wheel coordinate, stress tensor and principal stress under various working,
Described method also includes:
Design parameter according to described wheel to be assessed is set up and is obtained the three of described wheel to be assessed
Dimension module；
Threedimensional model to described wheel to be assessed carries out the automatic division of finite element grid,
To described wheel model to be assessed.
The appraisal procedure of the wheel strength of rail transit locomotive the most according to claim 3,
It is characterized in that, described design parameter includes wheel cross section parameter, the anglec of rotation and control
Parameter.
The appraisal procedure of the wheel strength of rail transit locomotive the most according to claim 1,
It is characterized in that, described coordinate according to the key point on wheel to be assessed under various working,
Stress tensor and principal stress are calculated the mean stress of described key point, stress amplitude, answer
Power scope and equivalent stress, including:
Calculate according to described key point stress tensor under various working and obtain described key point
Equivalent stress under various working；
It is calculated described key point according to described key point principal stress under various working to exist
The direction cosines of principal stress maximum under various working；
By described key point other direction principal stress under various working respectively with each work
Project on the direction of the principal stress maximum that condition is corresponding, ask for projection value；
According to described projection value search described key point projection maximum under each operating mode and
Projection minima；
Calculate according to described key point projection maximum under each operating mode and projection minima
Obtain described key point mean stress under this operating mode, stress amplitude and the range of stress.
The appraisal procedure of the wheel strength of rail transit locomotive the most according to claim 1,
It is characterized in that, described method also includes:
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress do not exist
In the case of in the scope preset, adjust the design parameter of described wheel to be assessed, so that
The intensity of described wheel to be assessed is in safe operating mode.
The assessment of the wheel strength of rail transit locomotive the most according to claim 1 and 2
Method, it is characterised in that described method also includes:
The assessment report of described wheel to be assessed is automatically generated according to assessment result,
Wherein, described assessment report includes the stress cloud of the key point on described wheel to be assessed
Figure, stress result and safety coefficient.
8. the apparatus for evaluating of the wheel strength of a rail transit locomotive, it is characterised in that institute
State device to include:
Collecting unit, for the wheel mould to be assessed default calculating parameter input extremely preset
Type, to realize automatically loading of car load and automatically creating of various working, and gathers
The key point on wheel to be assessed coordinate, stress tensor and principal stress under various working；
Computing unit, for according to the seat under various working of the key point on wheel to be assessed
Mark, stress tensor and principal stress be calculated the mean stress of described key point, stress amplitude,
The range of stress and equivalent stress；
Judging unit, for the mean stress according to described key point, stress amplitude, stress
Scope and equivalent stress judge described mean stress, stress amplitude, the range of stress and etc.
Whether efficacy is in default scope；
Assessment unit, for judge described mean stress, stress amplitude, the range of stress with
And in the case of equivalent stress is in default scope, then assess the strong of described wheel to be assessed
Degree is safe operating mode.
The apparatus for evaluating of the wheel strength of rail transit locomotive the most according to claim 8,
It is characterized in that described judging unit is additionally operable to:
Judging that described mean stress, stress amplitude, the range of stress and equivalent stress do not exist
In the case of in the scope preset, then the intensity assessing described wheel to be assessed is fault condition.
The assessment dress of the wheel strength of rail transit locomotive the most according to claim 8
Put, it is characterised in that described computing unit, specifically for:
Calculate according to described key point stress tensor under various working and obtain described key point
Equivalent stress under various working；
It is calculated described key point according to described key point principal stress under various working to exist
The direction cosines of principal stress maximum under various working；
By described key point other direction principal stress under various working respectively with each work
Project on the direction of the principal stress maximum that condition is corresponding, ask for projection value；
According to described projection value search described key point projection maximum under each operating mode and
Projection minima；
Calculate according to described key point projection maximum under each operating mode and projection minima
Obtain described key point mean stress under this operating mode, stress amplitude and the range of stress.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110705137A (en) * | 2019-08-22 | 2020-01-17 | 中车青岛四方机车车辆股份有限公司 | Stress amplitude and mean value determining method and device |
| CN112414689A (en) * | 2020-11-17 | 2021-02-26 | 中车青岛四方机车车辆股份有限公司 | Data processing system and method |
| CN113591267A (en) * | 2021-06-17 | 2021-11-02 | 东风汽车集团股份有限公司 | Analysis method and device for suspension strength of gearbox shell |
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| CN112414689B (en) * | 2020-11-17 | 2022-07-15 | 中车青岛四方机车车辆股份有限公司 | Data processing system and method |
| CN113591267A (en) * | 2021-06-17 | 2021-11-02 | 东风汽车集团股份有限公司 | Analysis method and device for suspension strength of gearbox shell |
| CN113591267B (en) * | 2021-06-17 | 2023-12-19 | 东风汽车集团股份有限公司 | Analysis method and device for suspension strength of gearbox shell |
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