CN110287633A - A kind of fatigue analysis method and device of After-treatment technics bracket - Google Patents
A kind of fatigue analysis method and device of After-treatment technics bracket Download PDFInfo
- Publication number
- CN110287633A CN110287633A CN201910589617.4A CN201910589617A CN110287633A CN 110287633 A CN110287633 A CN 110287633A CN 201910589617 A CN201910589617 A CN 201910589617A CN 110287633 A CN110287633 A CN 110287633A
- Authority
- CN
- China
- Prior art keywords
- bracket
- test platform
- coupled rigid
- post
- fatigue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- 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
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/04—Ageing analysis or optimisation against ageing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of fatigue analysis methods of After-treatment technics bracket, comprising: the finite element model of building post-processing bracket to be analyzed；The elastomeric model for constructing the post-processing bracket to be analyzed, constructs Coupled Rigid-flexible virtual test platform according to the elastomeric model；Acceleration signal is acquired, the acceleration signal is converted to the displacement signal of movement device；The movement device displacement signal is passed to the Coupled Rigid-flexible virtual test platform to emulate, obtains the power loading spectrum of the Coupled Rigid-flexible virtual test platform；Analysis of fatigue is carried out according to the power loading spectrum.The above method, by the elastomeric model for constructing post-processing bracket to be analyzed, and it is emulated according to elastomeric model building Coupled Rigid-flexible virtual test platform, obtain the power loading spectrum of Coupled Rigid-flexible virtual test platform, analysis of fatigue is carried out according to the power loading spectrum, power loading spectrum is higher compared to experience load accuracy rate, and therefore, analysis of fatigue result accuracy rate can also improve.
Description
Technical field
The present invention relates to engine art more particularly to a kind of fatigue analysis methods and dress of After-treatment technics bracket
It sets.
Background technique
With further increasing for diesel emission standard, after-treatment system structure gradually tends to be complicated, post-processes assembly,
Especially large diesel engine, quality are continuously increased, and the arrangement of post-processing assembly on the engine has brought a lot of difficulties；It is right in design
The Fatigue Life Assessment of bracket is post-processed, load input uses empirical value, seeks to the post-processing lower position of stent fatigue life
It sets, then carries out reinforcement design, to meet its fatigue behaviour.
Inventor carries out the study found that experience load is often overly conservative, empirically existing fatigue analysis method
Load, which carries out analysis of fatigue, causes the accuracy rate of the result of analysis of fatigue low, and for post-processing bracket by excessive reinforcement, post-processing is total
Increase at quality, is difficult to install, while improving cost.
Summary of the invention
In view of this, the present invention provides the fatigue analysis method and device of a kind of After-treatment technics bracket, to solve
Experience load is often overly conservative in the prior art, and empirically load carries out the standard that analysis of fatigue leads to the result of analysis of fatigue
True rate is low, and post-processing bracket is post-processed assembly quality and increased, is difficult to install by excessive reinforcement, while improving asking for cost
Topic, concrete scheme are as follows:
A kind of fatigue analysis method of After-treatment technics bracket, comprising:
Construct the finite element model of post-processing bracket to be analyzed；
The elastomeric model of the post-processing bracket to be analyzed is constructed, it is empty according to elastomeric model building Coupled Rigid-flexible
Quasi- testing stand；
Acceleration signal is acquired, the acceleration signal is converted to the displacement signal of movement device；
The movement device displacement signal is passed to the Coupled Rigid-flexible virtual test platform to emulate, is obtained described hard and soft
Couple the power loading spectrum of virtual test platform；
Analysis of fatigue is carried out according to the power loading spectrum.
Above-mentioned method, optionally, further includes:
When the Coupled Rigid-flexible virtual test platform, which constructs, to be completed, the Coupled Rigid-flexible virtual test platform is calibrated.
Above-mentioned method, optionally, constructing Coupled Rigid-flexible virtual test platform according to the elastomeric model includes:
Building and the matched vertical movement device 1 of the elastomeric model, longitudinal action device 2, crosswise movement device 3, testing stand
4, lower bracket 5, upper bracket 6, connecting rod 7, upper bushing 8, lower bushing 9 and post-processing assembly 10, wherein the lower bracket 5, described
Upper bracket 6 and the connecting rod 7 form the elastomeric model,
Wherein:
The lower bracket 5 is used with the testing stand 4 and is fixedly connected；
The lower bracket 5 and the connecting rod 7 are connected by the upper bushing 8；
The upper bracket 6 and the connecting rod 7 are connected by the lower bushing 9；
The post-processing assembly 10 is used with the upper bracket 6 and is fixedly connected.
Above-mentioned method, optionally, the power loading spectrum for obtaining the Coupled Rigid-flexible virtual test platform includes:
Obtain pre-set first excitation point in the finite element model；
The power loading spectrum of the second excitation point is obtained in the Coupled Rigid-flexible virtual test platform according to the first excitation point,
Wherein, the first excitation point is identical as the quantity of the second excitation point and there are the first excitation point of corresponding relationship and second
Motivate the position and direction of point identical.
Above-mentioned method, optionally, carrying out analysis of fatigue according to the power loading spectrum includes:
Obtain the S/N life curve of respective material and the specific loading stress distribution in the first excitation point；
Corresponding specific loading stress distribution and power loading spectrum are subjected to linear superposition, obtain stress strain response；
Carry out linear damage according to the stress strain response and the S/N life curve and accumulate operation, obtain it is described to
The fatigue damage of analysis post-processing bracket and service life.
A kind of analysis of fatigue device of After-treatment technics bracket, comprising:
First building module, for constructing the finite element model of post-processing bracket to be analyzed；
Second building module, for constructing the elastomeric model of the post-processing bracket to be analyzed, according to the flexible body
Model construction Coupled Rigid-flexible virtual test platform；
Conversion module is acquired, for acquiring acceleration signal, the displacement that the acceleration signal is converted to movement device is believed
Number；
Emulation obtains module, carries out for the movement device displacement signal to be passed to the Coupled Rigid-flexible virtual test platform
Emulation, obtains the power loading spectrum of the Coupled Rigid-flexible virtual test platform；
Analysis of fatigue module, for carrying out analysis of fatigue according to the power loading spectrum.
Above-mentioned device, optionally, further includes:
Calibration module, for virtually trying the Coupled Rigid-flexible when the Coupled Rigid-flexible virtual test platform constructs completion
Platform is tested to be calibrated.
Above-mentioned device, it is optionally, empty according to elastomeric model building Coupled Rigid-flexible in the second building module
Quasi- testing stand includes:
Construction unit is used for building and the matched vertical movement device 1 of the elastomeric model, longitudinal action device 2, laterally moves
Make device 3, testing stand 4, lower bracket 5, upper bracket 6, connecting rod 7, upper bushing 8, lower bushing 9 and post-processing assembly 10, wherein described
Lower bracket 5, the upper bracket 6 and the connecting rod 7 form the elastomeric model,
Wherein:
The lower bracket 5 is used with the testing stand 4 and is fixedly connected；
The lower bracket 5 and the connecting rod 7 are connected by the upper bushing 8；
The upper bracket 6 and the connecting rod 7 are connected by the lower bushing 9；
The post-processing assembly 10 is used with the upper bracket 6 and is fixedly connected.
Above-mentioned device, optionally, the emulation obtain the power load that the Coupled Rigid-flexible virtual test platform is obtained in module
Lotus is composed
First acquisition unit, for obtaining pre-set first excitation point in the finite element model；
Second acquisition unit, for obtaining second in the Coupled Rigid-flexible virtual test platform according to the first excitation point
Motivate the power loading spectrum of point, wherein the first excitation point is identical as the quantity of the second excitation point and there are corresponding relationships
First excitation point and second excitation put position and direction it is identical.
Above-mentioned device, optionally, the analysis of fatigue module includes:
Third acquiring unit, for obtaining the S/N life curve of respective material and being carried in the unit of the first excitation point
Lotus stress distribution；
Linear superposition unit is obtained for corresponding specific loading stress distribution and power loading spectrum to be carried out linear superposition
Stress strain response；
Damage measurement unit, it is tired for carrying out linear damage according to the stress strain response and the S/N life curve
Product operation obtains fatigue damage and the service life of the post-processing bracket to be analyzed.
Compared with prior art, the present invention includes the following advantages:
The invention discloses a kind of fatigue analysis methods of After-treatment technics bracket, comprising: constructs post-processing to be analyzed
The finite element model of bracket；The elastomeric model for constructing the post-processing bracket to be analyzed, constructs according to the elastomeric model
Coupled Rigid-flexible virtual test platform；Acceleration signal is acquired, the acceleration signal is converted to the displacement signal of movement device；By institute
It states movement device displacement signal to pass to the Coupled Rigid-flexible virtual test platform and emulated, obtains the Coupled Rigid-flexible virtual test
The power loading spectrum of platform；Analysis of fatigue is carried out according to the power loading spectrum.The above method, by constructing post-processing bracket to be analyzed
Elastomeric model, and emulated according to elastomeric model building Coupled Rigid-flexible virtual test platform, it obtains Coupled Rigid-flexible and virtually tries
The power loading spectrum for testing platform carries out analysis of fatigue according to the power loading spectrum, and power loading spectrum is higher compared to experience load accuracy rate,
Therefore, analysis of fatigue result accuracy rate can also improve.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
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 apparent 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
It obtains other drawings based on these drawings.
Fig. 1 is a kind of fatigue analysis method flow chart of After-treatment technics bracket disclosed in the embodiment of the present application；
Fig. 2 is a kind of Coupled Rigid-flexible virtual test platform schematic diagram disclosed in the embodiment of the present application；
Fig. 3 is a kind of fatigue analysis method execution process signal of After-treatment technics bracket disclosed in the embodiment of the present application
Figure；
Fig. 4 is a kind of analysis of fatigue device structural block diagram of After-treatment technics bracket disclosed in the embodiment of the present application.
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.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
The invention discloses the fatigue analysis methods and device of a kind of After-treatment technics bracket, apply after to engine
During the analysis of fatigue for handling bracket, wherein post-processing bracket includes: upper bracket, lower bracket and connecting rod, in the prior art
Analysis of fatigue, since experience load is often overly conservative, empirically load are carried out to post-processing bracket using experience loading spectrum
Carrying out analysis of fatigue causes the accuracy rate of the result of analysis of fatigue low, and post-processing bracket post-processes assembly matter by excessive reinforcement
Amount increases, is difficult to install, while improving cost, and to solve the above-mentioned problems, the present invention provides a kind of After-treatment technics
The fatigue analysis method of bracket, the execution process of the analysis method as shown in Figure 1, comprising steps of
The finite element model of S101, building post-processing bracket to be analyzed；
In the embodiment of the present invention, the geometric parameter of the post-processing bracket to be analyzed is obtained, according to the geometric parameter structure
The threedimensional model for building the post-processing bracket to be analyzed, is the threedimensional model added material attribute, wherein the material properties
Usually selected from material depot, it not and considers the factors such as defect and surface condition, compared with geometrical model, it have it is more not
Certainty.Then quantity, the position and direction of the first excitation of setting point, wherein the direction includes: up and down direction, right and left
To and front-rear direction.Apply the unit force load in three directions on the first excitation point.Post-processing assembly SCR passes through concentration
Quality point is simulated, and method for solving is discharged using inertia, each direction of each the first excitation point is a channel, meter
It calculates and obtains the stress distribution of the post-processing bracket to be analyzed, obtain the finite element model.
The elastomeric model of S102, the building post-processing bracket to be analyzed, construct hard and soft according to the elastomeric model
Couple virtual test platform；
In the embodiment of the present invention, by the post-processing bracket to be analyzed by modal synthesis method carry out solve be calculated with
The corresponding elastomeric model of the post-processing bracket to be analyzed.According to the elastomeric model, build and the elastomeric model
Corresponding Coupled Rigid-flexible virtual test platform, wherein in the Coupled Rigid-flexible virtual test platform in addition to the elastomeric model remaining
It is rigid model, the stress of the Coupled Rigid-flexible virtual test platform is simulated under corresponding operating condition, wherein described right
The operating condition answered is specified according to relevant enterprise standard.
The acceleration signal, is converted to the displacement signal of movement device by S103, acquisition acceleration signal；
In the embodiment of the present invention, the pumping signal of post-processing vibration endurance test is acquired, in the Coupled Rigid-flexible
The suitable position of testing stand in virtual test platform arranges acceleration transducer, wherein the suitable position can be according to specific
Situation or experience are set.It measures under different operating conditions, the acceleration loading spectrum in three directions, Test Cycle includes: vertical
Movement, pitch vibration, roll vibration, oscillation crosswise, the weaving around vertical direction, longitudinal movement, according to corresponding operating condition,
Total acceleration loading spectrum is intercepted to the convergence that successor virtual iterative calculation can be improved for the sub- loading spectrum under each operating condition
Property, according to specific operating condition, the resultant load of single sub- loading spectrum or arbitrary number quantum loading spectrum independent assortment can be used
Spectrum, the input as virtual iteration.Adams solver is called to input sub- loading spectrum or resultant load according to specific operating condition
Spectrum, application software virtually iterate to calculate, and obtain the movement device displacement signal under corresponding loading spectrum.
S104, it the movement device displacement signal is passed into the Coupled Rigid-flexible virtual test platform emulates, obtain institute
State the power loading spectrum of Coupled Rigid-flexible virtual test platform；
In the embodiment of the present invention, the movement device displacement signal is loaded into the Coupled Rigid-flexible virtual test platform and is imitated
Very, after-treatment system vibrates endurance test process under the specific operating condition of virtual appearing, extracts Coupled Rigid-flexible described in the operating condition and virtually tries
Test the power loading spectrum in three directions of identical second excitation point with the first excitation point in platform, the first excitation point and institute
State the second excitation point quantity it is identical and there are corresponding relationship first excitation point and second excitation put position and direction it is identical,
The specific loading to be applied in position, quantity and the direction of the second excitation point and finite element stimulation is extracted to keep
Unanimously, i.e., the loading spectrum in each direction of each the first excitation point of the described post-processing bracket to be analyzed and each channel
Stress distribution be one-to-one.
S105, analysis of fatigue is carried out according to the power loading spectrum.
In the embodiment of the present invention, the power loading spectrum of the first excitation point carries out linear with corresponding multichannel stress distribution
Superposition obtains the actual stress strain-responsive in the post-processing each channel of bracket to be analyzed under specific operating condition, passes through input pair
Answer material S/N life curve carry out linear damage accumulation calculate, wherein the corresponding material be manufacture it is described it is to be analyzed after
The material that bracket is selected is handled, and then obtains fatigue damage and service life knot of the post-processing bracket to be analyzed under each channel
Fruit, finally by under each channel fatigue damage and lifetime results be superimposed, always damaged and the service life.
The invention discloses a kind of fatigue analysis methods of After-treatment technics bracket, comprising: constructs post-processing to be analyzed
The finite element model of bracket；The elastomeric model for constructing the post-processing bracket to be analyzed, constructs according to the elastomeric model
Coupled Rigid-flexible virtual test platform；Acceleration signal is acquired, the acceleration signal is converted to the displacement signal of movement device；By institute
It states movement device displacement signal to pass to the Coupled Rigid-flexible virtual test platform and emulated, obtains the Coupled Rigid-flexible virtual test
The power loading spectrum of platform；Analysis of fatigue is carried out according to the power loading spectrum.The above method, by constructing post-processing bracket to be analyzed
Elastomeric model, and emulated according to elastomeric model building Coupled Rigid-flexible virtual test platform, it obtains Coupled Rigid-flexible and virtually tries
The power loading spectrum for testing platform carries out analysis of fatigue according to the power loading spectrum, and power loading spectrum is higher compared to experience load accuracy rate,
Therefore, analysis of fatigue result accuracy rate can also improve.
Schematic diagram such as Fig. 2 in the embodiment of the present invention, according to elastomeric model building Coupled Rigid-flexible virtual test platform
It is shown, comprising: with the matched vertical movement device 1 of the elastomeric model, longitudinal action device 2, crosswise movement device 3, testing stand 4,
Lower bracket 5, upper bracket 6, connecting rod 7, upper bushing 8, lower bushing 9 and post-processing assembly 10, wherein the lower bracket 5, it is described on
Bracket 6 and the connecting rod 7 form the elastomeric model,
Wherein: the quantity of the vertical movement device 1 be 3 for simulate the vertical motion of the testing stand 4, pitch vibration and
Roll vibration；
The quantity of the longitudinal action device is 1 for simulating the longitudinal movement of the testing stand 4；
The quantity of the crosswise movement device 3 is 2 cross for simulating the oscillation crosswise of the testing stand 4 and around vertical direction
Pendular motion；
Further include: lower bushing 9,4 connections of 1 upper bushing 8,4 of upper bracket 6,4 of lower bracket 5,1 of testing stand 4,1
Bar 7 and 1 post-processes assembly 10, and lower bracket 5, upper bracket 6, connecting rod 7 are modeled using flexible body file, upper bracket 6 and lower branch
Cushion between frame 5 is simulated using bushing, and 10 assembly of post-processing assembly is simulated with rigid spheres, and after assigning actual measurement
The quality and rotary inertia of processing.
The lower bracket 5 is used with the testing stand 4 and is fixedly connected；
The lower bracket 5 and the connecting rod 7 are connected by the upper bushing 8；
The upper bracket 6 and the connecting rod 7 are connected by the lower bushing 9；
The post-processing assembly 10 is used with the upper bracket 6 and is fixedly connected.
Further, by adjusting bushing property parameters, connecting rod property parameters, until Coupled Rigid-flexible virtual test platform is quiet
Cushion forces testing result in the bushing stress of equilibrium analysis, with vibration endurance test is almost the same, makes the described rigid of building
The load output result and reality of soft coupling virtual test platform are closer.
In the embodiment of the present invention, the overall execution process of the above method is as shown in Figure 3, wherein builds first described wait divide
The finite element model of analysis post-processing bracket calculates the post-processing bracket to be analyzed in the multichannel stress of the first excitation point
Distribution, provides input for Fatigue Life Assessment, and the flexible body mould of the post-processing bracket to be analyzed is generated by modal analysis method
Type constructs the Coupled Rigid-flexible virtual test platform according to the elastomeric model, acquires in the Coupled Rigid-flexible virtual test platform
The acceleration signal of testing stand 4 intercepts acceleration signal according to specific operating condition, and the Coupled Rigid-flexible is called virtually to try
Platform is tested, corresponding acceleration signal is inputted and carries out virtual iteration, obtain the displacement signal of movement device, displacement signal drive actions
Device obtains the Coupled Rigid-flexible virtual test platform in the power loading spectrum of the second excitation point, using the power loading spectrum as tired
Labor life appraisal provide input, it is described it is to be analyzed post-processing bracket it is described first excitation point multichannel stress distribution with it is described
Power loading spectrum corresponds, and obtains actual stress strain-responsive after linear superposition, accumulates and calculates finally by linear damage, obtains
Post-process the fatigue life of bracket.
Further, above-mentioned fatigue analysis method, by building the Coupled Rigid-flexible virtual test platform, reproduction post-processing
System vibration endurance test process is extracted the loading spectrum of post-processing bracket first excitation point, is inputted as Fatigue Assessment, in Hou Chu
During managing support Design, accurate loading spectrum input, the fatigue life of accurate pre- after logging process bracket, to rear are provided
It handles bracket optimization design and accurate reference is provided, realize lightweight, and can be shortened the R&D cycle.
Based on a kind of fatigue analysis method of above-mentioned After-treatment technics bracket, in the embodiment of the present invention, additionally provide
A kind of analysis of fatigue device of After-treatment technics bracket, the structural block diagram of the analytical equipment are as shown in Figure 4, comprising:
First building module 201, second constructs module 202, acquisition conversion module 203, emulation acquisition module 204 and fatigue
Analysis module 205.
Wherein,
The first building module 201, for constructing the finite element model of post-processing bracket to be analyzed；
The second building module 202, for constructing the elastomeric model of the post-processing bracket to be analyzed, according to described in
Elastomeric model constructs Coupled Rigid-flexible virtual test platform；
The acceleration signal is converted to movement device for acquiring acceleration signal by the acquisition conversion module 203
Displacement signal；
The emulation obtains module 204, virtually tries for the movement device displacement signal to be passed to the Coupled Rigid-flexible
It tests platform to be emulated, obtains the power loading spectrum of the Coupled Rigid-flexible virtual test platform；
The analysis of fatigue module 205, for carrying out analysis of fatigue according to the power loading spectrum.
The invention discloses a kind of analysis of fatigue side's devices of After-treatment technics bracket, comprising: place after building is to be analyzed
Manage the finite element model of bracket；The elastomeric model for constructing the post-processing bracket to be analyzed, according to the elastomeric model structure
Build Coupled Rigid-flexible virtual test platform；Acceleration signal is acquired, the acceleration signal is converted to the displacement signal of movement device；It will
The movement device displacement signal passes to the Coupled Rigid-flexible virtual test platform and is emulated, and obtains the Coupled Rigid-flexible and virtually tries
Test the power loading spectrum of platform；Analysis of fatigue is carried out according to the power loading spectrum.Above-mentioned apparatus, by constructing post-processing bracket to be analyzed
Elastomeric model, and according to elastomeric model building Coupled Rigid-flexible virtual test platform emulated, obtain Coupled Rigid-flexible it is virtual
The power loading spectrum of testing stand carries out analysis of fatigue according to the power loading spectrum, and power loading spectrum is more compared to experience load accuracy rate
Height, therefore, analysis of fatigue result accuracy rate can also improve.
In the embodiment of the present invention, the analysis module further include: calibration module 206.
Wherein,
The calibration module 206 is used for when the Coupled Rigid-flexible virtual test platform constructs completion, to the Coupled Rigid-flexible
Virtual test platform is calibrated.
It is empty according to elastomeric model building Coupled Rigid-flexible in the second building module 202 in the embodiment of the present invention
Quasi- testing stand includes: construction unit 207.
Wherein,
The construction unit 207, for constructing and the matched vertical movement device 1 of the elastomeric model, longitudinal action device
2, crosswise movement device 3, testing stand 4, lower bracket 5, upper bracket 6, connecting rod 7, upper bushing 8, lower bushing 9 and post-processing assembly 10,
Wherein, the lower bracket 5, the upper bracket 6 and the connecting rod 7 form the elastomeric model；
Wherein:
The lower bracket 5 is used with the testing stand 4 and is fixedly connected；
The lower bracket 5 and the connecting rod 7 are connected by the upper bushing 8；
The upper bracket 6 and the connecting rod 7 are connected by the lower bushing 9；
The post-processing assembly 10 is used with the upper bracket 6 and is fixedly connected.
In the embodiment of the present invention, the emulation obtains the power load that the Coupled Rigid-flexible virtual test platform is obtained in module 204
Lotus is composed
First acquisition unit 208 and second acquisition unit 209.
Wherein,
The first acquisition unit 208, for obtaining pre-set first excitation point in the finite element model；
The second acquisition unit 209, for motivating point in the Coupled Rigid-flexible virtual test platform according to described first
Obtain the power loading spectrum of the second excitation point, wherein the first excitation point is identical as the quantity of the second excitation point and exists
First excitation point of corresponding relationship is identical with the position and direction of the second excitation point.
In the embodiment of the present invention, the analysis of fatigue module 205 includes:
Third acquiring unit 210, linear superposition unit 211 and damage measurement unit 212.
Wherein,
The third acquiring unit 210, for obtaining the S/N life curve of respective material and in the first excitation point
Specific loading stress distribution；
The linear superposition unit 211, for linearly being folded corresponding specific loading stress distribution and power loading spectrum
Add, obtains stress strain response；
The damage measurement unit 212, it is linear for being carried out according to the stress strain response and the S/N life curve
Damage accumulation operation obtains fatigue damage and the service life of the post-processing bracket to be analyzed.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight
Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.
For device class embodiment, since it is basically similar to the method embodiment, so being described relatively simple, related place ginseng
See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each unit can be realized in the same or multiple software and or hardware when invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
It realizes by means of software and necessary general hardware platform.Based on this understanding, technical solution of the present invention essence
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes the certain of each embodiment or embodiment of the invention
Method described in part.
The fatigue analysis method and device of a kind of After-treatment technics bracket provided by the present invention have been carried out in detail above
Thin to introduce, used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of fatigue analysis method of After-treatment technics bracket characterized by comprising
Construct the finite element model of post-processing bracket to be analyzed；
The elastomeric model for constructing the post-processing bracket to be analyzed, is virtually tried according to elastomeric model building Coupled Rigid-flexible
Test platform；
Acceleration signal is acquired, the acceleration signal is converted to the displacement signal of movement device；
The movement device displacement signal is passed to the Coupled Rigid-flexible virtual test platform to emulate, obtains the Coupled Rigid-flexible
The power loading spectrum of virtual test platform；
Analysis of fatigue is carried out according to the power loading spectrum.
2. the method according to claim 1, wherein further include:
When the Coupled Rigid-flexible virtual test platform, which constructs, to be completed, the Coupled Rigid-flexible virtual test platform is calibrated.
3. the method according to claim 1, wherein virtually being tried according to elastomeric model building Coupled Rigid-flexible
Testing platform includes:
Building with the matched vertical movement device 1 of the elastomeric model, longitudinal action device 2, crosswise movement device 3, testing stand 4, under
Bracket 5, upper bracket 6, connecting rod 7, upper bushing 8, lower bushing 9 and post-processing assembly 10, wherein the lower bracket 5, the upper branch
Frame 6 and the connecting rod 7 form the elastomeric model,
Wherein:
The lower bracket 5 is used with the testing stand 4 and is fixedly connected；
The lower bracket 5 and the connecting rod 7 are connected by the upper bushing 8；
The upper bracket 6 and the connecting rod 7 are connected by the lower bushing 9；
The post-processing assembly 10 is used with the upper bracket 6 and is fixedly connected.
4. the method according to claim 1, wherein obtaining the power loading spectrum of the Coupled Rigid-flexible virtual test platform
Include:
Obtain pre-set first excitation point in the finite element model；
The power loading spectrum of the second excitation point is obtained in the Coupled Rigid-flexible virtual test platform according to the first excitation point,
In, the first excitation point is identical as the quantity of the second excitation point and there are the first excitation points of corresponding relationship and second to swash
The position and direction encouraged a little are identical.
5. according to the method described in claim 4, it is characterized in that, including: according to power loading spectrum progress analysis of fatigue
Obtain the S/N life curve of respective material and the specific loading stress distribution in the first excitation point；
Corresponding specific loading stress distribution and power loading spectrum are subjected to linear superposition, obtain stress strain response；
Linear damage is carried out according to the stress strain response and the S/N life curve and accumulates operation, is obtained described to be analyzed
Post-process fatigue damage and the service life of bracket.
6. a kind of analysis of fatigue device of After-treatment technics bracket characterized by comprising
First building module, for constructing the finite element model of post-processing bracket to be analyzed；
Second building module, for constructing the elastomeric model of the post-processing bracket to be analyzed, according to the elastomeric model
Construct Coupled Rigid-flexible virtual test platform；
Conversion module is acquired, for acquiring acceleration signal, the acceleration signal is converted to the displacement signal of movement device；
Emulation obtains module, imitates for the movement device displacement signal to be passed to the Coupled Rigid-flexible virtual test platform
Very, the power loading spectrum of the Coupled Rigid-flexible virtual test platform is obtained；
Analysis of fatigue module, for carrying out analysis of fatigue according to the power loading spectrum.
7. device according to claim 6, which is characterized in that further include:
Calibration module is used for when the Coupled Rigid-flexible virtual test platform constructs completion, to the Coupled Rigid-flexible virtual test platform
It is calibrated.
8. device according to claim 6, which is characterized in that according to the elastomeric model in the second building module
Constructing Coupled Rigid-flexible virtual test platform includes:
Construction unit, for constructing and the matched vertical movement device 1 of the elastomeric model, longitudinal action device 2, crosswise movement device
3, testing stand 4, lower bracket 5, upper bracket 6, connecting rod 7, upper bushing 8, lower bushing 9 and post-processing assembly 10, wherein the lower branch
Frame 5, the upper bracket 6 and the connecting rod 7 form the elastomeric model,
Wherein:
The lower bracket 5 is used with the testing stand 4 and is fixedly connected；
The lower bracket 5 and the connecting rod 7 are connected by the upper bushing 8；
The upper bracket 6 and the connecting rod 7 are connected by the lower bushing 9；
The post-processing assembly 10 is used with the upper bracket 6 and is fixedly connected.
9. device according to claim 7, which is characterized in that the emulation, which obtains, obtains the Coupled Rigid-flexible void in module
The power loading spectrum of quasi- testing stand includes:
First acquisition unit, for obtaining pre-set first excitation point in the finite element model；
Second acquisition unit, for obtaining the second excitation in the Coupled Rigid-flexible virtual test platform according to the first excitation point
The power loading spectrum of point, wherein the first excitation point is identical as the quantity of second excitation and there are corresponding relationship the
Excitation point is identical with the position and direction of the second excitation point.
10. device according to claim 9, which is characterized in that the analysis of fatigue module includes:
Third acquiring unit, for obtaining the S/N life curve of respective material and being answered in the specific loading of the first excitation point
Power distribution；
Linear superposition unit obtains stress for corresponding specific loading stress distribution and power loading spectrum to be carried out linear superposition
Strain-responsive；
Damage measurement unit, for carrying out linear damage accumulation fortune according to the stress strain response and the S/N life curve
It calculates, obtains fatigue damage and the service life of the post-processing bracket to be analyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589617.4A CN110287633B (en) | 2019-06-29 | 2019-06-29 | Fatigue analysis method and device for engine aftertreatment bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589617.4A CN110287633B (en) | 2019-06-29 | 2019-06-29 | Fatigue analysis method and device for engine aftertreatment bracket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110287633A true CN110287633A (en) | 2019-09-27 |
| CN110287633B CN110287633B (en) | 2023-07-18 |
Family
ID=68021804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910589617.4A Active CN110287633B (en) | 2019-06-29 | 2019-06-29 | Fatigue analysis method and device for engine aftertreatment bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110287633B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111241724A (en) * | 2019-12-26 | 2020-06-05 | 三一重型装备有限公司 | Fatigue life prediction method for wide-body mining vehicle frame |
| CN112182777A (en) * | 2020-10-27 | 2021-01-05 | 中国运载火箭技术研究院 | Method, system, terminal and medium for analyzing dynamic characteristics of instrument support |
| CN113673033A (en) * | 2021-08-23 | 2021-11-19 | 一汽解放大连柴油机有限公司 | Optimal design method for diesel engine external accessory bracket |
| CN113722943A (en) * | 2021-07-15 | 2021-11-30 | 桂林电子科技大学 | Fatigue durability analysis method for engine hood of long-head truck |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393079A (en) * | 2008-11-06 | 2009-03-25 | 上海交通大学 | Automobile vehicle body structure fatigue life predicting system |
| JP2010091463A (en) * | 2008-10-09 | 2010-04-22 | Toyota Motor Corp | Analysis condition determination device |
| CN106996875A (en) * | 2017-06-02 | 2017-08-01 | 广西科技大学 | A kind of vehicle cab transmission function acquisition methods |
| CN107622160A (en) * | 2017-09-19 | 2018-01-23 | 上海航天精密机械研究所 | Excitation vibrating numerical analogy method based on reverse temperature intensity |
| CN109783961A (en) * | 2019-01-23 | 2019-05-21 | 北斗航天汽车（北京）有限公司 | A kind of analog detecting method and simulated testing system of the automobile frame fatigue life based on CAE |
-
2019
- 2019-06-29 CN CN201910589617.4A patent/CN110287633B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010091463A (en) * | 2008-10-09 | 2010-04-22 | Toyota Motor Corp | Analysis condition determination device |
| CN101393079A (en) * | 2008-11-06 | 2009-03-25 | 上海交通大学 | Automobile vehicle body structure fatigue life predicting system |
| CN106996875A (en) * | 2017-06-02 | 2017-08-01 | 广西科技大学 | A kind of vehicle cab transmission function acquisition methods |
| CN107622160A (en) * | 2017-09-19 | 2018-01-23 | 上海航天精密机械研究所 | Excitation vibrating numerical analogy method based on reverse temperature intensity |
| CN109783961A (en) * | 2019-01-23 | 2019-05-21 | 北斗航天汽车（北京）有限公司 | A kind of analog detecting method and simulated testing system of the automobile frame fatigue life based on CAE |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111241724A (en) * | 2019-12-26 | 2020-06-05 | 三一重型装备有限公司 | Fatigue life prediction method for wide-body mining vehicle frame |
| CN111241724B (en) * | 2019-12-26 | 2023-03-31 | 三一重型装备有限公司 | Fatigue life prediction method for wide-body mining vehicle frame |
| CN112182777A (en) * | 2020-10-27 | 2021-01-05 | 中国运载火箭技术研究院 | Method, system, terminal and medium for analyzing dynamic characteristics of instrument support |
| CN113722943A (en) * | 2021-07-15 | 2021-11-30 | 桂林电子科技大学 | Fatigue durability analysis method for engine hood of long-head truck |
| CN113722943B (en) * | 2021-07-15 | 2023-10-27 | 桂林电子科技大学 | Fatigue durability analysis method for engine cover of long-head truck |
| CN113673033A (en) * | 2021-08-23 | 2021-11-19 | 一汽解放大连柴油机有限公司 | Optimal design method for diesel engine external accessory bracket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110287633B (en) | 2023-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110287633A (en) | A kind of fatigue analysis method and device of After-treatment technics bracket | |
| Militano et al. | Dynamic response of a pile in a multi-layered soil to transient torsional and axial loading | |
| CN104200016B (en) | Multi-control-surface aircraft modal calculation and verification method | |
| EP2107358A1 (en) | Analysis system, analysis method, program and mechanical device | |
| CN111475882A (en) | ABAQUS-based rock mass tunnel concrete structure seismic response numerical simulation analysis method | |
| CN107463727A (en) | Bulk testing method based on vector mode finite element and FPGA | |
| CN106934136A (en) | The Simulation System of Vibration Test and method of a kind of slender type aircraft | |
| CN205785735U (en) | A kind of anti-seismic performance of beam bridge analogue experiment installation | |
| Zhao et al. | Yielding, rigidity, and tensile stress in sheared columns of hexapod granules | |
| Zhou et al. | Finite element explicit dynamics simulation of motion and shedding of jujube fruits under forced vibration | |
| CN109684663A (en) | The appraisal procedure and device, system in lorry body weld fatigue service life | |
| CN109815599A (en) | A kind of automatic training method of discrete element material | |
| CN107202701A (en) | The test method of lorry body accelerated fatigue test | |
| CN102213646A (en) | Experimental device and experimental method for power substructure of bracket pipe frame of pipe-laying ship | |
| Baudet et al. | Integrating tensile parameters in 3D mass-spring system | |
| CN107967387A (en) | A kind of Finite Element Design of automobile flexural pivot work torque | |
| WO2020246247A1 (en) | Parameter determination device, parameter determination method, and parameter determination program | |
| Nasser | Seismic response of R/C frames considering dynamic soil-structure interaction | |
| Beatriz et al. | Electrostatically actuated MEMS circular plate resonators: frequency response of superharmonic resonance of third order | |
| Aktas et al. | Computer-Aided Mold Design Algorithm for Precast Concrete Elements. | |
| JP6887821B2 (en) | Modeling method and vibration response analyzer | |
| CN111581707A (en) | Saturated field free field equivalent load determination method | |
| CN111241725A (en) | Structure response reconstruction method for generating countermeasure network based on conditions | |
| Sutisna et al. | Finite Element Simulation of Acceleration Pedal On XX Vehicle | |
| CN114491825B (en) | Automobile fender vibration intensity analysis method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |