CN113779692B - Multi-software linkage simulation system and method for rigid-elastic vehicle track coupling - Google Patents
Multi-software linkage simulation system and method for rigid-elastic vehicle track coupling Download PDFInfo
- Publication number
- CN113779692B CN113779692B CN202110929152.XA CN202110929152A CN113779692B CN 113779692 B CN113779692 B CN 113779692B CN 202110929152 A CN202110929152 A CN 202110929152A CN 113779692 B CN113779692 B CN 113779692B
- Authority
- CN
- China
- Prior art keywords
- finite element
- track
- level language
- vehicle
- element software
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 65
- 230000008878 coupling Effects 0.000 title claims abstract description 41
- 238000010168 coupling process Methods 0.000 title claims abstract description 41
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 41
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 238000004364 calculation method Methods 0.000 claims abstract description 39
- 230000004048 modification Effects 0.000 claims abstract description 7
- 238000012986 modification Methods 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 34
- 230000004044 response Effects 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000004458 analytical method Methods 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 230000001052 transient effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000007667 floating Methods 0.000 description 16
- 230000001133 acceleration Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000682719 Adina Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft 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
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
-
- 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)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Evolutionary Computation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Automation & Control Theory (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention provides a rigid-elastic vehicle track coupling multi-software linkage simulation system and a method, wherein the system comprises the following steps: a computer high-level language program, a finite element software program and a status register; the computer high-level language program is used for writing a main program, establishing a rigid body vehicle system and calculating wheel track force; the finite element software program is used for modeling the elastic track structure system; the state register is used for controlling the linkage of the computer high-level language and the finite element software program so as to realize the coupling power calculation between the rigid body and the elastic body, the state register adopts a TXT format document, the computer high-level language program and the finite element software program are adopted for reading and modifying the content of the state register, and each piece of linked software determines to operate or wait to operate by reading the modified content of the state register. The method is convenient for realizing linkage real-time alternate operation of different software, and the modification and reading of the status register are quick.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a multi-software linkage simulation method of a rigid-elastic vehicle rail coupling system.
Background
With the vigorous development of urban construction in China, 40 urban construction in China has opened urban rail transit by 2019, and the total mileage reaches 6730.27 km. In the construction and operation of urban rail transit, various problems of safety, comfort, environmental influence and the like need to be solved, at the moment, the traditional method for respectively researching vehicles and rails is difficult to be qualified, and a vehicle-rail-environment structure coupling analysis method needs to be adopted for power research. How to calculate the dynamic response of a vehicle-track-environment structure coupling system quickly and accurately becomes a key problem.
At present, two common time domain implementation methods for vehicle-track coupling simulation are mainly adopted:
The first is a finite element software modeling method: the method is used for carrying out finite element integral modeling on a vehicle-track-environment structure, wherein the vehicle modeling is an elastic suspension system, a steel rail is simulated by a beam unit, a track plate is simulated by a solid unit or a shell unit, and a fastener, a cushion layer and the like are simulated by a spring damping unit. The vehicle-track coupling is realized by arranging the contact unit, the vehicle-track overall modeling is realized, the degree of freedom of the vehicle is more, the wheel track relationship carries out nonlinear calculation through the contact unit, and the calculation efficiency is lower.
The second is a control equation modeling method: the method considers a vehicle model as a multi-degree-of-freedom system and gives the multi-degree-of-freedom system by a control equation; simplifying the orbit model into a beam (steel rail) model and a plate (orbit plate) model, giving by adopting a control equation, and solving the orbit dynamic response by using a modal superposition method. The method is suitable for the condition of simple rule of the orbit model; the track form is complex and additional components exist, and the model is given by a control equation, so that the model is often required to be simplified, and the dynamic characteristics of the simplified model and the actual model are greatly different; solving the orbit response using the modal superposition method also presents a problem of accuracy. By adopting the method, the vehicle-track model is required to be considered, and particularly the track model meets periodicity, continuity and uneven track parameters as much as possible, so that modeling difficulty is greatly improved. Modeling is difficult if additional track appendages, such as floating plates, lateral stops, etc., are to be added to the existing process, and control equations are to be re-derived, especially if related appendages are not uniformly arranged. In addition, even for the track structure with regular and simple configuration, the simplified beam and plate model still has deviation from the actual structural behavior when a control equation modeling method is adopted, and the calculation accuracy is affected.
Meanwhile, computer high-level languages and finite element software cannot generally realize synchronous alternate computation of the two. For different software, it is necessary to know whether there are problems such as linkage interfaces, functional limitations of interfaces, how to use interfaces, etc., learning cost is high, and speed may be slow.
Therefore, a method that can effectively cope with the problems of low computational efficiency of the finite element modeling method and low computational accuracy of the control equation modeling method is needed.
Disclosure of Invention
The invention provides a multi-software linkage simulation method of a rigid-elastic vehicle track coupling system, which aims to solve the defects in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme.
A rigid-elastic vehicle track coupling multi-software linkage simulation system, comprising: a computer high-level language program, a finite element software program and a status register;
the computer high-level language program is used for programming a main program by adopting a computer high-level language, establishing a rigid body vehicle system and calculating wheel track force;
the finite element software program is used for modeling the elastic track structure system by adopting finite element software;
The state register is used for controlling the linkage of a computer high-level language program and a finite element software program to realize the coupling power calculation between the rigid body and the elastic body, the state register adopts a TXT format document, the computer high-level language program and the finite element software program read and modify the content of the state register, and each piece of linked software determines to operate or wait to operate by reading the modified content of the state register.
Preferably, the computer high-level language program includes: the system comprises a main control module, a vehicle model module and a wheel track coupling module;
The main control module is used for writing a main program by adopting a high-level language of a computer and reading and modifying the content of the state register;
The vehicle model module is used for establishing a rigid body vehicle system by adopting a computer high-level language;
The wheel-rail coupling module is used for calculating wheel-rail force coupling between a vehicle system and a rail system by adopting a computer high-level language according to the Hertz contact theory and the Kalker linear vermicular sliding force model.
Preferably, the finite element software program comprises: the track model module and the power calculation module;
the track model module is used for modeling the elastic track structure system by adopting finite element software;
The dynamic calculation module is used for calculating modeling of the elastic track structure system by adopting finite element software and reading and modifying the content of the state register.
Preferably, the main control module comprises a parameter input sub-module, a computer high-level language read-write data sub-program and a computer high-level language linkage command sub-module;
The vehicle model module includes a vehicle model control equation generation subroutine;
The wheel-rail coupling module comprises a track irregularity sample generation subprogram, a wheel-rail force calculation subprogram, a node force conversion subprogram and a contact point displacement conversion subprogram;
The parameter input submodule is used for realizing parameter input and parameterization modification of the vehicle model module, the track model module and the track irregularity sample generation subroutine;
the computer high-level language read-write data subprogram is used for reading or modifying the content of the status register;
the computer high-level language linkage command submodule is used for determining to run or wait to run according to the content of the status register read by the computer high-level language read-write data subroutine;
the vehicle model control equation generation subroutine is used for generating a vehicle model in the form of a control equation;
The track irregularity sample generation subroutine is used for generating a track irregularity sample by adopting an inverse Fourier transform method;
The wheel-rail force calculation subroutine is used for calculating wheel-rail force according to displacement conversion from the rail unit node to the contact point, vehicle response and track irregularity of the contact point displacement conversion subroutine; and concentrating force in the steel rail unit by adopting a node force conversion subroutine to convert the node force for applying the wheel rail force to the rail system.
Preferably, the orbit model module comprises an orbit system finite element model generation subroutine; the power calculation module includes: a finite element software transient analysis subprogram, a finite element software read-write data subprogram and a finite element software linkage command subprogram;
The track system finite element model generation subprogram is used for obtaining relevant parameters from the computer high-level language main control module and carrying out three-dimensional modeling according to finite element software;
the finite element software transient analysis subroutine is used for load application and dynamic response solving of a finite element model and comprises a FULL method and a modal superposition method;
The finite element software read-write data subroutine is used for reading or modifying the content of the status register;
And the finite element software linkage command submodule is used for determining operation or waiting operation according to the content of the status register read by the finite element software read-write data subroutine.
Preferably, the vehicle model is a 10-degree-of-freedom vertical vehicle model or a 35-degree-of-freedom vehicle model, and specifically includes: the freedom degrees of the carriage, the two bogies and the four wheels are achieved, the carriage is connected with the bogies through the secondary suspension, and the bogies are connected with the wheels through the primary suspension.
Preferably, the wheel-rail force calculation subroutine calculates the wheel-rail force by integrating the vehicle model displacement response obtained by a computer high-level language program and solving the track system contact point displacement and the track irregularity sample value together.
Another aspect of the invention provides a method for simulating coupled multi-software linkage of a rigid-elastic vehicle track, comprising the following steps:
programming a main program by adopting a computer high-level language, establishing a rigid body vehicle system and calculating wheel track force;
Adopting finite element software to realize modeling of an elastic track structure system;
The method comprises the steps of realizing computer high-level language and finite element software by adopting a state register to finish coupling calculation between a rigid body and an elastic body, wherein the state register adopts a TXT format document, reading and modifying the content of the state register by adopting the computer high-level language and the finite element software, and determining to run or wait to run by reading the modified state register by the linked software.
Preferably, the method specifically comprises the following steps:
Writing a main program by adopting a high-level language of a computer, and reading and modifying the content of a state register;
Adopting a computer high-level language to establish a rigid body vehicle system;
Generating a track irregularity sample by adopting an inverse Fourier transform method; according to conversion displacement from a steel rail unit node to a contact point, vehicle response and track irregularity, adopting a Hertz contact theory and a Kalker linear vermicular sliding force model, and adopting a computer high-level language to realize calculation of wheel-rail force coupling between a vehicle system and a track system;
modeling an elastic track structure system by adopting finite element software;
The finite element software is used for calculating the elastic track structure system and reading and modifying the content of the state register.
The technical scheme provided by the multi-software linkage simulation method of the rigid-elastic vehicle track coupling system provided by the invention can be seen that the simulation method provided by the invention has the following advantages:
1) In the method, a vehicle system is simplified into a rigid body system, a control equation is used for giving and utilizing computer high-level language modeling, a wheel track relationship is calculated by utilizing computer high-level language, and a track model is modeled by adopting finite elements; the vehicle body part utilizes the computer high-level language to directly integrate and solve, so that the speed is high; the wheel-track relation is directly calculated by using a computer high-level language, so that the problem of solving the wheel-track nonlinear contact problem in finite element software is avoided, and the calculation difficulty brought by a finite element integral modeling method can be reduced.
2) The method adopts a finite element method to carry out refined modeling on the track and the auxiliary structure thereof, is closer to the characteristics of the real track, and can obtain more accurate dynamic response of any position of the track.
3) The method adopts the finite element method to carry out track modeling, is suitable for any track structure, and can conveniently add track additional components with various forms and complex arrangement forms.
4) The method can conveniently realize linkage operation of different software through the multi-software linkage state register, and the state register is fast to modify and read, so that the problems of high use difficulty and low efficiency of the existing multi-software linkage interface are solved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a rigid-flexible vehicle track coupling multi-software linkage simulation system according to a first embodiment;
FIG. 2 is a flow chart of a coupled multi-software linkage simulation method for a rigid-elastic vehicle track according to a second embodiment;
FIG. 3 is a graph showing the response time course of the floating plate acceleration at the center node of the upper surface of the floating plate according to the third embodiment;
FIG. 4 is a graph showing the floating plate displacement response time course of the center node of the upper surface of the floating plate according to the third embodiment;
FIG. 5 is a graph showing the response time course of rail displacement at the fourth fastener after floating slab in accordance with the third embodiment;
FIG. 6 is a graph of truck acceleration response time course for the first pre-carriage truck of the third embodiment;
FIG. 7 is a plot of the response time course of the fastener reaction force at the fourth fastener after floating the panel according to the third embodiment;
FIG. 8 is a graph of wheel-rail force response time course for a first wheel set of a first car of the third embodiment;
FIG. 9 is a graph of wheel set displacement response time course for a first wheel set of a first car of the third embodiment;
fig. 10 is a graph showing the vehicle body acceleration response time course of the first compartment of the third embodiment.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the purpose of facilitating an understanding of the embodiments of the invention, reference will now be made to the drawings of several specific embodiments illustrated in the drawings and in no way should be taken to limit the embodiments of the invention.
Example 1
Fig. 1 is a schematic structural diagram of a rigid-elastic vehicle track coupling multi-software linkage simulation system according to the present embodiment, and referring to fig. 1, the system includes: a computer high-level language program 100, a finite element software program 300, and a status register 200.
Wherein, the computer high-level language program 100 is written and operated by MatlabScript, and the finite element software program 300 is written and operated by APDL of Ansys.
The computer high-level language program 100 is used for programming a main program, establishing a rigid body vehicle system and calculating wheel track force by adopting a computer high-level language; the finite element software program 300 is used for modeling the elastic track structure system by adopting finite element software; the status register 200 is used for programming in a high-level language of a computer and controlling the linkage of the finite element software program (alternatively running) so as to realize the coupling power calculation between the rigid body and the elastomer, the status register 200 adopts a TXT format document, the computer high-level language program 100 and the finite element software program 300 read and modify the content of the status register 200, and each piece of linked software determines to run or wait to run by reading the modified content of the status register 200 of the computer high-level language program 100 and the finite element software program 300.
The computer high-level language program 100 includes: a master control module 110, a vehicle model module 120, and a wheel track coupling module 130.
The main control module 110 is used for writing a main program and reading and modifying the content of a status register by adopting a high-level language of a computer; the vehicle model module 120 is used for realizing the establishment of a rigid body vehicle system by adopting a high-level language of a computer; the wheel-rail coupling module 130 is configured to implement calculation of wheel-rail forces between the vehicle system and the rail system using a computer-based high-level language based on the Hertz contact theory and the Kalker linear creep force model.
The main control module 110 includes a parameter input sub-module 111, a computer high-level language read-write data sub-program 112, and a computer high-level language linkage command sub-module 113.
The parameter input sub-module 111 is used for implementing parameter input and parameterization modification of the vehicle model module 120, the track model module 310 and the track irregularity sample generation sub-program 131; the computer high-level language read-write data subroutine 112 is used for reading or modifying the contents of the progress status register 200; the computer high-level language linkage command submodule 113 is used for determining to run or wait to run according to the content command of the status register 200 read by the computer high-level language read-write data subroutine 112.
The vehicle model module 120 includes a vehicle model control equation generation subroutine 121 for generating a vehicle model in the form of a control equation.
The wheel-rail coupling module 130 includes a track irregularity sample generation subroutine 131, a wheel-rail force calculation subroutine 132, a node force scaling subroutine 133, and a contact point displacement scaling subroutine 134.
The track irregularity sample generation subroutine 131 is configured to generate a track irregularity sample by using an inverse fourier transform method, and is capable of customizing a wavelength range, a time domain sample length, a time domain sample time interval, a track irregularity level, and a power spectral density verification of the track irregularity time domain sample; the wheel-rail force calculation subroutine 132 is used for calculating wheel-rail force according to displacement from the rail unit node to the contact point, vehicle response and track irregularity of the contact point displacement conversion subroutine 134; the node force conversion subroutine 133 performs the conversion of concentrated force to node force within the wheeltrack force rail cell for application of track loads.
The node displacement extracted by finite element software is converted into contact point displacement through a contact point displacement conversion subroutine 134, and relates to a steel rail unit shape function; wheel rail force is applied to the nodes of the finite element steel rail unit, and is converted to the nodes at the two ends of the steel rail unit where the wheel-steel rail contact point is located by utilizing a node force conversion subroutine 133, so that static load equivalence is involved.
The finite element software program 300 includes: a trajectory model module 310 and a power calculation module 320.
The orbit model module 310 is used for modeling the elastic orbit structure system by adopting finite element software; the dynamics calculation module 320 is used to use finite element software to perform calculations modeling the elastic track structure system and to read and modify the contents of the status registers.
The orbit model module 310 includes an orbit system finite element model generation subroutine 311; the power calculation module 320 includes: the finite element software transient analysis subroutine 321, the finite element software read-write data subroutine 322, and the finite element software linkage command submodule 323.
The track system finite element model generation subroutine 311 is used for obtaining relevant parameters from the computer high-level language main control module and carrying out three-dimensional modeling according to finite element software; the finite element software transient analysis subroutine 321 is used for load application and dynamic response solving of the finite element model; the finite element software read/write data subroutine 322 is used for reading or modifying the contents of the progress status register; the finite element software linkage command submodule 323 is used for determining to run or waiting to run according to the content of the status register read by the finite element software read-write data subroutine and command linkage of each piece of software. The orbit and the auxiliary structure thereof are modeled in three dimensions in finite element software, and the model precision is high; for a small-scale model, solving by using a Full method, so that the solving precision is high; for a large-scale model, the 'mode superposition method' is used for solving, so that the solving speed is high and the precision is high. Accordingly, accuracy is improved compared to the control equation modeling method.
The track system finite element model generating subprogram 311 obtains relevant parameters from the main control module 110 of the computer high-level language program 100 by utilizing the finite element software read-write data subprogram 322, so as to realize modeling of the track model module 310, such as the length of a steel rail, the spacing of fasteners, whether floating plates are considered, whether shear hinges among the floating plates are considered, the relevant parameters of the floating plates, the material properties of each part, the dynamic parameters of each part and the like, and can realize parameterization modification and automatic modeling; the power calculation module 320 uses the finite element software read-write data subroutine 322 to read the simulated total length, the simulated vehicle pitch number, the simulated vehicle length direction geometric parameters, and the simulated time step, and can implement parameterized modification of the finite element software power calculation.
The vehicle model is a 10-degree-of-freedom vertical vehicle model or a 35-degree-of-freedom vehicle model, and specifically comprises: the freedom degrees of the carriage, the two bogies and the four wheels are achieved, the carriage is connected with the bogies through the secondary suspension, and the bogies are connected with the wheels through the primary suspension. The wheels and the rails are coupled through Hertz nonlinear contact, a Kalker linear creep force model and the like.
The vehicle model of the embodiment is solved by a novel display integration method, and the orbit model is solved by adopting a Newmark-beta method implicit integration method.
The wheel-rail force calculation subroutine 132 calculates the "wheel-rail contact point elastic compression amount" required for the wheel-rail force calculation by integrating the vehicle model displacement response obtained by the computer high-level language program (100) and calculating the track system contact point displacement and the track irregularity sample generated by the track irregularity sample generation subroutine 131 together by the finite element software program (300).
Example two
The embodiment provides a rigid-elastic vehicle track coupling multi-software linkage simulation method, and referring to fig. 2, the method comprises the following steps:
s1, programming a main program by adopting a computer high-level language, establishing a rigid body vehicle system and calculating wheel track force.
S11, writing the main program by adopting a high-level language of a computer, and reading and modifying the content of the state register.
S12, establishing a rigid body vehicle system by adopting a computer high-level language.
S13, generating a track irregularity sample by adopting an inverse Fourier transform method; according to conversion displacement from the steel rail unit node to the contact point, vehicle response and track irregularity, a Hertz contact theory and a Kalker linear creep force model are applied, and a computer high-level language is adopted to realize calculation of wheel-rail force coupling between a vehicle system and a track system.
S2, modeling the elastic track structure system by adopting finite element software.
S21, modeling an elastic track structure system by adopting finite element software, such as: the track plate adopts a solid unit or a shell unit, the steel rail adopts a beam unit, and the fastener adopts a spring damping unit. The two ends of the fastener unit are respectively coupled with the degrees of freedom of the steel rail nodes and the rail plate nodes in a joint mode. The remaining required structures are referenced to the usual modeling methods.
S22, calculating modeling of the elastic track structure system by adopting finite element software, and reading and modifying the content of the state register.
S3, coupling between the rigid body and the elastic body is achieved by adopting a state register, the state register adopts a TXT format document, the content of the state register is read and modified by adopting a computer high-level language and finite element software, and each piece of linked software determines to operate or wait to operate by reading the modified state register. The control right is issued by modifying the status register and the software running thereafter is decided.
Fig. 2 is a flow chart of a rigid-elastic vehicle track coupling multi-software linkage simulation method according to the embodiment. Referring to fig. 2, the specific flow is as follows:
1) Inputting relevant parameters of a vehicle and a track, and generating a control equation of the vehicle; writing the track parameters into the TXT text by using a high-level language of a computer; simultaneously generating a track irregularity sample or reading an existing sample; reading the track parameter TXT text data by utilizing finite element software, and establishing a finite element model;
2) Calculating wheel track force (initial step is static load), substituting the wheel track force into a vehicle equation as load, calculating the displacement and the speed of a vehicle body at the next step by using a novel display integration method, converting the static load into the load of a rail node of a finite element software track model, writing a load TXT text, after the finite element software reads load data, calculating the response of the track, and writing the displacement of the nodes at the two ends of the rail unit where the vehicle is positioned at the next step into the displacement TXT text;
3) And reading steel rail node displacement data of a displacement TXT text, converting the displacement of a wheel rail contact point, integrating the obtained vehicle displacement by using a 'Zha method', combining the irregularity of the time node track, and calculating a new wheel rail force based on Hertz nonlinear contact and Kalker linear vermicular sliding force models.
4) And (3) applying the wheel-rail force as a new load to the vehicle and the rail structure, and repeating the steps 2 and 3 to perform a new cycle.
In summary, by adopting the overall flow of the computer high-level language main control, the automatic high-speed alternate running of the computer high-level language program and the finite element software program is realized based on the setting of the status register. The parameterized design is adopted, the parameterized modification of each part of the model in the parameter input module is realized, the speed of modifying the model is greatly improved, and the repetitive work is avoided. The coupling calculation technology of the rigid body vehicle control equation-elastic orbit structure finite element model is adopted to realize wheel-orbit coupling calculation of the vehicle equation and the orbit finite element model, so that the problem of difficult nonlinear solution of the finite element model by adopting a contact unit is avoided, and the model refinement degree is obviously improved compared with the full control equation modeling.
Example III
The embodiment adopts a rigid-elastic vehicle track coupling multi-software linkage simulation system and a method to carry out specific application, and considers that the B2 subway train runs on the floating slab track structure. Tables 1 and 2 show the main parameters of the track structure of the floating slab and the body structure, respectively; in the calculation, 8 sections of trains are grouped, the speed of the train is 80km/h, the floating slab is single, and only the track extends 50m to the front and back of the floating slab. Generating a track irregularity sample according to the U.S. grade 5 track spectrum, and taking the wavelength of 1-30 m.
TABLE 1 parameters of track materials for floating plates
TABLE 2 vehicle parameters
By adopting the model, the system is utilized to carry out modeling simulation to obtain the displacement, speed and acceleration response of each part of the steel rail, the floating plate and the vehicle body, and simultaneously, the wheel rail force time course undergone by each wheel pair in the vehicle marshalling, the support reaction force of the fasteners when the vehicle passes and the like can be obtained, and the results of the embodiment are shown in fig. 3-10, so that the data curves are good in form and reasonable in value interval through the drawings, the safety and comfort of the vehicle operation and the environmental vibration caused by the safety and comfort of the vehicle can be evaluated by utilizing the data, and the feasibility and the practicability of the system and the method are illustrated.
It should be understood by those skilled in the art that the above application types are merely examples, and that other existing or future input box application types may be applicable to the embodiments of the present invention, and are also included within the scope of the present invention and are incorporated herein by reference. The present embodiment is described by taking a software combination of Matlab-Ansys as an example, and the related technology can be implemented by expanding the combination of other similar computer high-level languages (such as VisualBasic, fortran, python, etc) +commercial finite element software (such as Abaqus, comsol Multiphysics, adina, msc, etc.).
The embodiment is illustrated by taking a vehicle-track coupling model as an example, and the related technology can be conveniently expanded and applied to the establishment of a system model of a vehicle-track-site (bridge, tunnel and site soil) -structure, and can also be expanded and applied to other similar engineering problems.
It will be appreciated by those skilled in the art that the number of various elements shown in fig. 1 for simplicity only may be less than in practice, but such omission is certainly not provided for the clear and thorough disclosure of the embodiments of the invention not to be affected.
It should be understood by those skilled in the art that the above-mentioned decision to invoke a policy according to user information is merely a better illustration of the technical solution of the embodiments of the present invention, and is not a limitation of the embodiments of the present invention. Any method for determining a calling policy based on user attributes is included in the scope of the embodiments of the present invention.
From the above description of embodiments, it will be apparent to those skilled in the art that the present invention may be implemented in software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments or some parts of the embodiments of the present invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, with reference to the description of method embodiments in part. The apparatus and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (2)
1. A rigid-flexible vehicle track coupling multi-software linkage simulation system, comprising: a computer high-level language program, a finite element software program and a status register; the computer high-level language program includes: the system comprises a main control module, a vehicle model module and a wheel track coupling module;
The main control module is used for writing a main program by adopting a high-level language of a computer and reading and modifying the content of the state register;
The vehicle model module is used for establishing a rigid body vehicle system by adopting a computer high-level language;
The wheel-rail coupling module is used for calculating wheel-rail force coupling between a vehicle system and a rail system by adopting a computer high-level language according to a Hertz contact theory and a Kalker linear vermicular sliding force model;
The main control module comprises a parameter input sub-module, a computer high-level language read-write data sub-program and a computer high-level language linkage command sub-module;
The vehicle model module includes a vehicle model control equation generation subroutine;
The wheel-rail coupling module comprises a track irregularity sample generation subprogram, a wheel-rail force calculation subprogram, a node force conversion subprogram and a contact point displacement conversion subprogram;
The parameter input submodule is used for realizing parameter input and parameterization modification of the vehicle model module, the track model module and the track irregularity sample generation subroutine;
the computer high-level language read-write data subprogram is used for reading or modifying the content of the status register;
the computer high-level language linkage command submodule is used for determining to run or wait to run according to the content of the status register read by the computer high-level language read-write data subroutine;
the vehicle model control equation generation subroutine is used for generating a vehicle model in the form of a control equation;
The track irregularity sample generation subroutine is used for generating a track irregularity sample by adopting an inverse Fourier transform method;
the wheel-rail force calculation subroutine is used for converting wheel-rail contact point steel rail displacement, vehicle response and track irregularity according to the contact point displacement conversion subroutine and calculating wheel-rail force; concentrating force in a steel rail unit by adopting a node force conversion subroutine to convert the node force for applying wheel rail force to a rail system;
The contact point displacement conversion subroutine is specifically used for converting the displacement from the steel rail unit node to the contact point;
The finite element software program includes: the track model module and the power calculation module;
the track model module is used for modeling the elastic track structure system by adopting finite element software;
The dynamic calculation module is used for calculating modeling of the elastic track structure system by adopting finite element software and reading and modifying the content of the state register;
The orbit model module comprises an orbit system finite element model generation subroutine; the power calculation module includes: a finite element software transient analysis subprogram, a finite element software read-write data subprogram and a finite element software linkage command subprogram;
the track system finite element model generation subprogram is used for obtaining relevant parameters from a computer high-level language main control module and carrying out three-dimensional modeling through finite element software;
the finite element software transient analysis subroutine is used for load application and dynamic response solving of a finite element model and comprises a FULL method and a modal superposition method;
The finite element software read-write data subroutine is used for reading or modifying the content of the status register;
the finite element software linkage command submodule is used for determining operation or waiting operation according to the content of the status register read by the finite element software read-write data subroutine;
The vehicle model is a 10-degree-of-freedom vertical vehicle model or a 35-degree-of-freedom vehicle model, and specifically comprises: the freedom degrees of the carriage, the two bogies and the four wheels are that the carriage is connected with the bogies through a secondary suspension, and the bogies are connected with the wheels through a primary suspension;
the wheel-rail force calculation subprogram calculates the wheel-rail force required elastic compression quantity of the wheel-rail contact point by integrating a computer high-level language program to obtain a vehicle model displacement response, and a finite element software program solves the joint displacement of the rail system contact point and a rail irregularity sample value to jointly calculate;
the computer high-level language program is used for programming a main program by adopting a computer high-level language, establishing a rigid body vehicle system and calculating wheel track force;
the finite element software program is used for modeling the elastic track structure system by adopting finite element software;
The state register is used for controlling the linkage of a computer high-level language program and a finite element software program to realize the coupling power calculation between the rigid body and the elastic body, the state register adopts a TXT format document, the computer high-level language program and the finite element software program read and modify the content of the state register, and each piece of linked software determines to operate or wait to operate by reading the modified content of the state register.
2. A method for simulating coupled multi-software linkage of a rigid-elastic vehicle track, which is characterized by being executed by the coupled multi-software linkage simulation system of the rigid-elastic vehicle track according to claim 1, and comprising the following steps:
programming a main program by adopting a computer high-level language, establishing a rigid body vehicle system and calculating wheel track force;
Adopting finite element software to realize modeling of an elastic track structure system;
The method comprises the steps that a state register is adopted to realize high-level language and finite element software of a computer so as to finish coupling calculation between a rigid body and an elastic body, the state register adopts a TXT format document, the high-level language and finite element software of the computer are adopted to read and modify the content of the state register, and each piece of linked software determines to run or wait to run by reading the modified state register;
The method specifically comprises the following steps:
Writing a main program by adopting a high-level language of a computer, and reading and modifying the content of a state register;
Adopting a computer high-level language to establish a rigid body vehicle system;
Generating a track irregularity sample by adopting an inverse Fourier transform method; according to conversion displacement from a steel rail unit node to a contact point, vehicle response and track irregularity, adopting a Hertz contact theory and a Kalker linear vermicular sliding force model, and adopting a computer high-level language to realize calculation of wheel-rail force coupling between a vehicle system and a track system;
modeling an elastic track structure system by adopting finite element software;
The finite element software is used for calculating the elastic track structure system and reading and modifying the content of the state register.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110929152.XA CN113779692B (en) | 2021-08-13 | 2021-08-13 | Multi-software linkage simulation system and method for rigid-elastic vehicle track coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110929152.XA CN113779692B (en) | 2021-08-13 | 2021-08-13 | Multi-software linkage simulation system and method for rigid-elastic vehicle track coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113779692A CN113779692A (en) | 2021-12-10 |
| CN113779692B true CN113779692B (en) | 2024-06-04 |
Family
ID=78837746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110929152.XA Active CN113779692B (en) | 2021-08-13 | 2021-08-13 | Multi-software linkage simulation system and method for rigid-elastic vehicle track coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113779692B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114996982B (en) * | 2022-08-08 | 2022-10-25 | 西南交通大学 | Real-time simulation system and method of train track model based on cloud computing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699450A (en) * | 2009-10-27 | 2010-04-28 | 北京交通大学 | Seamless turnout structural system on bridge and dynamic analysis method thereof |
| CN103150458A (en) * | 2013-04-01 | 2013-06-12 | 中南大学 | Car-track-bridge-foundation coupling system and dynamic analysis method thereof |
| CN105718629A (en) * | 2016-01-08 | 2016-06-29 | 桂林电子科技大学 | Variant design method of meeting engineering constraint conditions |
| CN107391796A (en) * | 2017-06-20 | 2017-11-24 | 江苏理工学院 | A kind of combined optimization design method based on MATLAB and ANSYS |
| CN110308002A (en) * | 2019-06-21 | 2019-10-08 | 北京交通大学 | A kind of municipal rail train suspension method for diagnosing faults based on ground detection |
| CN111913405A (en) * | 2020-06-23 | 2020-11-10 | 中车工业研究院有限公司 | Multi-software joint simulation system |
| CN116362089A (en) * | 2023-03-28 | 2023-06-30 | 深圳大学 | Vehicle-ballasted track-roadbed space coupling dynamics method, device and equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2439663A1 (en) * | 2010-09-22 | 2012-04-11 | Siemens Aktiengesellschaft | A method, apparatus and computer program product for the finite element analysis of frequency dependent behaviour of nonlinear materials and contacts |
| US11442771B2 (en) * | 2020-01-02 | 2022-09-13 | Arm Limited | Constraints on updating or usage of memory system component resource control parameters |
-
2021
- 2021-08-13 CN CN202110929152.XA patent/CN113779692B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699450A (en) * | 2009-10-27 | 2010-04-28 | 北京交通大学 | Seamless turnout structural system on bridge and dynamic analysis method thereof |
| CN103150458A (en) * | 2013-04-01 | 2013-06-12 | 中南大学 | Car-track-bridge-foundation coupling system and dynamic analysis method thereof |
| CN105718629A (en) * | 2016-01-08 | 2016-06-29 | 桂林电子科技大学 | Variant design method of meeting engineering constraint conditions |
| CN107391796A (en) * | 2017-06-20 | 2017-11-24 | 江苏理工学院 | A kind of combined optimization design method based on MATLAB and ANSYS |
| CN110308002A (en) * | 2019-06-21 | 2019-10-08 | 北京交通大学 | A kind of municipal rail train suspension method for diagnosing faults based on ground detection |
| CN111913405A (en) * | 2020-06-23 | 2020-11-10 | 中车工业研究院有限公司 | Multi-software joint simulation system |
| CN116362089A (en) * | 2023-03-28 | 2023-06-30 | 深圳大学 | Vehicle-ballasted track-roadbed space coupling dynamics method, device and equipment |
Non-Patent Citations (2)
| Title |
|---|
| Dynamics of the coupled railway vehicle-flexible track system with irregularities using a multibody approach with moving modes;Antonio M. Recuero等;《International Journal of Vihecle Mechanics and Mobility》;第52卷(第1期);第45-67页 * |
| 大跨度简支钢桁梁桥车-桥耦合振动影响因素分析;陈敦等;《地震工程学报》;第39卷(第02期);第205-212页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113779692A (en) | 2021-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Eliseev et al. | Theory of oscillations | |
| Zhang et al. | Study on dynamics of coupled systems in high-speed trains | |
| Antunes et al. | A co-simulation approach to the wheel–rail contact with flexible railway track | |
| CN103150458B (en) | Vehicle-track-bridge-foundation coupled system and method for dynamic analysis thereof | |
| Xu et al. | A three-dimensional dynamic model for train-track interactions | |
| Ling et al. | Integration of car-body flexibility into train–track coupling system dynamics analysis | |
| Massat et al. | Pantograph catenary dynamic optimisation based on advanced multibody and finite element co-simulation tools | |
| Xu et al. | Stress and acceleration analysis of coupled vehicle and long-span bridge systems using the mode superposition method | |
| Kong et al. | New strategy of substructure method to model long-span hybrid cable-stayed bridges under vehicle-induced vibration | |
| Zhang et al. | A train-bridge dynamic interaction analysis method and its experimental validation | |
| Dong et al. | Instability phenomenon associated with two typical high speed railway vehicles | |
| Chen et al. | An Alternative Solution of Train‐Track Dynamic Interaction | |
| Li et al. | A numerical approach to the interaction between airflow and a high-speed train subjected to crosswind | |
| Sun et al. | Numerical investigation into the critical speed and frequency of the hunting motion in railway vehicle system | |
| CN113779692B (en) | Multi-software linkage simulation system and method for rigid-elastic vehicle track coupling | |
| Gu | Resonance in long-span railway bridges carrying TGV trains | |
| CN116362089A (en) | Vehicle-ballasted track-roadbed space coupling dynamics method, device and equipment | |
| Chen et al. | A three-dimensional dynamic model for railway vehicle–track interactions | |
| Yu et al. | An efficient approach for stochastic vibration analysis of high-speed maglev vehicle-guideway system | |
| Shi et al. | An efficient non-iterative hybrid method for analyzing train–rail–bridge interaction problems | |
| Ju | A frictional contact finite element for wheel/rail dynamic simulations | |
| Ding et al. | Development of new electromagnetic suspension–based high‐speed Maglev vehicles in China: Historical and recent progress in the field of dynamical simulation | |
| Shao et al. | A novel train–bridge interaction computational framework based on a meshless box girder model | |
| Yang et al. | A novel 3D train–bridge interaction model for monorail system considering nonlinear wheel-track slipping behavior | |
| Zeng et al. | Nonlinear dynamic responses of high-speed railway vehicles under combined self-excitation and forced excitation considering the influence of unsteady aerodynamic loads |
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 |