CN114239132A - Temperature field simulation method and device for composite material automobile brake disc - Google Patents
Temperature field simulation method and device for composite material automobile brake disc Download PDFInfo
- Publication number
- CN114239132A CN114239132A CN202111413545.1A CN202111413545A CN114239132A CN 114239132 A CN114239132 A CN 114239132A CN 202111413545 A CN202111413545 A CN 202111413545A CN 114239132 A CN114239132 A CN 114239132A
- Authority
- CN
- China
- Prior art keywords
- brake disc
- geometric model
- temperature
- temperature field
- simulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000004088 simulation Methods 0.000 title claims abstract description 53
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 70
- 238000004458 analytical method Methods 0.000 claims abstract description 57
- 238000004364 calculation method Methods 0.000 claims abstract description 9
- 230000015654 memory Effects 0.000 claims description 25
- 238000004590 computer program Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 8
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 13
- 238000012545 processing Methods 0.000 description 13
- 230000006870 function Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 7
- 230000000452 restraining effect Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Images
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]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/04—Constraint-based CAD
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/26—Composites
-
- 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
- G06F2119/08—Thermal analysis or thermal optimisation
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a temperature field simulation method and a temperature field simulation device for a composite material automobile brake disc, wherein the method comprises the steps of introducing a geometric model of the brake disc, and setting material parameters of the geometric model based on the composite material attribute of the brake disc; determining analysis steps of the geometric model, and setting boundary conditions and initial conditions for each analysis step respectively; and simulating and calculating a temperature field cloud picture corresponding to the geometric model based on the analysis step. According to the method, the simulation calculation of the temperature field cloud chart is carried out on the geometric model after the material parameters of the constructed geometric model are set according to the composite material attributes of the brake disc, and when the simulation result is not ideal, the material design optimization can be carried out on the parts only by adjusting the material parameters, so that the design cost is reduced.
Description
Technical Field
The application relates to the technical field of automobile material temperature simulation, in particular to a method and a device for simulating a temperature field of an automobile brake disc made of a composite material.
Background
The brake disc commonly used for the vehicle at present is a cast iron or forged steel brake disc, and the material of the brake disc is high in density, poor in thermal conductivity and prone to thermal damage. However, the aluminum matrix composite has the characteristics of small thermal expansion coefficient, low density, high temperature resistance, wear resistance and the like, so that in recent years, a great deal of research is carried out on the processing aspect of the aluminum matrix composite at home and abroad, but at present, the simulation of the temperature field of the brake disc conforming to the material of the aluminum matrix at home is still in the starting research stage, and a specific method of the temperature field square matrix is not available, so that research personnel cannot effectively analyze the designed brake disc in the research and development process.
Disclosure of Invention
In order to solve the above problems, the embodiments of the present application provide a method and an apparatus for simulating a temperature field of an automobile brake disc made of a composite material.
In a first aspect, an embodiment of the present application provides a method for simulating a temperature field of a composite material automobile brake disc, where the method includes:
importing a geometric model of a brake disc, and setting material parameters of the geometric model based on the composite material property of the brake disc;
determining analysis steps of the geometric model, and setting boundary conditions and initial conditions for each analysis step respectively;
and simulating and calculating a temperature field cloud picture corresponding to the geometric model based on the analysis step.
Preferably, before the introducing the geometric model of the brake disc, the method further includes:
determining the geometric dimension of the brake disc, and constructing a geometric model of the brake disc based on the geometric dimension.
Preferably, the material parameters include density, modulus of elasticity, poisson's ratio, coefficient of thermal expansion, thermal conductivity, and specific heat capacity.
Preferably, before the calculating the temperature field cloud map corresponding to the geometric model based on the analysis step simulation, the method further includes:
and performing local seed distribution on all edges of the geometric model based on a preset size, and dividing unit meshes on the geometric model.
Preferably, after the calculating the temperature field cloud map corresponding to the geometric model based on the analysis step simulation, the method further includes:
obtaining the highest temperature of a brake disc made of a traditional material, and determining the highest temperature of the brake disc according to the temperature field cloud picture;
comparing the highest temperature of the brake disc made of the traditional material with the highest temperature of the brake disc;
when the highest temperature of the brake disc is higher than that of the brake disc made of the traditional material, and the temperature difference between the highest temperature of the brake disc made of the traditional material and the highest temperature of the brake disc is larger than a preset difference, adjusting the material parameters based on the highest temperature of the brake disc, and repeating the step of simulating and calculating the temperature field cloud chart corresponding to the geometric model based on the analysis step;
and when the highest temperature of the brake disc is higher than the highest temperature of the brake disc made of the traditional material, and the temperature difference between the highest temperature of the brake disc made of the traditional material and the highest temperature of the brake disc is not larger than a preset difference, or the highest temperature of the brake disc is not higher than the highest temperature of the brake disc made of the traditional material, constructing a brake disc temperature field line graph corresponding to the geometric model based on the temperature field cloud graph.
Preferably, after determining the analysis steps of the geometric model and setting the boundary condition and the initial condition for each analysis step, the method further includes:
constructing a three-dimensional coordinate system based on the geometric model so as to enable the Z direction of the three-dimensional coordinate system to be perpendicular to the brake disc surface of the geometric model;
determining a center reference point corresponding to a brake disc bolt hole in the geometric model, and applying first constraint forces in the X direction and the Y direction to the center reference point respectively;
determining a first position corresponding to a brake disc cap in the geometric model, and applying a second constraint force in the Z direction to the inner ring surface of the brake disc cap to constrain the linear displacement of the brake disc along the axial direction;
and determining a second position corresponding to the brake block in the geometric model, and applying third constraint forces in the X direction and the Y direction to the brake block respectively.
Preferably, after the calculating the temperature field cloud map corresponding to the geometric model based on the analysis step simulation, the method further includes:
determining the maximum simulation temperature stress of the brake disc according to the temperature field cloud chart, and acquiring the allowable stress of the composite material;
comparing the maximum brake disc simulation temperature stress with the allowable stress;
when the maximum simulation temperature stress of the brake disc is larger than the allowable stress, adjusting the material parameters based on the maximum temperature of the brake disc, and repeating the step of simulating and calculating the temperature field cloud chart corresponding to the geometric model based on the analysis step;
and when the maximum simulation temperature stress of the brake disc is not larger than the allowable stress, constructing a brake disc temperature stress line graph corresponding to the geometric model based on the temperature field cloud graph.
In a second aspect, an embodiment of the present application provides a temperature field simulation apparatus for a composite material automobile brake disc, the apparatus includes:
the system comprises an importing module, a calculating module and a calculating module, wherein the importing module is used for importing a geometric model of a brake disc and setting material parameters of the geometric model based on composite material properties of the brake disc;
the determining module is used for determining the analysis steps of the geometric model and respectively setting boundary conditions and initial conditions for each analysis step;
and the calculation module is used for simulating and calculating the temperature field cloud picture corresponding to the geometric model based on the analysis step.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the steps of the method as provided in the first aspect or any one of the possible implementation manners of the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method as provided in the first aspect or any one of the possible implementations of the first aspect.
The invention has the beneficial effects that: 1. after the material parameters of the constructed geometric model are set according to the composite material attributes of the brake disc, the geometric model is subjected to simulation calculation of the temperature field cloud picture, and when the simulation result is unsatisfactory, the material design optimization can be performed on the parts only by adjusting the material parameters, so that the design cost is reduced.
2. According to different working conditions, different boundary conditions and initial conditions are set, qualitative and quantitative analysis is further performed on the geometric model, the distribution characteristics and the distribution rule of the temperature field can be determined, and effective reference is provided for analysis of the heat fading resistance of the brake disc.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in 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 application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for simulating a temperature field of a composite material automobile brake disc according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a temperature field simulation device of a composite material automobile brake disc provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In the following description, the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance. The following description provides embodiments of the present application, where different embodiments may be substituted or combined, and thus the present application is intended to include all possible combinations of the same and/or different embodiments described. Thus, if one embodiment includes feature A, B, C and another embodiment includes feature B, D, then this application should also be considered to include an embodiment that includes one or more of all other possible combinations of A, B, C, D, even though this embodiment may not be explicitly recited in text below.
The following description provides examples, and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements described without departing from the scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than the order described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined into other examples.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for simulating a temperature field of a composite material automobile brake disc provided in an embodiment of the present application. In an embodiment of the present application, the method includes:
s101, importing a geometric model of the brake disc, and setting material parameters of the geometric model based on the composite material property of the brake disc.
The execution main body of the application can be a processor of the terminal and is used for controlling and processing simulation software in the terminal. The terminal can be a computer terminal, a mobile terminal and the like.
In the embodiment of the application, in order to perform temperature simulation determination on the brake disc made of the composite material, a designer generates a geometric model of the brake disc in a previous design process. The processor imports the geometric model in the designated simulation software, and sets the material parameters of the imported geometric model according to the material properties corresponding to the composite material used for design. Wherein, the simulation software can select ABAQUS finite element analysis software which comprises a rich unit library capable of simulating any geometric shape. The ABAQUS can not only solve a large number of structural (stress/displacement) problems, but also simulate a plurality of problems in other engineering fields, such as heat conduction, mass diffusion, thermoelectric coupling analysis, acoustic analysis, geomechanical analysis (fluid permeation/stress coupling analysis) and piezoelectric medium analysis. The composite material can be SiCp/Al composite material with high volume fraction.
In an implementation manner, before step S101, the method further includes:
determining the geometric dimension of the brake disc, and constructing a geometric model of the brake disc based on the geometric dimension.
In the embodiment of the application, the processor can define the outline dimension according to the design requirement of the brake disc of the component manufacturer. For example, the geometric requirements of the brake disc can be 198mm of outer diameter, 121mm of inner diameter and 34mm of thickness. The processor can autonomously construct a geometric model of the brake disc in Solidworks three-dimensional modeling software according to the determined geometric dimension.
In one possible embodiment, the material parameters include density, modulus of elasticity, poisson's ratio, coefficient of thermal expansion, thermal conductivity, specific heat capacity.
In the embodiment of the application, since the relevant data of the composite material is easier to change compared with the single conventional material, for the accuracy of calculation, in addition to the conventional parameters such as density, thermal conductivity and specific heat capacity, the parameters such as elastic modulus, poisson ratio and thermal expansion coefficient are set when the material parameters are set.
S102, determining analysis steps of the geometric model, and setting boundary conditions and initial conditions for each analysis step respectively.
In the embodiment of the present application, the loading process of the analog computation includes a single step or a plurality of steps, so the analysis step is defined. It typically includes analysis process selection, load selection, output requirement selection. And each analysis step can adopt different loads, boundary conditions, analysis processes and output requirements. For example, in the simulation of creep forming, typical three processes are involved, namely compression, retention of a compression state for a certain time, and unloading, and three analysis steps are defined for the process, and the three processes are simulated respectively. Specifically, the analysis step can be a Dynamic, Temp-disp or Explicit analysis step, and the processor can set boundary conditions and initial conditions of the analysis step according to the working condition environment that the brake disc may experience when actually put into production and use. Boundary conditions refer to the law of change over time and place of the variables or their derivatives being solved for at the boundaries of the solution area. The initial condition refers to the initial state in which the process takes place, i.e. the value of the unknown function and its partial derivatives of each order over time at the initial instant t = 0. The specific arrangement of the boundary conditions and the initial conditions needs to be determined according to the expected working condition of the brake disc designed at the present time.
S103, simulating and calculating a temperature field cloud picture corresponding to the geometric model based on the analysis step.
In the embodiment of the application, after the analysis step, the boundary condition and the initial condition are determined, the operation file can be created in the operation module of the simulation software according to the analysis step and solved, so that the temperature field cloud chart corresponding to the geometric model is obtained through simulation calculation. Through the temperature field cloud chart, a designer can determine temperature change data of the characteristic points of the brake disc surface at different initial speeds (namely initial conditions). And the designer can analyze the temperature field change of the brake disc designed at the time when the brake disc is put into the expected environment for use based on the obtained temperature field cloud picture so as to determine the rationality and the point to be improved of the brake disc design.
In an implementation manner, before the calculating the temperature field cloud map corresponding to the geometric model based on the analyzing step simulation, the method further includes:
and performing local seed distribution on all edges of the geometric model based on a preset size, and dividing unit meshes on the geometric model.
In the embodiment of the application, before the calculation of the temperature field cloud image is performed, in order to improve the efficiency and accuracy of simulation calculation, the unit grids are divided on the geometric model, so that the subsequent calculation can be performed by the unit grids with smaller volume. Specifically, all edges of the geometric model are determined first, and each edge is locally laid out based on a preset size as a pitch. The local seed distribution process is that a plurality of seeds are arranged on the edge according to the preset size, and the seeds are used as the standard for dividing the unit grid, namely, the edge of one unit grid can be determined between two adjacent seeds on one edge of the geometric model. The grid type can be C3D8RT, and the approximate unit side length of each unit grid can be 5 mm.
In an implementation manner, after the calculating the temperature field cloud map corresponding to the geometric model based on the analyzing step simulation, the method further includes:
obtaining the highest temperature of a brake disc made of a traditional material, and determining the highest temperature of the brake disc according to the temperature field cloud picture;
comparing the highest temperature of the brake disc made of the traditional material with the highest temperature of the brake disc;
when the highest temperature of the brake disc is higher than that of the brake disc made of the traditional material, and the temperature difference between the highest temperature of the brake disc made of the traditional material and the highest temperature of the brake disc is larger than a preset difference, adjusting the material parameters based on the highest temperature of the brake disc, and repeating the step of simulating and calculating the temperature field cloud chart corresponding to the geometric model based on the analysis step;
and when the highest temperature of the brake disc is higher than the highest temperature of the brake disc made of the traditional material, and the temperature difference between the highest temperature of the brake disc made of the traditional material and the highest temperature of the brake disc is not larger than a preset difference, or the highest temperature of the brake disc is not higher than the highest temperature of the brake disc made of the traditional material, constructing a brake disc temperature field line graph corresponding to the geometric model based on the temperature field cloud graph.
In the embodiment of the application, the composite material is formed by combining different SiCp/Al composite materials with high volume fractions, namely, the material parameters are different according to different specific materials and different material proportions of the combination, and any material combination is not suitable for the brake disc. Therefore, after the temperature field cloud picture is generated, the highest temperature of the brake disc in the temperature field cloud picture is compared according to the fluctuation range of the highest temperature corresponding to the brake disc made of the traditional material, if the highest temperature of the brake disc exceeds the preset difference value of the highest temperature of the brake disc made of the traditional material, the highest temperature of the brake disc is considered to be far greater than the highest temperature of the brake disc made of the traditional material, and under the condition, the risk that the local temperature is too high may occur to the brake disc produced based on the current material parameters, and potential safety hazards exist in the actual driving process, so that the material parameters need to be adjusted by the temperature field cloud picture, and the highest temperature of the finally obtained temperature field cloud picture is within a reasonable range. And if the result of the temperature field cloud picture meets the requirement, entering a post-processing stage, and outputting a brake disc temperature field line graph drawn by the simulation result of the temperature field cloud picture so as to facilitate the data analysis of designers.
In an embodiment, after determining the analysis steps of the geometric model and setting the boundary condition and the initial condition for each of the analysis steps, the method further includes:
constructing a three-dimensional coordinate system based on the geometric model so as to enable the Z direction of the three-dimensional coordinate system to be perpendicular to the brake disc surface of the geometric model;
determining a center reference point corresponding to a brake disc bolt hole in the geometric model, and applying first constraint forces in the X direction and the Y direction to the center reference point respectively;
determining a first position corresponding to a brake disc cap in the geometric model, and applying a second constraint force in the Z direction to the inner ring surface of the brake disc cap to constrain the linear displacement of the brake disc along the axial direction;
and determining a second position corresponding to the brake block in the geometric model, and applying third constraint forces in the X direction and the Y direction to the brake block respectively.
In the embodiment of the application, the temperature field cloud picture can represent the change situation of the temperature along with the time under different initial speed initial conditions, and can also analyze the temperature stress change in the whole process. Therefore, in order to determine the temperature stress change in the temperature field cloud picture, the surface load borne by the brake disc during braking is added according to a brake disc mechanics model. Specifically, in order to ensure that the relevant temperature stress data of the geometric model can be obtained, constraint forces are respectively set at a reference point at a disc center corresponding to a brake disc bolt hole, a brake disc cap and a brake pad. The first restraining force, the second restraining force, and the third restraining force may be the same or may be provided separately. Taking the third restraining force as an example, the third restraining force applied to the backing plates of the brake pads on both sides in the geometric model may be a surface load of 1.7 MPa.
In an implementation manner, after the calculating the temperature field cloud map corresponding to the geometric model based on the analyzing step simulation, the method further includes:
determining the maximum simulation temperature stress of the brake disc according to the temperature field cloud chart, and acquiring the allowable stress of the composite material;
comparing the maximum brake disc simulation temperature stress with the allowable stress;
when the maximum simulation temperature stress of the brake disc is larger than the allowable stress, adjusting the material parameters based on the maximum temperature of the brake disc, and repeating the step of simulating and calculating the temperature field cloud chart corresponding to the geometric model based on the analysis step;
and when the maximum simulation temperature stress of the brake disc is not larger than the allowable stress, constructing a brake disc temperature stress line graph corresponding to the geometric model based on the temperature field cloud graph.
In the embodiment of the application, after the surface load applied to the brake disc during braking is added, the maximum simulation temperature stress of the brake disc can be determined from the temperature field cloud picture, and after the composition of the composite material is determined, the corresponding allowable stress of the composite material is determined. Therefore, when the maximum simulation temperature stress of the brake disc is larger than the allowable stress, the material parameters also need to be adjusted. And only when the maximum simulation temperature stress of the brake disc is not more than the allowable stress, constructing a brake disc temperature stress line graph so as to facilitate the designer to carry out design reference.
The temperature field simulation device for the composite material automobile brake disc provided by the embodiment of the application will be described in detail below with reference to fig. 2. It should be noted that, the temperature field simulation apparatus for a composite material automobile brake disc shown in fig. 2 is used for executing the method of the embodiment shown in fig. 1 of the present application, for convenience of description, only the portion related to the embodiment of the present application is shown, and details of the technology are not disclosed, please refer to the embodiment shown in fig. 1 of the present application.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a temperature field simulation apparatus for an automobile brake disc made of a composite material according to an embodiment of the present disclosure. As shown in fig. 2, the apparatus includes:
an importing module 201, configured to import a geometric model of a brake disc, set material parameters of the geometric model based on composite material properties of the brake disc;
a determining module 202, configured to determine analysis steps of the geometric model, and set a boundary condition and an initial condition for each analysis step;
and the calculating module 203 is used for calculating the temperature field cloud picture corresponding to the geometric model based on the analysis step simulation.
In one embodiment, the apparatus further comprises:
the model building module is used for determining the geometric dimension of the brake disc and building a geometric model of the brake disc based on the geometric dimension.
In one possible embodiment, the material parameters include density, modulus of elasticity, poisson's ratio, coefficient of thermal expansion, thermal conductivity, specific heat capacity.
In one embodiment, the apparatus further comprises:
and the dividing module is used for carrying out local seed distribution on all edges of the geometric model based on preset sizes and dividing unit grids on the geometric model.
In one embodiment, the apparatus further comprises:
the first acquisition module is used for acquiring the highest temperature of the traditional material brake disc and determining the highest temperature of the brake disc according to the temperature field cloud picture;
the first comparison module is used for comparing the highest temperature of the traditional material brake disc with the highest temperature of the brake disc;
the first processing module is used for adjusting the material parameters based on the highest brake disc temperature when the highest brake disc temperature is higher than the highest brake disc temperature made of the traditional material and the temperature difference between the highest brake disc temperature and the highest brake disc temperature is larger than a preset difference, and repeating the step of simulating and calculating the temperature field cloud chart corresponding to the geometric model based on the analysis step;
and the second processing module is used for constructing a brake disc temperature field line graph corresponding to the geometric model based on the temperature field cloud graph when the maximum temperature of the brake disc is higher than the maximum temperature of the traditional material brake disc, and the temperature difference between the maximum temperature of the traditional material brake disc and the maximum temperature of the brake disc is not larger than a preset difference, or the maximum temperature of the brake disc is not higher than the maximum temperature of the traditional material brake disc.
In one possible implementation, the determining module 202 includes:
the building unit is used for building a three-dimensional coordinate system based on the geometric model so as to enable the Z direction of the three-dimensional coordinate system to be perpendicular to the brake disc surface of the geometric model;
the first determining unit is used for determining a reference point at a disc center corresponding to a brake disc bolt hole in the geometric model and applying first constraint forces in the X direction and the Y direction to the reference point at the disc center respectively;
the second determining unit is used for determining a first position corresponding to a brake disc cap in the geometric model, and applying a second constraint force in the Z direction to the inner ring surface of the brake disc cap so as to constrain the linear displacement of the brake disc along the axial direction;
and a third determining unit, configured to determine a second position corresponding to a brake pad in the geometric model, and apply a third restraining force in the X direction and the Y direction to the brake pad, respectively.
In one embodiment, the apparatus further comprises:
the second acquisition module is used for determining the maximum simulation temperature stress of the brake disc according to the temperature field cloud picture and acquiring the allowable stress of the composite material;
the second comparison module is used for comparing the maximum simulation temperature stress and the allowable stress of the brake disc;
a third processing module, configured to, when the maximum brake disk simulation temperature stress is greater than the allowable stress, adjust the material parameter based on the maximum brake disk temperature, and repeat the step of calculating the temperature field cloud map corresponding to the geometric model based on the analysis step simulation;
and the fourth processing module is used for constructing a brake disc temperature stress line graph corresponding to the geometric model based on the temperature field cloud graph when the maximum brake disc simulation temperature stress is not greater than the allowable stress.
It is clear to a person skilled in the art that the solution according to the embodiments of the present application can be implemented by means of software and/or hardware. The "unit" and "module" in this specification refer to software and/or hardware that can perform a specific function independently or in cooperation with other components, where the hardware may be, for example, a Field-Programmable Gate Array (FPGA), an Integrated Circuit (IC), or the like.
Each processing unit and/or module in the embodiments of the present application may be implemented by an analog circuit that implements the functions described in the embodiments of the present application, or may be implemented by software that executes the functions described in the embodiments of the present application.
Referring to fig. 3, a schematic structural diagram of an electronic device according to an embodiment of the present application is shown, where the electronic device may be used to implement the method in the embodiment shown in fig. 1. As shown in fig. 3, the electronic device 300 may include: at least one central processor 301, at least one network interface 304, a user interface 303, a memory 305, at least one communication bus 302.
Wherein a communication bus 302 is used to enable the connection communication between these components.
The user interface 303 may include a Display screen (Display) and a Camera (Camera), and the optional user interface 303 may further include a standard wired interface and a wireless interface.
The network interface 304 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
The central processor 301 may include one or more processing cores. The central processor 301 connects various parts within the entire electronic device 300 using various interfaces and lines, and performs various functions of the terminal 300 and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 305 and calling data stored in the memory 305. Alternatively, the central Processing unit 301 may be implemented in at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The CPU 301 may integrate one or a combination of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. Wherein, the CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the display screen; the modem is used to handle wireless communications. It is understood that the modem may not be integrated into the cpu 301, but may be implemented by a single chip.
The Memory 305 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 305 includes a non-transitory computer-readable medium. The memory 305 may be used to store instructions, programs, code sets, or instruction sets. The memory 305 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, and the like; the storage data area may store data and the like referred to in the above respective method embodiments. The memory 305 may alternatively be at least one storage device located remotely from the central processor 301. As shown in fig. 3, memory 305, which is a type of computer storage medium, may include an operating system, a network communication module, a user interface module, and program instructions.
In the electronic device 300 shown in fig. 3, the user interface 303 is mainly used for providing an input interface for a user to obtain data input by the user; the cpu 301 may be configured to call the temperature field simulation application program of the composite material automobile brake disc stored in the memory 305, and specifically perform the following operations:
importing a geometric model of a brake disc, and setting material parameters of the geometric model based on the composite material property of the brake disc;
determining analysis steps of the geometric model, and setting boundary conditions and initial conditions for each analysis step respectively;
and simulating and calculating a temperature field cloud picture corresponding to the geometric model based on the analysis step.
The present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described method. The computer-readable storage medium may include, but is not limited to, any type of disk including floppy disks, optical disks, DVD, CD-ROMs, microdrive, and magneto-optical disks, ROMs, RAMs, EPROMs, EEPROMs, DRAMs, VRAMs, flash memory devices, magnetic or optical cards, nanosystems (including molecular memory ICs), or any type of media or device suitable for storing instructions and/or data.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one type of division of logical functions, and there may be other divisions when actually implementing, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some service interfaces, devices or units, and may be an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be substantially implemented or a part of or all or part of the technical solution contributing to the prior art may be embodied in the form of a software product stored in a memory, and including several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned memory comprises: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by a program, which is stored in a computer-readable memory, and the memory may include: flash disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.
The above description is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure should not be limited thereby. That is, all equivalent changes and modifications made in accordance with the teachings of the present disclosure are intended to be included within the scope of the present disclosure. Embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A temperature field simulation method for a composite material automobile brake disc is characterized by comprising the following steps:
importing a geometric model of a brake disc, and setting material parameters of the geometric model based on the composite material property of the brake disc;
determining analysis steps of the geometric model, and setting boundary conditions and initial conditions for each analysis step respectively;
and simulating and calculating a temperature field cloud picture corresponding to the geometric model based on the analysis step.
2. The method of claim 1, wherein the importing the geometric model of the brake rotor is preceded by:
determining the geometric dimension of the brake disc, and constructing a geometric model of the brake disc based on the geometric dimension.
3. The method of claim 1, wherein the material parameters include density, modulus of elasticity, poisson's ratio, coefficient of thermal expansion, thermal conductivity, specific heat capacity.
4. The method of claim 1, wherein before calculating the temperature field cloud corresponding to the geometric model based on the analyzing step simulation, further comprising:
and performing local seed distribution on all edges of the geometric model based on a preset size, and dividing unit meshes on the geometric model.
5. The method of claim 1, wherein after calculating the temperature field cloud corresponding to the geometric model based on the analyzing step simulation, further comprising:
obtaining the highest temperature of a brake disc made of a traditional material, and determining the highest temperature of the brake disc according to the temperature field cloud picture;
comparing the highest temperature of the brake disc made of the traditional material with the highest temperature of the brake disc;
when the highest temperature of the brake disc is higher than that of the brake disc made of the traditional material, and the temperature difference between the highest temperature of the brake disc made of the traditional material and the highest temperature of the brake disc is larger than a preset difference, adjusting the material parameters based on the highest temperature of the brake disc, and repeating the step of simulating and calculating the temperature field cloud chart corresponding to the geometric model based on the analysis step;
and when the highest temperature of the brake disc is higher than the highest temperature of the brake disc made of the traditional material, and the temperature difference between the highest temperature of the brake disc made of the traditional material and the highest temperature of the brake disc is not larger than a preset difference, or the highest temperature of the brake disc is not higher than the highest temperature of the brake disc made of the traditional material, constructing a brake disc temperature field line graph corresponding to the geometric model based on the temperature field cloud graph.
6. The method of claim 1, wherein after determining the analysis steps of the geometric model and setting the boundary condition and the initial condition for each of the analysis steps, respectively, further comprising:
constructing a three-dimensional coordinate system based on the geometric model so as to enable the Z direction of the three-dimensional coordinate system to be perpendicular to the brake disc surface of the geometric model;
determining a center reference point corresponding to a brake disc bolt hole in the geometric model, and applying first constraint forces in the X direction and the Y direction to the center reference point respectively;
determining a first position corresponding to a brake disc cap in the geometric model, and applying a second constraint force in the Z direction to the inner ring surface of the brake disc cap to constrain the linear displacement of the brake disc along the axial direction;
and determining a second position corresponding to the brake block in the geometric model, and applying third constraint forces in the X direction and the Y direction to the brake block respectively.
7. The method of claim 6, wherein after calculating the temperature field cloud corresponding to the geometric model based on the analyzing step simulation, further comprising:
determining the maximum simulation temperature stress of the brake disc according to the temperature field cloud chart, and acquiring the allowable stress of the composite material;
comparing the maximum brake disc simulation temperature stress with the allowable stress;
when the maximum simulation temperature stress of the brake disc is larger than the allowable stress, adjusting the material parameters based on the maximum temperature of the brake disc, and repeating the step of simulating and calculating the temperature field cloud chart corresponding to the geometric model based on the analysis step;
and when the maximum simulation temperature stress of the brake disc is not larger than the allowable stress, constructing a brake disc temperature stress line graph corresponding to the geometric model based on the temperature field cloud graph.
8. A temperature field simulation apparatus for a composite automotive brake disc, the apparatus comprising:
the system comprises an importing module, a calculating module and a calculating module, wherein the importing module is used for importing a geometric model of a brake disc and setting material parameters of the geometric model based on composite material properties of the brake disc;
the determining module is used for determining the analysis steps of the geometric model and respectively setting boundary conditions and initial conditions for each analysis step;
and the calculation module is used for simulating and calculating the temperature field cloud picture corresponding to the geometric model based on the analysis step.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1-7 are implemented when the computer program is executed by the processor.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111413545.1A CN114239132B (en) | 2021-11-25 | 2021-11-25 | Temperature field simulation method and device for composite automobile brake disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111413545.1A CN114239132B (en) | 2021-11-25 | 2021-11-25 | Temperature field simulation method and device for composite automobile brake disc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114239132A true CN114239132A (en) | 2022-03-25 |
| CN114239132B CN114239132B (en) | 2024-06-18 |
Family
ID=80751173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111413545.1A Active CN114239132B (en) | 2021-11-25 | 2021-11-25 | Temperature field simulation method and device for composite automobile brake disc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114239132B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109858116A (en) * | 2019-01-18 | 2019-06-07 | 重庆菲斯塔新能源汽车科技有限公司 | A kind of composite material automobile bonnet structure numerical simulation method based on ABAQUS |
| CN110765685A (en) * | 2019-10-18 | 2020-02-07 | 南方电网科学研究院有限责任公司 | Simulation method and device for multi-physical-field coupling of reactor and storage medium |
| CN110795898A (en) * | 2019-10-18 | 2020-02-14 | 南方电网科学研究院有限责任公司 | Simulation method and device for coupling of multiple physical fields of wall bushing and storage medium |
| CN113051802A (en) * | 2021-04-02 | 2021-06-29 | 东风汽车集团股份有限公司 | Friction plate optimization method based on contact pressure of friction plate and brake disc |
| CN113343351A (en) * | 2021-05-18 | 2021-09-03 | 重庆长安汽车股份有限公司 | Thermal-structure coupling analysis method for automobile brake disc |
-
2021
- 2021-11-25 CN CN202111413545.1A patent/CN114239132B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109858116A (en) * | 2019-01-18 | 2019-06-07 | 重庆菲斯塔新能源汽车科技有限公司 | A kind of composite material automobile bonnet structure numerical simulation method based on ABAQUS |
| CN110765685A (en) * | 2019-10-18 | 2020-02-07 | 南方电网科学研究院有限责任公司 | Simulation method and device for multi-physical-field coupling of reactor and storage medium |
| CN110795898A (en) * | 2019-10-18 | 2020-02-14 | 南方电网科学研究院有限责任公司 | Simulation method and device for coupling of multiple physical fields of wall bushing and storage medium |
| CN113051802A (en) * | 2021-04-02 | 2021-06-29 | 东风汽车集团股份有限公司 | Friction plate optimization method based on contact pressure of friction plate and brake disc |
| CN113343351A (en) * | 2021-05-18 | 2021-09-03 | 重庆长安汽车股份有限公司 | Thermal-structure coupling analysis method for automobile brake disc |
Non-Patent Citations (1)
| Title |
|---|
| 王开;刘昌明;杨勇;: "制动盘材料构成设计过程热应力分析", 重庆大学学报, no. 12, 15 December 2008 (2008-12-15), pages 1346 - 1350 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114239132B (en) | 2024-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103440357B (en) | Virtual reality roaming scence generates method and system | |
| JP2022506345A (en) | Dot product calculator and its calculation method | |
| CN111930742B (en) | Building information model BIM-based data storage method and related device | |
| WO2021244677A1 (en) | Method and device for optimization of tire model | |
| CN113470092B (en) | Terrain rendering method and device, electronic equipment and storage medium | |
| CN104267940A (en) | Quick map tile generation method based on CPU+GPU | |
| CN112861374A (en) | Multi-physical coupling simulation processing method, device and equipment based on pre-controller | |
| CN111814376A (en) | Method for extracting rigidity result of vehicle body attachment point and electronic equipment | |
| CN110310361B (en) | Real-time transmission method, storage medium, equipment and system for building model | |
| CN110709891A (en) | Virtual reality scene model establishing method and device, electronic equipment and storage medium | |
| CN114239132A (en) | Temperature field simulation method and device for composite material automobile brake disc | |
| CN112245932B (en) | Game resource processing method and device and server device | |
| US8024158B2 (en) | Management system and management method of CAD data used for a structural analysis | |
| CN113609237A (en) | Data processing method, device, equipment and medium for construction land change | |
| CN105631135A (en) | Rapid modeling analysis system based on ABAQUS foundation pit excavation and application system thereof | |
| CN117455895A (en) | Preparation device and preparation method for realizing wire clamp | |
| CN112612427A (en) | Vehicle stop data processing method and device, storage medium and terminal | |
| CN109684656B (en) | Assembly constraint inheritance method based on SolidWorks | |
| CN107393019B (en) | Particle-based cloth simulation method and device | |
| JP4467823B2 (en) | Design support apparatus, design support method, and design support program | |
| CN113535499A (en) | Multi-type concurrent memory access flow verification method supporting multi-core shared access | |
| CN108595455B (en) | Spatial data coordinate conversion method and device | |
| JP2005165606A (en) | Device and method for producing cad data | |
| CN118551631A (en) | Wind turbine generator test platform load rapid simulation model modeling method and system | |
| US11763046B2 (en) | Techniques for automatically selecting simulation tools for and performing related simulations on computer-generated designs |
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 | ||
| CB02 | Change of applicant information |
Address after: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Applicant after: United New Energy Automobile Co.,Ltd. Address before: 314500 988 Tong Tong Road, Wu Tong Street, Tongxiang, Jiaxing, Zhejiang Applicant before: Hozon New Energy Automobile Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |