CN116561893A - Modeling method and related equipment for bow net coupling dynamics model - Google Patents
Modeling method and related equipment for bow net coupling dynamics model Download PDFInfo
- Publication number
- CN116561893A CN116561893A CN202310519706.8A CN202310519706A CN116561893A CN 116561893 A CN116561893 A CN 116561893A CN 202310519706 A CN202310519706 A CN 202310519706A CN 116561893 A CN116561893 A CN 116561893A
- Authority
- CN
- China
- Prior art keywords
- model
- contact line
- hanger
- dynamics model
- point
- 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.)
- Pending
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 112
- 238000010168 coupling process Methods 0.000 title claims abstract description 112
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 19
- 238000004590 computer program Methods 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 5
- 241001125292 Balaena mysticetus Species 0.000 description 8
- 238000013016 damping Methods 0.000 description 8
- 239000003550 marker Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000003993 interaction Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction 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 construction method of an bow net coupling dynamics model and related equipment, wherein the method comprises the following steps: constructing a contact line model and a carrier cable model according to the flexible file; determining a hanger point on the contact line model and the carrier rope model, and establishing a hanger force element between the contact line model and the carrier rope model at the hanger point; constraint is applied to a hanger point, so that a pre-applied load of a contact line model to a hanger force element is obtained; constructing and obtaining a flexible dynamic model according to the contact line model, the carrier cable model, the pre-applied load and the hanger force element; and loading the rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain the bow net coupling dynamics model. The automatic shape finding of the overhead contact system is achieved through the construction of the hanger force elements at the corresponding positions of the flexible contact line and the carrier cable, and the automatic shape finding of the overhead contact system is achieved through the preloading operation, and the model construction is more accurate and real through the flexible overhead contact system with tension, the three-dimensional entity hinged pantograph and the bow net coupling.
Description
Technical Field
The invention relates to the technical field of dynamics simulation of trains, in particular to a method and a device for constructing an arch-net coupling dynamics model, electronic equipment and a storage medium.
Background
The contact net is used as a large-span flexible cable system, belongs to a low-frequency flexible small damping structure and is very sensitive to disturbance. In the running process of the train, the bow net interaction is very intense especially in typical running environments of crosswind running, passing through tunnels, train crossing and the like. In order to ensure safe and stable running of the train, numerical simulation research with high precision and high efficiency is required to be carried out.
In the process of researching the bow net, the bow net can be separately and independently researched, and the coupling research can also be performed. When the bow net coupling research is carried out, the bow net model is generally simplified, for example, a three-mass block model is adopted by a pantograph, and a two-dimensional finite element model is adopted by a catenary. However, when the contact net model is built, the initial state under the action of tension is usually required to be found, so that the contact net model can be built, and the process is complicated. And the pantograph model of the three mass blocks is a simplified model, and the characteristics of the pantograph can not be accurately reflected when the interaction of the pantograph and the net is severe.
Disclosure of Invention
The invention provides a method, a device, electronic equipment and a storage medium for constructing an arch-net coupling dynamics model, which are used for solving the problems of complicated construction process and oversimplification of the arch-net coupling dynamics model in the prior art.
The invention provides a construction method of an arch network coupling dynamics model, which comprises the following steps:
constructing a contact line model and a carrier cable model according to the flexible file;
determining a dropper point on the contact line model and the carrier rope model, and establishing a dropper force element between the contact line model and the carrier rope model at the dropper point;
applying constraint at the hanger point to obtain a pre-applied load of the contact line model to the force element;
constructing and obtaining a flexible dynamics model according to the contact line model, the carrier rope model, the pre-applied load and the hanger force element;
and loading a rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain an arch network coupling dynamics model.
According to the construction method of the bow net coupling dynamics model provided by the invention, a dropper point is determined on the contact line model, and a dropper force element between the contact line and the carrier rope is established at the dropper point, and the construction method comprises the following steps:
determining a spanning starting point and a spanning end point of a spanning on the contact line model, and obtaining a modeling interval according to the spanning starting point and the spanning end point, wherein the modeling interval is obtained based on the adjacent spanning starting point and spanning end point;
determining a hanger starting point in the modeling interval, and determining a hanger end point on the carrier rope model according to the hanger starting point;
and establishing a hanger force element between the contact line and the carrier cable according to the hanger starting point and the hanger ending point.
According to the method for constructing the bow net coupling dynamics model provided by the invention, before constraint is applied to the dropper points to obtain the pre-applied load of the contact line model to the force element, the method further comprises the following steps:
and obtaining initial strain in a flexible file corresponding to the contact line model, applying constraints at two ends of the contact line model, applying constraints at the joint between spans, and applying gravitational acceleration and the initial strain.
According to the construction method of the bow net coupling dynamics model provided by the invention, constraint is applied to the dropper points, so that the pre-applied load of the contact line model to the force element is obtained, and the construction method comprises the following steps:
applying a constraint in a vertical direction at the hanger point of the contact line model;
determining a force to the contact line model at the hanger point based on the constraint and the initial strain, and taking the force as a pre-applied load to the force element at the hanger point.
According to the construction method of the bow net coupling dynamics model provided by the invention, the flexible dynamics model is constructed according to the contact line model, the carrier rope model, the pre-applied load and the hanger force element, and the construction method comprises the following steps:
receiving input force element information of the hanger force element;
obtaining a contact net dynamics model corresponding to the modeling interval according to the contact line model, the carrier rope model, the pre-applied load and the force element information;
and according to the contact net dynamics model, performing area coverage on the contact net formed by the contact line model and the carrier rope model to obtain a flexible dynamics model.
According to the construction method of the bow net coupling dynamics model provided by the invention, the rigid dynamics model is loaded, and the rigid dynamics model and the flexible dynamics model are coupled to obtain the bow net coupling dynamics model, which comprises the following steps:
receiving input pantograph parameters, and obtaining a rigid dynamics model according to the pantograph parameters;
and coupling the rigid dynamics model and the flexible dynamics model to obtain an arch network coupling dynamics model.
The invention provides a construction method of an bow net coupling dynamics model, which comprises the following steps:
and receiving input material data of the contact line and the carrier cable, and generating and obtaining flexible files corresponding to the contact line and the carrier cable respectively according to the material data, wherein the material data at least comprises material performance, three-dimensional beam unit type, cross section and characteristic information.
The invention also provides a device for constructing the bow net coupling dynamics model, which comprises the following steps:
the file acquisition module is used for constructing and obtaining a contact line model and a carrier cable model according to the flexible file;
the force element establishing module is used for determining a hanger point on the contact line model and the carrier rope model and establishing a hanger force element between the contact line model and the carrier rope model at the hanger point;
the constraint setting module is used for applying constraint at the hanger point to obtain a pre-applied load of the contact line model on the hanger force element;
the model construction module is used for constructing and obtaining a flexible dynamics model according to the contact line model, the carrier rope model, the pre-applied load and the hanger force element;
and the model coupling module is used for loading a rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain an arch network coupling dynamics model.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the construction method of the bow net coupling dynamics model according to any one of the above when executing the program.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of constructing a bow net coupling dynamics model as described in any one of the above.
The invention provides a construction method, a device, electronic equipment and a storage medium of a bow net coupling dynamics model, when the bow net coupling dynamics model is constructed, firstly, the flexible dynamics model is constructed, a contact line model and a carrier rope model are obtained according to flexible file construction, then, a hanger force element is established according to a hanger point determined on the contact line model and the carrier rope model, and through applying relevant force element setting, a flexible dynamics model of a contact net formed by the contact line and the carrier rope is obtained, finally, a relevant rigid dynamics model is loaded, and the coupling treatment of the model is carried out, so that the bow net coupling dynamics model is obtained. The method has the advantages that the force elements are built at the corresponding positions of the flexible contact line and the carrier cable rapidly, the contact line is automatically shaped through the preloading operation, and the model is built more accurately and truly through the flexible contact line with tension, the three-dimensional entity hinged pantograph and the bow net coupling.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for constructing an bow net coupling dynamics model provided by the invention;
FIG. 2 is a flow chart illustrating the steps for creating force elements according to the present invention;
FIG. 3 is another flow chart of the steps provided by the present invention for constructing an archwire coupling dynamics model;
fig. 4 is a schematic structural view of a pantograph provided by the present invention;
FIG. 5 is a schematic structural diagram of an bow net coupling dynamics model provided by the invention;
FIG. 6 is a schematic structural diagram of a device for constructing an arch network coupling dynamics model provided by the invention;
fig. 7 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The method for constructing the bow net coupling dynamics model of the present invention is described below with reference to fig. 1 to 5. Referring to fig. 1, fig. 1 is a flow schematic diagram of a method for constructing an bow net coupling dynamics model, where the method includes:
and step 101, constructing a contact line model and a carrier rope model according to the flexible file.
The bow net coupling dynamics model is a model formed by combining a pantograph of a train with a contact net, and the contact net generally comprises a contact line, a carrier rope and a hanger, but in the bow net coupling dynamics model constructed in the method, the automatic shape finding of the contact net is realized by establishing force elements between the flexible contact line with tension and the carrier rope and then carrying out preloading operation.
Specifically, when constructing the bow net coupling dynamics model, firstly, a contact line model and a carrier rope model are established, and related information of the contact line model and the carrier rope model is set according to an input flexible file so as to simulate a real contact line and a carrier rope, and then the contact line model and the carrier rope model are obtained.
For example, for a flexible file for constructing the contact line model and the catenary model, the flexible file is obtained in advance according to input related material information. Wherein, when obtaining the flexible file, include: and receiving input material data of the contact line and the carrier cable, and generating and obtaining flexible files corresponding to the contact line and the carrier cable respectively based on the material data, wherein the material data at least comprises material performance, three-dimensional beam unit type, cross section and characteristic information thereof.
And when the flexible file is obtained, the flexible file can be realized by adopting a finite element method. Taking the flexible file corresponding to the contact line as an example, firstly setting the material property, the three-dimensional beam unit type and the cross section of the contact line according to the real data, and then establishing a contact line model capable of truly reflecting the property of the contact line, and at the moment, after the setting is completed, generating a corresponding CDB format file for storing the data set at the moment.
Then, a main node used for establishing force elements on the contact line is determined, substructure solving is carried out, tension is applied to the contact line, statics solving is carried out, and prestress data obtained through solving is stored in a DB format. And finally, when the stress of the contact line at the moment is obtained according to the applied tension, obtaining a corresponding mode result through solving, and storing the obtained result data in a SUB format. The obtained three formats of files form the flexible file required by the flexible contact line.
In the same way as the contact line, a flexible file required for the flexible treatment of the carrier cable can also be obtained in this way.
After the files needed by the flexible treatment of the contact line and the carrier rope are obtained, a real contact line model and carrier rope model with flexible characteristics can be simulated and established during modeling treatment.
In addition, when the contact line model and the catenary model are obtained according to the flexible file, files with different formats are processed in the multi-body dynamics software, and effective data for establishing the contact line model and the catenary model are obtained through reading data.
And 102, determining a dropper point on the contact line model and the carrier rope model, and establishing a dropper force element between the contact line model and the carrier rope model at the dropper point.
Specifically, a dropper point for establishing a force element is determined on the established contact line model and the carrier rope model, wherein the dropper point comprises a dropper starting point on the contact line model and a dropper ending point on the carrier rope model, and the dropper force element between the contact line model and the carrier rope model is established at the dropper point. Wherein the force element is the interaction force between objects in the multi-body system. At the moment, the contact line model and the carrier cable model are connected by establishing force elements, and the connection relation and interaction between the contact line model and the carrier cable model are simulated.
For example, in reality, corresponding receiving devices or devices are used to support the contact wires and the carrier cables, and a receiving device, such as a pole for fixing the wires, is usually arranged at fixed intervals, so that the wires are laid by equidistant arrangement, and the same applies to the contact wires. Therefore, when the force element between the contact line model and the carrier cable model is established, the force element of the whole contact net can be established by selecting a setting interval, establishing the force element of the interval and then copying and modifying the force element. Referring specifically to fig. 2, fig. 2 is a flowchart illustrating steps of establishing a force element according to the present invention, wherein the steps include steps 201 to 203.
Step 201, determining a spanning starting point and a spanning end point of a spanning on a contact line model, and obtaining a modeling interval according to the spanning starting point and the spanning end point, wherein the modeling interval is obtained based on adjacent spanning starting point and spanning end point;
step 202, determining a hanger starting point in a modeling interval, and determining a hanger end point on a carrier cable model according to the hanger starting point;
and 203, establishing a hanger force element between the contact line and the carrier cable according to the hanger starting point and the hanger ending point.
Specifically, when a force element of an interval section is established, firstly, a modeling interval for establishing the force element is required to be determined, at this time, a span starting point and a span end point of a span are determined on a contact line model, then, the modeling interval is obtained according to the determined span starting point and span end point, and a modeling interval is formed by an adjacent span starting point and span end point, then, a hanger starting point is determined on the modeling interval, a hanger end point corresponding to the hanger starting point is determined on a carrier cable model, and finally, a hanger force element in the modeling interval is established according to the hanger starting point and the hanger end point.
In practical application, the modeling interval described is based on a span, that is, an interval formed by two adjacent bearing devices as described above, and the establishment of the hanger force elements in the whole contact net model can be completed through the establishment of a plurality of hanger force elements of the span.
When determining the span starting point and the span ending point of the span, the span starting point and the span ending point can be determined in real time, for example, a section is selected on the contact line model through real-time operation when modeling is performed, and then a corresponding section can exist on the carrier rope model, and the section can also be contained in a flexible file, for example, the length of the contact line and the carrier rope, the length of each span, the number of main nodes contained in each span and the like are stored in the flexible file, wherein the main nodes can be hanger points for performing force element establishment.
And 103, applying constraint at the dropper point to obtain the pre-applied load of the contact line model to the dropper force element.
Specifically, after the hanger point is determined on the contact line model, the hanger force element acts on the contact line model by applying corresponding constraint at the hanger point, and then the pre-applied load of the contact line model to the force element is determined by the support reaction force.
For the whole contact line model, the contact line model can be divided into three parts, namely a head span, a middle span and a tail span, when the pre-applied load is determined, the pre-applied load of each force element in the three spans is determined, and then the middle span is expanded to obtain the pre-applied load of each dropper force element in each span.
Because of the difference between the leading and trailing spans and the intermediate span, constraint processing of the entire contact line model is required in determining the pre-applied load, including: and obtaining initial strain in a flexible file corresponding to the contact line model, applying constraints at two ends of the contact line model, applying constraints at the joint between the spans, and applying gravitational acceleration and initial strain. After completing the constraints on the start and end points of each span of the contact line model, the corresponding constraints are then applied at the hanger points, while constraints are also applied at both ends of the contact line model for the entire contact line model, to obtain the pre-applied load of the contact line model on the hanger force elements.
And in determining and deriving the pre-applied load of the contact line model to the hanger force element, comprising: at the hanger point of the contact line model, applying a constraint in the vertical direction; and determining the acting force of the contact line model at the dropper point according to the constraint, the gravity and the initial strain, and taking the acting force as the pre-applied load of the dropper force element at the dropper point.
It should be noted that the number of the hanger points (i.e., the main nodes) between each span is several, a corresponding force element needs to be established for each hanger point, and the force elements corresponding to each hanger point are different, which is specifically shown in the set rigidity, damping, pre-applied load, and the like.
And 104, constructing and obtaining a flexible dynamics model according to the contact line model, the carrier cable model, the pre-applied load and the hanger force element.
Specifically, when the bow net coupling dynamics model is constructed, a contact line model, a carrier rope model, a hanger force element and the like are required to be constructed, so that after the hanger force element is built, rigidity and damping corresponding to each hanger force element are also required to be set, and meanwhile, the obtained pre-applied load is given to the hanger force element, and then the corresponding flexible dynamics model is obtained through the construction of the model.
In practice, when the model is constructed, firstly, a model corresponding to the model is built, and then the whole model is constructed through copying, modification and other operations. Thus, in deriving the bownet coupling dynamics model, it includes: receiving force element information of input hanger force elements; obtaining a contact net dynamics model corresponding to the modeling interval according to the contact line model, the catenary model, the pre-applied load and the force element information; and according to the contact net dynamics model, performing area coverage on an arch net formed by the contact line model and the carrier rope model to obtain a flexible dynamics model.
The contact net dynamics model is a part formed by a contact line model and a carrier rope model, and then the pantograph model is coupled into the contact net dynamics model to obtain a pantograph-net coupling dynamics model.
When the whole contact net dynamics model is built, firstly, a contact net dynamics model corresponding to a span is obtained, at the moment, setting of a hanger force element is completed by receiving input force element information comprising rigidity and damping, meanwhile, a pre-applied load is set for the hanger force element for acting on a contact line model and a carrier rope model initially, further, the construction of the model of the span is completed, finally, the contact net model formed by the contact line model and the carrier rope model is subjected to regional coverage according to the obtained contact net dynamics model, and a flexible dynamics model is obtained through coverage and modification.
And 105, loading a rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain an arch network coupling dynamics model.
After the flexible dynamics model is constructed, in order to realize coupling with the pantograph, a rigid dynamics model corresponding to the pantograph can be built at the moment, and then a pantograph-net coupling dynamics model is obtained through coupling.
When the rigid dynamics model is constructed, the rigid dynamics model can be obtained by inputting related pantograph parameters, constructing the model, and then completing the coupling of the model through the contact force elements of the pantograph net. Thus, when deriving the bownet coupling dynamics model, it includes: receiving input pantograph parameters, and obtaining a rigid dynamics model based on the pantograph parameters; and coupling the rigid dynamics model and the flexible dynamics model to obtain the bow net coupling dynamics model.
After the bow net coupling dynamics model is obtained, the model can be used for subsequent analysis and research, such as simulation for running conditions under different scenes. By the aid of the bow net coupling dynamics model obtained at the moment, simulation research with high accuracy and high efficiency can be completed.
Referring to fig. 3, fig. 3 is another flow chart of the steps for constructing an arch net coupling dynamics model provided by the present invention.
According to the steps shown in fig. 3, when the construction is carried out, force elements are established at the corresponding positions of the flexible contact line with tension and the carrier cable, the contact net is automatically shaped through preloading operation, the whole bow net is established through replication and modification of the established cross-hanger force elements, and then the bow net coupling dynamics model is conveniently and effectively established by coupling the multi-rigid-body pantograph three-dimensional entity model capable of simulating the real relative movement of each component.
Wherein, when establishing the bow net coupling dynamics model, the method comprises the following steps:
301. the flexible pretreatment is carried out on the contact wire and the carrier cable by a finite element method: preparing a required file for the flexibility of the contact line and the carrier cable by a finite element method;
the specific operation is as follows, taking contact line as an example:
firstly, setting material performance, three-dimensional beam unit type, cross section and characteristic information, further establishing a contact line model capable of reflecting real performance, and storing the set file by using a CDB format;
then, a contact line main node is set, and the substructure solving is carried out. Applying tension to one end of a fixed contact line and the other end of the fixed contact line, carrying out statics solving, and storing a file obtained by solving by utilizing a DB format;
and finally, opening a prestress switch, wherein the prestress is stress generated when tension and gravity are applied, solving a prestress substructure, and storing a file obtained by solving by utilizing a SUB format.
Through the steps, the CDB format file, the DB format file and the SUB format file which are needed by the flexible treatment of the contact line are obtained, and the method is the same when the CDB format file, the DB format file and the SUB format file which are needed by the flexible treatment of the bearing cable are obtained.
302. Generating a flexible model of the contact line and the carrier cable in multi-body dynamics software: in the multi-body dynamics software, generating a contact line and a bearing rope flexible file by utilizing the CDB format file, the DB format file and the SUB format file generated in the step 301;
303. constraint is applied at the position where the contact line is connected with the dropper, and the acting force of the contact line on the dropper is obtained through the counter force of the vertical constraint and is used as the pre-applied load of the dropper in the multi-body dynamics modeling: utilizing the contact line model established in the step 301 to apply constraint at two ends, constraint at the joint between spans, initial strain caused by gravity acceleration and tension, and vertical constraint at the hanger, and obtaining the acting force of the contact line on the hanger through the counter-force of the vertical constraint, wherein the acting force is used as the pre-applied load of the hanger in the multi-body dynamics modeling;
304. setting the flexible body frequency and the modal number of the contact line and the carrier cable, and generating Marker points at the main node: in the multi-body dynamics software, a flexible file of a contact line and a carrier cable is imported, and the flexible body frequency range and the modal number of the contact line and the carrier cable are set;
305. through the force element connection Marker point, set up rigidity and damping, accomplish the dropper modeling to set up the pre-applied load: in the multi-body dynamics software, the force element is established by connecting the force element with the Marker point of the contact line and the carrier cable, setting rigidity and damping, and setting the pre-applied load of the hanger wire obtained in the step 303, wherein the establishment of the force element is equivalent to the completion of the hanger wire modeling of the contact line and the carrier cable;
306. in the multi-body dynamics software, a pantograph rigid model is established, and all the components are connected together through a hinge rotating pair, a restraint pair and the like: in the multi-body dynamics software, a rigid entity pantograph dynamics model is established. Each component adopts a rigid body, and the chassis is connected with the lower arm, the chassis is connected with the lower pull rod, the upper arm is connected with the lower arm, the upper arm is connected with the lower pull rod, the upper arm is connected with the upper pull rod, the upper arm is connected with the bow head, and the upper pull rod is connected with the bow head through a plurality of hinged rotating pairs, restraining pairs and the like, as shown in fig. 4.
For example: the bow-head sliding plate and the bow head can move up and down through the moving pair, and the bow-head sliding plate is provided with 2 bow-head spring force elements for simulating interaction between the bow-head sliding plate and the bow head; the underframe insulator is fixedly connected to the roof through a fixing pair; the force element of the pantograph lifting spring is connected between the lower arm and the underframe to lift the pantograph and maintain a certain static lifting force.
307. The method comprises the steps that Marker points which move along with a pantograph are arranged at the positions, corresponding to the sliding plates, on contact lines, the corresponding Marker points on the pantograph are connected through force elements, rigidity, damping and pre-applied load are set, so that bow net contact force is applied, and bow net coupling dynamics modeling is completed: in the multi-body dynamics software, marker points which move along with the pantograph are arranged at the positions corresponding to the sliding plates on the contact lines, the corresponding Marker points on the pantograph are connected through force elements, rigidity, damping and pre-applied load are set, so that the contact force of the pantograph net is applied, and the coupling dynamics modeling of the pantograph net is completed.
As shown in fig. 5;
308. debugging and carrying out relevant analysis work: and carrying out debugging and further analysis and research work on the finished rigid-flexible coupling model of the bow net.
In the method for constructing the bow net coupling dynamics model in the embodiment, when the bow net coupling dynamics model is constructed, firstly, constructing the flexible dynamics model, including constructing a contact line model and a carrier rope model according to a flexible file, then establishing force elements according to a hanger point determined on the contact line model and the carrier rope model, applying relevant force element settings, further obtaining a flexible dynamics model of a contact net formed by the contact line and the carrier rope, and finally loading relevant rigid dynamics models to perform model coupling treatment to obtain the bow net coupling dynamics model. The method realizes the quick establishment of force elements at the corresponding positions of the flexible contact line and the carrier cable, completes the automatic shape finding of the contact net through preloading, and enables the model construction to be more accurate and real through the flexible contact net with tension, the three-dimensional entity hinged pantograph and the bow net coupling.
The device for constructing the bow net coupling dynamics model provided by the invention is described below, and the device for constructing the bow net coupling dynamics model described below and the method for constructing the bow net coupling dynamics model described above can be correspondingly referred to each other.
Fig. 6 is a schematic structural diagram of a device for constructing an bow net coupling dynamics model according to the present invention, as shown in fig. 6, the device 600 for constructing an bow net coupling dynamics model includes:
the file acquisition module 601 is configured to construct and obtain a contact line model and a catenary model according to the flexible file;
the force element establishment module 602 is configured to determine a dropper point on the contact line model and the carrier rope model, and establish a dropper force element between the contact line model and the carrier rope model at the dropper point;
the constraint setting module 603 is configured to apply a constraint at a dropper point, so as to obtain a pre-applied load of the contact line model on the dropper force element;
the model construction module 604 is configured to construct a flexible dynamics model according to the contact line model, the carrier rope model, the pre-applied load and the force element;
the model coupling module 605 is configured to load the rigid dynamics model, and couple the rigid dynamics model and the flexible dynamics model to obtain an arch network coupling dynamics model.
Based on the above embodiment, the force element establishment module 602 is further configured to:
determining a spanning starting point and a spanning end point of a spanning on a contact line model, and obtaining a modeling interval according to the spanning starting point and the spanning end point, wherein the modeling interval is obtained based on adjacent spanning starting points and spanning end points;
determining a hanger starting point in the modeling interval, and determining a hanger end point on the carrier rope model according to the hanger starting point;
and establishing a hanger force element between the contact line and the carrier cable according to the hanger starting point and the hanger ending point.
Based on the above embodiment, the constraint setting module 603 is further configured to:
and obtaining initial strain in a flexible file corresponding to the contact line model, applying constraints at two ends of the contact line model, applying constraints at the joint between spans, and applying gravitational acceleration and the initial strain.
Based on the above embodiment, the constraint setting module 603 is further configured to:
at the hanger point of the contact line model, applying a constraint in the vertical direction;
and determining the acting force of the contact line model at the dropper point according to the constraint and the initial strain, and taking the acting force as the pre-applied load of the dropper force element at the dropper point.
Based on the above embodiment, the model building module 604 is further configured to:
receiving force element information of input hanger force elements;
obtaining a contact net dynamics model corresponding to the modeling interval according to the contact line model, the catenary model, the pre-applied load and the force element information;
and (3) according to the contact net dynamic model, performing area coverage on the contact net formed by the contact wire model and the carrier cable model to obtain a flexible dynamic model.
Based on the above embodiment, the model coupling module 605 is further configured to:
receiving input pantograph parameters, and obtaining a rigid dynamics model according to the pantograph parameters;
and coupling the rigid dynamics model and the flexible dynamics model to obtain the bow net coupling dynamics model.
Based on the above embodiment, the file acquisition module 601 is further configured to:
and receiving input material data of the contact line and the carrier cable, and generating and obtaining flexible files corresponding to the contact line and the carrier cable respectively according to the material data, wherein the material data at least comprises material performance, three-dimensional beam unit type, cross section and characteristic information thereof.
In the device for constructing the bow net coupling dynamics model in the above embodiment, when the bow net coupling dynamics model is constructed, firstly, constructing the flexible dynamics model, including constructing a contact line model and a carrier rope model according to a flexible file, then, establishing force elements according to a hanger point determined on the contact line model and the carrier rope model, and obtaining a flexible dynamics model of a contact net formed by the contact line and the carrier rope by applying relevant force element settings, and finally, loading relevant rigid dynamics models to perform model coupling treatment to obtain the bow net coupling dynamics model. The method has the advantages that the force elements are built at the corresponding positions of the flexible contact line and the carrier cable rapidly, the contact net is automatically shaped through preloading, and the model is built more accurately and truly through the flexible contact net with tension, the three-dimensional entity hinged pantograph and the bow net coupling.
Fig. 7 illustrates a physical schematic diagram of an electronic device, as shown in fig. 7, which may include: processor 710, communication interface (Communications Interface) 720, memory 730, and communication bus 740, wherein processor 710, communication interface 720, memory 730 communicate with each other via communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform a method of constructing a bownet coupling dynamics model, the method comprising: constructing a contact line model and a carrier cable model according to the flexible file; determining a hanger point on the contact line model and the carrier rope model, and establishing a hanger force element between the contact line model and the carrier rope model at the hanger point; constraint is applied to a hanger point, so that a pre-applied load of a contact line model to a hanger force element is obtained; constructing and obtaining a flexible dynamic model according to the contact line model, the carrier cable model, the pre-applied load and the hanger force element; and loading the rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain the bow net coupling dynamics model.
Further, the logic instructions in the memory 730 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer can execute a method for constructing an arch network coupling dynamics model provided by the above methods, and the method includes: constructing a contact line model and a carrier cable model according to the flexible file; determining a hanger point on the contact line model and the carrier rope model, and establishing a hanger force element between the contact line model and the carrier rope model at the hanger point; constraint is applied to a hanger point, so that a pre-applied load of a contact line model to a hanger force element is obtained; constructing and obtaining a flexible dynamic model according to the contact line model, the carrier cable model, the pre-applied load and the hanger force element; and loading the rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain the bow net coupling dynamics model.
In yet another aspect, the present invention further provides a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, is implemented to perform a method for constructing an archwire coupling dynamics model provided by the above methods, the method comprising: constructing a contact line model and a carrier cable model according to the flexible file; determining a hanger point on the contact line model and the carrier rope model, and establishing a hanger force element between the contact line model and the carrier rope model at the hanger point; constraint is applied to a hanger point, so that a pre-applied load of a contact line model to a hanger force element is obtained; constructing and obtaining a flexible dynamic model according to the contact line model, the carrier cable model, the pre-applied load and the hanger force element; and loading the rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain the bow net coupling dynamics model.
The apparatus 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.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution 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 computer readable storage medium, such as 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 respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The method for constructing the bow net coupling dynamics model is characterized by comprising the following steps of:
constructing a contact line model and a carrier cable model according to the flexible file;
determining a dropper point on the contact line model and the carrier rope model, and establishing a dropper force element between the contact line model and the carrier rope model at the dropper point;
applying constraint at the hanger point to obtain a pre-applied load of the contact line model to the hanger force element;
constructing and obtaining a flexible dynamics model according to the contact line model, the carrier rope model, the pre-applied load and the hanger force element;
loading a pantograph rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain a pantograph-net coupling dynamics model.
2. The method of constructing an arch net coupling dynamics model according to claim 1, wherein determining a dropper point on the contact line model and establishing a dropper force element between the contact line and the carrier rope at the dropper point comprises:
determining a spanning starting point and a spanning end point of a spanning on the contact line model, and obtaining a modeling interval according to the spanning starting point and the spanning end point, wherein the modeling interval is obtained based on the adjacent spanning starting point and spanning end point;
determining a hanger starting point in the modeling interval, and determining a hanger end point on the carrier rope model according to the hanger starting point;
and establishing a hanger force element between the contact line and the carrier cable according to the hanger starting point and the hanger ending point.
3. The method of constructing an arch net coupling dynamics model according to claim 2, wherein said applying a constraint at said hanger point, prior to obtaining a pre-applied load of said contact line model to said force element, further comprises:
and obtaining initial strain in a flexible file corresponding to the contact line model, applying constraints at two ends of the contact line model, applying constraints at the joint between spans, and applying gravitational acceleration and the initial strain.
4. A method of constructing an arch net coupling dynamics model according to claim 3, wherein said applying a constraint at said hanger point results in a pre-applied load of said contact line model to said hanger force element, comprising:
applying a constraint in a vertical direction at the hanger point of the contact line model;
determining a force to the contact line model at the hanger point based on the constraint and the initial strain, and taking the force as a pre-applied load to the hanger force element at the hanger point.
5. The method for constructing an arch net coupling dynamics model according to claim 2, wherein the constructing a flexible dynamics model according to the contact line model, the catenary model, the pre-applied load and the dropper force element comprises:
receiving input force element information of the hanger force element;
obtaining a contact net dynamics model corresponding to the modeling interval according to the contact line model, the carrier rope model, the pre-applied load and the force element information;
and according to the contact net dynamics model, performing area coverage on the contact net formed by the contact line model and the carrier rope model to obtain a flexible dynamics model.
6. The method for constructing an arch network coupling dynamics model according to claim 2, wherein the loading the rigid dynamics model and coupling the rigid dynamics model and the flexible dynamics model to obtain the arch network coupling dynamics model comprises:
receiving input pantograph parameters, and obtaining a rigid dynamics model according to the pantograph parameters;
and coupling the rigid dynamics model and the flexible dynamics model to obtain an arch network coupling dynamics model.
7. The method for constructing an arch network coupling dynamics model according to claim 1, wherein the method comprises:
and receiving input material data of the contact line and the carrier cable, and generating and obtaining flexible files corresponding to the contact line and the carrier cable respectively according to the material data, wherein the material data at least comprises material performance, three-dimensional beam unit type, cross section and characteristic information.
8. The device for constructing the bow net coupling dynamics model is characterized by comprising the following components:
the file acquisition module is used for constructing and obtaining a contact line model and a carrier cable model according to the flexible file;
the force element establishing module is used for determining a hanger point on the contact line model and the carrier rope model and establishing a hanger force element between the contact line model and the carrier rope model at the hanger point;
the constraint setting module is used for applying constraint at the hanger point to obtain a pre-applied load of the contact line model on the hanger force element;
the model construction module is used for constructing and obtaining a flexible dynamics model according to the contact line model, the carrier rope model, the pre-applied load and the hanger force element;
and the model coupling module is used for loading a rigid dynamics model, and coupling the rigid dynamics model and the flexible dynamics model to obtain an arch network coupling dynamics model.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of constructing the bownet coupling dynamics model of any one of claims 1 to 7 when the program is executed by the processor.
10. A non-transitory computer readable storage medium, having stored thereon a computer program, which when executed by a processor, implements a method of constructing an archwire coupling dynamics model according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310519706.8A CN116561893A (en) | 2023-05-09 | 2023-05-09 | Modeling method and related equipment for bow net coupling dynamics model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310519706.8A CN116561893A (en) | 2023-05-09 | 2023-05-09 | Modeling method and related equipment for bow net coupling dynamics model |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116561893A true CN116561893A (en) | 2023-08-08 |
Family
ID=87495969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310519706.8A Pending CN116561893A (en) | 2023-05-09 | 2023-05-09 | Modeling method and related equipment for bow net coupling dynamics model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116561893A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117610383A (en) * | 2024-01-22 | 2024-02-27 | 中铁电气化勘测设计研究院有限公司 | Rigid contact net parameter selection method and parameter result based on bow net coupling simulation |
-
2023
- 2023-05-09 CN CN202310519706.8A patent/CN116561893A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117610383A (en) * | 2024-01-22 | 2024-02-27 | 中铁电气化勘测设计研究院有限公司 | Rigid contact net parameter selection method and parameter result based on bow net coupling simulation |
| CN117610383B (en) * | 2024-01-22 | 2024-05-17 | 中铁电气化勘测设计研究院有限公司 | Rigid contact net parameter selection method based on bow net coupling simulation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105956268B (en) | Test scene construction method and device applied to pilotless automobile | |
| CN116561893A (en) | Modeling method and related equipment for bow net coupling dynamics model | |
| Kwon et al. | A framework for multi-site distributed simulation and application to complex structural systems | |
| US8014982B2 (en) | Simulation system for a construction crane and the simulation method thereof | |
| KR102282970B1 (en) | the method for configuring and controling real-time distributed autonomous driving simulation framework | |
| CN104899218B (en) | Data read-write method and data read-write equipment | |
| JP2015102522A (en) | Travel simulation device of overhead wire/pantograph system | |
| JP5188428B2 (en) | Railway vehicle behavior simulation apparatus and behavior simulation method | |
| CN115185205A (en) | Intelligent driving simulation method, system, terminal device and readable storage medium | |
| CN109325900A (en) | A kind of dispositions method and system of algorithm | |
| CN111381513A (en) | Ultra-high-speed electromagnetic propulsion control semi-physical simulation system and simulation method | |
| Gil et al. | Finite element periodic catenary model to perform HIL pantograph tests considering non-linear dropper behaviour | |
| CN115221799A (en) | Multi-branch-based unmanned cluster super-real-time deduction system and method | |
| WO2018151492A1 (en) | System and method for generating three-dimensional model of infrastructure | |
| CN105185180A (en) | Online testing method and device | |
| JP5254095B2 (en) | Railway vehicle behavior simulation apparatus and behavior simulation method | |
| CN110617930B (en) | Method, device and system for simulating rail coupling vibration test | |
| CN113779692A (en) | Rigid-elastic vehicle track coupling multi-software linkage simulation system and method | |
| CN113343422A (en) | Rail transit operation simulation method and system | |
| CN102542124A (en) | Pull cable prestressing simulating analysis method for steel building structure | |
| Blaauw et al. | Structural analysis of a swinging fairground attraction using a novel implementation of reduced order modeling in multibody dynamics | |
| CN116500910A (en) | Verification method and device for lunar mission planning path of detector | |
| CN108183812A (en) | A kind of diesel engine electric control system CAN bus emulation platform and its test method | |
| Tsokanas et al. | Three-level verification and validation approach for motorcycle subsystem testing using physical/virtual co-simulation | |
| Sarbia et al. | Virtual testing of a new conjecture for the stone ascending device in Egyptian pyramids by means of a multibody dynamics simulation |
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 |