CN106021688B - A kind of appraisal procedure and device of the wheel strength of rail transit locomotive - Google Patents
A kind of appraisal procedure and device of the wheel strength of rail transit locomotive Download PDFInfo
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- CN106021688B CN106021688B CN201610321829.0A CN201610321829A CN106021688B CN 106021688 B CN106021688 B CN 106021688B CN 201610321829 A CN201610321829 A CN 201610321829A CN 106021688 B CN106021688 B CN 106021688B
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- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G06F30/00—Computer-aided design [CAD]
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Abstract
The present invention discloses the appraisal procedure and device of a kind of wheel strength of rail transit locomotive.Wherein, the described method includes: preset calculating parameter is input to preset wheel model to be assessed, to realize the automatic load of car load and automatically creating for various working, and collect coordinate, stress tensor and principal stress of the key point on wheel to be assessed under various working；Mean stress, stress amplitude, the range of stress and the equivalent stress of key point are calculated according to coordinate, stress tensor and principal stress of the key point on wheel to be assessed under various working；Judge mean stress, stress amplitude, the range of stress and equivalent stress whether in default range；In the case where judging that mean stress, stress amplitude, the range of stress and equivalent stress are in default range, then the intensity for assessing wheel to be assessed is safe operating condition.Through the invention, it overcomes in the prior art since there are analyze the skimble-scamble problem of result caused by individual difference by emulation personnel.
Description
Technical field
The present invention relates to rail transit locomotive fields, and in particular, to a kind of wheel strength of rail transit locomotive is commented
Estimate method and device.
Background technique
It is assessed in existing rail transit rolling stock wheel strength, main flow is the emulation personnel of profession by setting
The CAD model for counting teacher's offer carries out manual grid division, then carries out manual loading and establish largely to calculate operating condition, to complexity
Calculated result needs a large amount of time to be handled, that is, wastes a large amount of manpowers, is also easy error.Especially for car wheel structure and
Stress, the stress result calculated need to carry out special processing, there is very big technical difficulty, are that manpower can not overcome
's.The processing of big data in treatment process, and now during wheel strength assessment, the technical problem faced especially easily goes out
It is wrong.It is to be checked out in face of tens operating conditions of output, 4 kinds or more stress result cloud atlas and list for establishment report
Assessment result at the node of measuring car wheel requires to spend a large amount of manpower, also error-prone.
Generally speaking, human intervention situation is excessive in the prior art, and divides caused by existing because of emulation personnel's individual difference
Analyse the skimble-scamble problem of result.
Summary of the invention
The object of the present invention is to provide a kind of appraisal procedure of the wheel strength of rail transit locomotive and devices.Wherein,
The method can automatically be handled the data under each operating condition, not only be overcome in the prior art since emulation personnel deposit
The occurrence of analyzing the skimble-scamble problem of result caused by individual difference, and also reducing human intervention.
To achieve the goals above, the present invention provides a kind of appraisal procedure of the wheel strength of rail transit locomotive.It is described
Method includes:
Preset calculating parameter is input to preset wheel model to be assessed, with realize car load it is automatic load and
Various working automatically creates, and collects coordinate of the key point on wheel to be assessed under various working, stress tensor
And principal stress；
Institute is calculated according to coordinate, stress tensor and principal stress of the key point on wheel to be assessed under various working
State mean stress, stress amplitude, the range of stress and the equivalent stress of key point；
Judge described averagely to answer according to the mean stress of the key point, stress amplitude, the range of stress and equivalent stress
Whether power, stress amplitude, the range of stress and equivalent stress are in default range；
Judging the case where mean stress, stress amplitude, the range of stress and equivalent stress are in default range
Under, then the intensity for assessing the wheel to be assessed is safe operating condition.
Optionally, the method also includes:
Judging the feelings of the mean stress, stress amplitude, the range of stress and equivalent stress not in default range
Under condition, then the intensity for assessing the wheel to be assessed is fault condition.
Optionally, described that preset calculating parameter is input to preset wheel model to be assessed, to realize car load
Automatic load and various working automatically create, and collect seat of the key point under various working on wheel to be assessed
Before mark, stress tensor and principal stress, the method also includes:
It is established to obtain the threedimensional model of the wheel to be assessed according to the design parameter of the wheel to be assessed；
The automatic division that finite element grid is carried out to the threedimensional model of the wheel to be assessed, obtains the wheel to be assessed
Model.
Optionally, the design parameter includes wheel cross section parameter, rotation angle and control parameter.
Optionally, coordinate, stress tensor and master of the key point according on wheel to be assessed under various working answer
Mean stress, stress amplitude, the range of stress and the equivalent stress of the key point is calculated in power, comprising:
Calculate to obtain the key point under various working in the stress tensor under various working according to the key point
Equivalent stress；
Key point master under various working is calculated in the principal stress under various working according to the key point to answer
The direction cosines of power maximum value；
By other direction principal stresses of the key point under various working respectively in principal stress corresponding with each operating condition
It is projected on the direction of maximum value, seeks projection value；
Projection maximum value of the key point under each operating condition and projection minimum value are searched according to the projection value；
The key point is calculated according to projection maximum value of the key point under each operating condition and projection minimum value
Mean stress, stress amplitude and the range of stress under the operating condition.
Optionally, the method also includes:
Judging the feelings of the mean stress, stress amplitude, the range of stress and equivalent stress not in default range
Under condition, the design parameter of the wheel to be assessed is adjusted, so that the intensity of the wheel to be assessed is in safe operating condition.
Optionally, the method also includes:
The assessment report of the wheel to be assessed is automatically generated according to assessment result,
Wherein, the assessment report include the Stress Map of the key point on the wheel to be assessed, stress result and
Safety coefficient.
Correspondingly, the present invention also provides a kind of assessment devices of the wheel strength of rail transit locomotive.Described device includes:
Acquisition unit, for preset calculating parameter to be input to preset wheel model to be assessed, to realize that vehicle carries
The automatic load of lotus and automatically creating for various working, and the key point on wheel to be assessed is collected under various working
Coordinate, stress tensor and principal stress；
Computing unit, for coordinate, stress tensor and the master according to the key point on wheel to be assessed under various working
Stress calculation obtains mean stress, stress amplitude, the range of stress and the equivalent stress of the key point；
Judging unit, for being sentenced according to the mean stress of the key point, stress amplitude, the range of stress and equivalent stress
Whether the mean stress, stress amplitude, the range of stress and the equivalent stress of breaking are in default range；
Assessment unit, for judging the mean stress, stress amplitude, the range of stress and equivalent stress preset
In the case where in range, then the intensity for assessing the wheel to be assessed is safe operating condition.
Optionally, the judging unit, is also used to:
Judging the feelings of the mean stress, stress amplitude, the range of stress and equivalent stress not in default range
Under condition, then the intensity for assessing the wheel to be assessed is fault condition.
Optionally, the computing unit, is specifically used for:
Calculate to obtain the key point under various working in the stress tensor under various working according to the key point
Equivalent stress；
Key point master under various working is calculated in the principal stress under various working according to the key point to answer
The direction cosines of power maximum value；
By other direction principal stresses of the key point under various working respectively in principal stress corresponding with each operating condition
It is projected on the direction of maximum value, seeks projection value；
Projection maximum value of the key point under each operating condition and projection minimum value are searched according to the projection value；
The key point is calculated according to projection maximum value of the key point under each operating condition and projection minimum value
Mean stress, stress amplitude and the range of stress under the operating condition.
Through the above technical solutions, preset calculating parameter is input to preset wheel model to be assessed, to realize vehicle
The automatic load of load and automatically creating for various working, and the key point on wheel to be assessed is collected in various working
Under coordinate, stress tensor and principal stress；And coordinate, stress according to the key point on wheel to be assessed under various working
Mean stress, stress amplitude, the range of stress and the equivalent stress of the key point is calculated in amount and principal stress；And according to institute
Mean stress, stress amplitude, the range of stress and the equivalent stress for stating key point judge the mean stress, stress amplitude, answer
Whether power range and equivalent stress are in default range；Judge the mean stress, stress amplitude, the range of stress and
In the case that equivalent stress is in default range, then the intensity for assessing the wheel to be assessed is safe operating condition, is not only overcome
In the prior art since emulation personnel are there are analyzing result skimble-scamble problem caused by individual difference, and also reduce people
The occurrence of to intervene, provides simple, fast appraisal procedure to emulation personnel.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is the flow chart of the appraisal procedure of the wheel strength for the rail transit locomotive that one embodiment of the invention provides；
Fig. 2 is the structural representation of the assessment device of the wheel strength for the rail transit locomotive that one embodiment of the invention provides
Figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is the flow chart of the appraisal procedure of the wheel strength for the rail transit locomotive that one embodiment of the invention provides.Such as
Shown in Fig. 1, the appraisal procedure of the wheel strength for the rail transit locomotive that one embodiment of the invention provides includes:
In step s101, preset calculating parameter is input to preset wheel model to be assessed, to realize that vehicle carries
The automatic load of lotus and automatically creating for various working, and the key point on wheel to be assessed is collected under various working
Coordinate, stress tensor and principal stress.
Specifically, before this step, the method also includes: established according to the design parameter of the wheel to be assessed
To the threedimensional model of the wheel to be assessed；Cuing open automatically for finite element grid is carried out to the threedimensional model of the wheel to be assessed
Point, obtain the wheel model to be assessed.Wherein, the design parameter includes wheel cross section parameter, rotation angle and control
Parameter.
Can control wheel cross section parameter by input, realize automatically generating for wheel section, at the same parameterize foundation with
Matched axle partial cross section, pass through setting rotation angle, generate threedimensional model.Meanwhile according to the specific of wheel to be detected
Structure establishes the threedimensional model on wheel such as pin hole by setting control parameter.Then, the finite element net of threedimensional model is realized
The automatic division of lattice.
Then, in step s 102, the coordinate according to the key point on wheel to be assessed under various working, stress tensor
And mean stress, stress amplitude, the range of stress and the equivalent stress of the key point is calculated in principal stress.
Specifically, which includes: to calculate to obtain the pass according to stress tensor of the key point under various working
Equivalent stress of the key point under various working；The key is calculated according to principal stress of the key point under various working
The direction cosines of point principal stress maximum value under various working；By other direction principal stresses of the key point under various working
It is projected on the direction of principal stress maximum value corresponding with each operating condition respectively, seeks projection value；According to the projection value
Search projection maximum value of the key point under each operating condition and projection minimum value；According to the key point under each operating condition
Projection maximum value and projection minimum value mean stress of the key point under the operating condition, stress amplitude is calculated and answers
Power range.
And then, in step s 103, according to the mean stress of the key point, stress amplitude, the range of stress and wait
Whether efficacy judges the mean stress, stress amplitude, the range of stress and equivalent stress in default range.
Specifically, for each key point, the surrender that the equivalent stress under each operating condition is respectively less than wheel material is strong
Degree, then illustrate the equivalent stress of key point within the scope of preset.In other words, the static strength of wheel is assessed qualified.For
Each key point, mean stress, stress amplitude and the range of stress under each operating condition in preset data area,
Then illustrate the mean stress, stress amplitude and the range of stress of key point within the scope of preset.In other words, wheel is tired
Labor strength assessment is qualified.
Finally, in step S104, judging that the mean stress, stress amplitude, the range of stress and equivalent stress exist
In the case where in default range, then the intensity for assessing the wheel to be assessed is safe operating condition.
Specifically, judging the mean stress, stress amplitude, the range of stress and equivalent stress not in preset range
In the case where interior, then the intensity for assessing the wheel to be assessed is fault condition.
Preferably, the method also includes: judging the mean stress, stress amplitude, the range of stress and waiting effects
In the case that power is not in default range, the design parameter of the wheel to be assessed is adjusted, so that the wheel to be assessed
Intensity be in safe operating condition.It is thereby achieved that the automatic cycle assessment of wheel, until the wheel of design meets intensity requirement is
Only.
Preferably, the method also includes: the assessment report of the wheel to be assessed is automatically generated according to assessment result,
In, the assessment report includes Stress Map, stress result and the safety coefficient of the key point on the wheel to be assessed.By
This, emulation personnel can intuitively understand the assessment result of wheel.
Preset calculating parameter is input to preset wheel model to be assessed by the present embodiment, with realize car load from
Dynamic load and various working automatically create, and collect coordinate of the key point on wheel to be assessed under various working,
Stress tensor and principal stress；And it is answered according to coordinate, stress tensor and master of the key point on wheel to be assessed under various working
Mean stress, stress amplitude, the range of stress and the equivalent stress of the key point is calculated in power；And according to the key point
Mean stress, stress amplitude, the range of stress and equivalent stress judge the mean stress, stress amplitude, the range of stress with
And whether equivalent stress is in default range；Judging the mean stress, stress amplitude, the range of stress and equivalent stress
In the case where in default range, then the intensity for assessing the wheel to be assessed is safe operating condition, not only overcomes existing skill
Since emulation personnel are there are the skimble-scamble problem of result is analyzed caused by individual difference in art, and human intervention feelings are also reduced
The generation of condition provides simple, fast appraisal procedure to emulation personnel.
For embodiment of the method, for simple description, therefore, it is stated as a series of action combinations, but this field
Technical staff should be aware of, and embodiment of that present invention are not limited by the describe sequence of actions, because implementing according to the present invention
Example, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art should also know that, specification
Described in embodiment belong to preferred embodiment, the actions involved are not necessarily necessary for embodiments of the present invention.
Fig. 2 is the structural representation of the assessment device of the wheel strength for the rail transit locomotive that one embodiment of the invention provides
Figure.As shown in Fig. 2, the assessment device of the wheel strength for the rail transit locomotive that one embodiment of the invention provides includes:
Acquisition unit 201, for preset calculating parameter to be input to preset wheel model to be assessed, to realize vehicle
The automatic load of load and automatically creating for various working, and the key point on wheel to be assessed is collected under various working
Coordinate, stress tensor and principal stress；
Computing unit 202, for according to coordinate of the key point on wheel to be assessed under various working, stress tensor and
Mean stress, stress amplitude, the range of stress and the equivalent stress of the key point is calculated in principal stress；
Judging unit 203, for according to the mean stress of the key point, stress amplitude, the range of stress and waiting effects
Whether power judges the mean stress, stress amplitude, the range of stress and equivalent stress in default range；
Assessment unit 204, for judging the mean stress, stress amplitude, the range of stress and equivalent stress pre-
If in the case where in the range of, then the intensity for assessing the wheel to be assessed is safe operating condition.
In an alternate embodiment of the present invention, the judging unit 203 is also used to:
Judging the feelings of the mean stress, stress amplitude, the range of stress and equivalent stress not in default range
Under condition, then the intensity for assessing the wheel to be assessed is fault condition.
In an alternate embodiment of the present invention, the computing unit 202 is specifically used for:
Calculate to obtain the key point under various working in the stress tensor under various working according to the key point
Equivalent stress；
Key point master under various working is calculated in the principal stress under various working according to the key point to answer
The direction cosines of power maximum value；
By other direction principal stresses of the key point under various working respectively in principal stress corresponding with each operating condition
It is projected on the direction of maximum value, seeks projection value；
Projection maximum value of the key point under each operating condition and projection minimum value are searched according to the projection value；
The key point is calculated according to projection maximum value of the key point under each operating condition and projection minimum value
Mean stress, stress amplitude and the range of stress under the operating condition.
It should be noted that the assessment device of the wheel strength of rail transit locomotive provided by the invention is further related to
Detail is described in detail in the appraisal procedure of the wheel strength of rail transit locomotive provided by the invention, herein
It is not repeating.
It should be noted that in all parts of system of the invention, according to the function that it to be realized to therein
Component has carried out logical partitioning, and still, the present invention is not only restricted to this, can according to need all parts are repartitioned or
Person's combination for example, can be single component by some component combinations, or some components can be further broken into more
Subassembly.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice
Microprocessor or digital signal processor (DSP) Lai Shixian according to the system in the embodiment of the present invention in some or all portions
The some or all functions of part.The present invention is also implemented as a part or complete for executing method as described herein
The device or device program (for example, computer program and computer program product) in portion.It is such to realize program of the invention
It can store on a computer-readable medium, or may be in the form of one or more signals.Such signal can be with
It downloads from internet website, is perhaps provided on the carrier signal or is provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Embodiment of above is only suitable for illustrating the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (8)
1. a kind of appraisal procedure of the wheel strength of rail transit locomotive, which is characterized in that the described method includes:
Preset calculating parameter is input to preset wheel model to be assessed, with realize car load it is automatic load and it is a variety of
Operating condition automatically creates, and collects coordinate, stress tensor and master of the key point on wheel to be assessed under various working
Stress；
The pass is calculated according to coordinate, stress tensor and principal stress of the key point on wheel to be assessed under various working
Mean stress, stress amplitude, the range of stress and the equivalent stress of key point；
The mean stress is judged according to the mean stress of the key point, stress amplitude, the range of stress and equivalent stress, is answered
Whether power amplitude, the range of stress and equivalent stress are in default range；
In the case where judging that the mean stress, stress amplitude, the range of stress and equivalent stress are in default range, then
The intensity for assessing the wheel to be assessed is safe operating condition；
Institute is calculated in coordinate, stress tensor and principal stress of the key point according on wheel to be assessed under various working
State mean stress, stress amplitude, the range of stress and the equivalent stress of key point, comprising:
It in the stress tensor under various working calculates to obtain the key point according to the key point equivalent under various working
Stress；
In the principal stress under various working the key point being calculated under various working according to the key point, principal stress is most
The direction cosines being worth greatly；
Other direction principal stresses of the key point under various working are maximum in principal stress corresponding with each operating condition respectively
It is projected on the direction of value, seeks projection value；
Projection maximum value of the key point under each operating condition and projection minimum value are searched according to the projection value；
The key point is calculated at this according to projection maximum value of the key point under each operating condition and projection minimum value
Mean stress, stress amplitude and the range of stress under operating condition.
2. the appraisal procedure of the wheel strength of rail transit locomotive according to claim 1, which is characterized in that the method
Further include:
In the case where judging the mean stress, stress amplitude, the range of stress and equivalent stress not in default range,
The intensity for then assessing the wheel to be assessed is fault condition.
3. the appraisal procedure of the wheel strength of rail transit locomotive according to claim 1, which is characterized in that it is described will be pre-
If calculating parameter be input to preset wheel model to be assessed, with realize car load automatic load and various working from
Dynamic creation, and the key point on wheel to be assessed is collected before coordinate, stress tensor and the principal stress under various working,
The method also includes:
It is established to obtain the threedimensional model of the wheel to be assessed according to the design parameter of the wheel to be assessed；
The automatic division that finite element grid is carried out to the threedimensional model of the wheel to be assessed, obtains the wheel mould to be assessed
Type.
4. the appraisal procedure of the wheel strength of rail transit locomotive according to claim 3, which is characterized in that the design
Parameter includes wheel cross section parameter, rotation angle and control parameter.
5. the appraisal procedure of the wheel strength of rail transit locomotive according to claim 1, which is characterized in that the method
Further include:
In the case where judging the mean stress, stress amplitude, the range of stress and equivalent stress not in default range,
The design parameter of the wheel to be assessed is adjusted, so that the intensity of the wheel to be assessed is in safe operating condition.
6. the appraisal procedure of the wheel strength of rail transit locomotive according to claim 1 or 2, which is characterized in that described
Method further include:
The assessment report of the wheel to be assessed is automatically generated according to assessment result,
Wherein, the assessment report includes Stress Map, stress result and the safety of the key point on the wheel to be assessed
Coefficient.
7. a kind of assessment device of the wheel strength of rail transit locomotive, which is characterized in that described device includes:
Acquisition unit, for preset calculating parameter to be input to preset wheel model to be assessed, to realize car load
Automatic load is automatically created with various working, and collects seat of the key point under various working on wheel to be assessed
Mark, stress tensor and principal stress；
Computing unit, for coordinate, stress tensor and the principal stress according to the key point on wheel to be assessed under various working
Mean stress, stress amplitude, the range of stress and the equivalent stress of the key point is calculated；
Judging unit, for judging institute according to the mean stress of the key point, stress amplitude, the range of stress and equivalent stress
Mean stress, stress amplitude, the range of stress and equivalent stress are stated whether in default range；
Assessment unit, for judging the mean stress, stress amplitude, the range of stress and equivalent stress in preset range
In the case where interior, then the intensity for assessing the wheel to be assessed is safe operating condition；
The computing unit, is specifically used for:
It in the stress tensor under various working calculates to obtain the key point according to the key point equivalent under various working
Stress；
In the principal stress under various working the key point being calculated under various working according to the key point, principal stress is most
The direction cosines being worth greatly；
Other direction principal stresses of the key point under various working are maximum in principal stress corresponding with each operating condition respectively
It is projected on the direction of value, seeks projection value；
Projection maximum value of the key point under each operating condition and projection minimum value are searched according to the projection value；
The key point is calculated at this according to projection maximum value of the key point under each operating condition and projection minimum value
Mean stress, stress amplitude and the range of stress under operating condition.
8. the assessment device of the wheel strength of rail transit locomotive according to claim 7, which is characterized in that the judgement
Unit is also used to:
In the case where judging the mean stress, stress amplitude, the range of stress and equivalent stress not in default range,
The intensity for then assessing the wheel to be assessed is fault condition.
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| CN110705137B (en) * | 2019-08-22 | 2023-04-21 | 中车青岛四方机车车辆股份有限公司 | Method and device for determining stress amplitude and mean value |
| 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 |
| 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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