CN116502340B - Thermal boundary data processing method, system, computer and readable storage medium - Google Patents
Thermal boundary data processing method, system, computer and readable storage medium Download PDFInfo
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Abstract
The invention provides a thermal boundary data processing method, a thermal boundary data processing system, a computer and a readable storage medium, wherein the method comprises the following steps: constructing a three-dimensional thermal simulation model of the brake disc based on a preset program, and creating a local rotating column coordinate system based on the three-dimensional thermal simulation model of the brake disc; identifying a friction area and a non-friction area in the three-dimensional thermal simulation model of the brake disc through a local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time in the friction area, heat radiation data generated in real time in the non-friction area and convection heat exchange data of the three-dimensional thermal simulation model of the brake disc; and respectively converting the friction surface thermal power, the thermal radiation data and the convection heat transfer data into corresponding heat flux data so as to judge whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not according to the heat flux data. Through the mode, the processing amount of data can be greatly reduced, and meanwhile, whether the actual brake disc is qualified or not can be judged.
Description
Technical Field
The present invention relates to the field of automotive technologies, and in particular, to a method, a system, a computer, and a readable storage medium for processing thermal boundary data.
Background
Along with the progress of science and technology and the rapid development of productivity, automobiles are popularized in daily life of people, and become one of the indispensable transportation means for daily travel of people, so that the lives of people are greatly facilitated.
In the braking process of the existing automobile, the friction plate is tightly pressed against the disc surface of the brake disc to generate corresponding friction force, so that the braking of the automobile is completed. In the process, a large amount of heat is generated due to the intense friction between the friction plate and the brake disc, so that the temperature of the brake disc gradually rises, and a corresponding three-dimensional model is required to be constructed for thermal simulation transient calculation analysis before the automobile leaves the factory so as to know the change condition of the temperature of the brake disc with time.
In the prior art, a corresponding solid domain model is established for a brake disc and a friction plate respectively, three types of thermal boundary data are simultaneously arranged on the disc surface of the brake disc, namely friction thermal power data, heat convection heat exchange data, and heat radiation data, wherein transient simulation calculation is required, and the brake disc is dynamically rotated, so that the surface, which is in contact with the friction plate, of the disc surface is updated and changed continuously along with time, the heat radiation needs to be updated and iterated, namely the calculation of the radiation angle coefficients of the outer surface is updated sequentially in each time iterated step, the iterative calculation of the angle coefficients of each time step is time-consuming, the whole calculation amount is time-consuming and labor-consuming, and the production efficiency of an automobile is reduced.
Disclosure of Invention
Based on this, the present invention aims to provide a thermal boundary data processing method, a thermal boundary data processing system, a thermal boundary data processing computer and a thermal boundary data processing readable storage medium, so as to solve the problem that the overall calculation amount in the prior art is time-consuming and labor-consuming, resulting in reduction of the production efficiency of an automobile.
An embodiment of the present invention provides a thermal boundary data processing method, where the method includes:
constructing a three-dimensional thermal simulation model of a brake disc based on a preset program, and creating a local rotating column coordinate system based on the three-dimensional thermal simulation model of the brake disc, wherein the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc;
identifying a friction area and a non-friction area in the three-dimensional thermal simulation model of the brake disc through the local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time in the friction area, thermal radiation data generated in real time in the non-friction area and convection heat exchange data of the three-dimensional thermal simulation model of the brake disc;
and respectively converting the friction surface thermal power, the heat radiation data and the convection heat transfer data into corresponding heat flux data so as to judge whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not according to the heat flux data.
The beneficial effects of the invention are as follows: constructing a three-dimensional thermal simulation model of a brake disc based on a preset program, and creating a local rotating column coordinate system based on the three-dimensional thermal simulation model of the brake disc, wherein the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc; further, identifying a friction area and a non-friction area in the three-dimensional thermal simulation model of the brake disc through the local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time by the three-dimensional thermal simulation model of the brake disc in the friction area, thermal radiation data generated in real time in the non-friction area and convection heat exchange data; and finally, only the friction surface thermal power, the heat radiation data and the convection heat transfer data are respectively converted into corresponding heat flux data, so that whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not is judged through the heat flux data. Through the mode, three kinds of data needed in the simulation process can be effectively converted into one kind of data to be processed, so that the processing capacity of the data can be greatly reduced, and meanwhile, whether the actual brake disc is qualified or not can be accurately judged according to the simulation result, so that the research and development efficiency of the automobile is greatly improved, and the use experience of a user on the automobile is correspondingly improved.
Preferably, the step of identifying the friction area and the non-friction area in the three-dimensional thermal simulation model of the brake disc through the local rotation column coordinate system based on a preset rule includes:
creating a brake block matched with the three-dimensional thermal simulation model of the brake disc, and detecting a contact contour between the brake block and the three-dimensional thermal simulation model of the brake disc;
randomly generating the local rotating column coordinate system in the contact contour, and detecting a superposition area surrounded by the contact contour through the local rotating column coordinate system;
the overlapping region is set as the friction region, and a region other than the overlapping region is set as the non-friction region.
Preferably, the step of modeling the friction surface power generated in real time by the three-dimensional thermal simulation model of the brake disc in the friction area, and the heat radiation data and the convection heat exchange data generated in real time in the non-friction area comprises the following steps:
reversely rotating the local rotating column coordinate system around the circle center of the three-dimensional thermal simulation model of the brake disc, and collecting real-time position coordinates respectively generated by the local rotating column coordinate system at different moments in the rotation process, wherein the real-time position coordinates correspond to the coordinates of the friction area, the range of the real-time position coordinates is between 0 and 2 pi, and the radius r of the area corresponding to the friction area is smaller than or equal to r (theta);
And acquiring friction surface power generated by the friction area at different positions in real time according to the real-time position coordinates based on a preset neural network model, and heat radiation data and convection heat exchange data generated by the non-friction area at different positions respectively.
Preferably, the step of converting the friction surface thermal power, the thermal radiation data and the convective heat transfer data into corresponding heat flux data respectively includes:
constructing corresponding grid lines on the disc surface of the three-dimensional thermal simulation model of the brake disc, and detecting the superposition grid number between the grid lines and the friction area;
calculating the friction area corresponding to the friction area according to the superposition grid number, and calculating first heat flux data corresponding to the friction area according to the friction surface thermal power and the friction area based on a first preset algorithm, wherein the expression of the first preset algorithm is as follows:
S1=Q/A
wherein S1 represents the first heat flux data, Q represents the friction surface thermal power, and a represents the friction area.
Preferably, the step of converting the friction surface thermal power, the thermal radiation data and the convective heat transfer data into corresponding heat flux data respectively includes:
Acquiring first temperature data generated in real time in the non-friction area, and acquiring second temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
calculating a target difference value between the first temperature data and the second temperature data, and calculating second heat flux data corresponding to the non-friction area according to the target difference value and the convection heat transfer data based on a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
S2=（T1－T2）*HTC
wherein S2 represents the second heat flux data, T1 represents the first temperature data, T2 represents the second temperature data, and HTC represents the convective heat transfer data.
Preferably, the step of converting the friction surface thermal power, the thermal radiation data and the convective heat transfer data into corresponding heat flux data respectively includes:
acquiring third temperature data generated in real time in the non-friction area, and acquiring fourth temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
based on a third preset algorithm, calculating third heat flux data corresponding to the non-friction area according to the heat radiation data, the third temperature data and the fourth temperature data, wherein the expression of the third preset algorithm is as follows:
S3=εσ（T3 4 －T4 4 ）
Wherein ε represents a heat radiation constant, σ represents a blackbody radiation constant, S3 represents the third heat flux data, T3 represents the third temperature data, and T4 represents the fourth temperature data.
Preferably, the method further comprises:
generating a corresponding simulation report according to the heat flux data, and establishing wireless communication connection with a display terminal;
extracting simulation parameters contained in the simulation report, and preprocessing the simulation parameters;
and converting the preprocessed analog parameters into corresponding display signals, and transmitting the display signals to the display terminal in real time so as to display the analog parameters in the display terminal in real time.
A second aspect of an embodiment of the present invention proposes a thermal boundary data processing system, the system comprising:
the simulation module is used for constructing a three-dimensional thermal simulation model of the brake disc based on a preset program, and creating a local rotating column coordinate system based on the three-dimensional thermal simulation model of the brake disc, wherein the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc;
the simulation module is used for identifying a friction area and a non-friction area in the three-dimensional thermal simulation model of the brake disc through the local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time in the friction area, thermal radiation data generated in real time in the non-friction area and convection heat exchange data of the three-dimensional thermal simulation model of the brake disc;
And the conversion module is used for respectively converting the friction surface thermal power, the heat radiation data and the convection heat transfer data into corresponding heat flux data so as to judge whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not according to the heat flux data.
In the above thermal boundary data processing system, the simulation module is specifically configured to:
creating a brake block matched with the three-dimensional thermal simulation model of the brake disc, and detecting a contact contour between the brake block and the three-dimensional thermal simulation model of the brake disc;
randomly generating the local rotating column coordinate system in the contact contour, and detecting a superposition area surrounded by the contact contour through the local rotating column coordinate system;
the overlapping region is set as the friction region, and a region other than the overlapping region is set as the non-friction region.
In the above thermal boundary data processing system, the simulation module is specifically configured to:
reversely rotating the local rotating column coordinate system around the circle center of the three-dimensional thermal simulation model of the brake disc, and collecting real-time position coordinates respectively generated by the local rotating column coordinate system at different moments in the rotation process, wherein the real-time position coordinates correspond to the coordinates of the friction area, the range of the real-time position coordinates is between 0 and 2 pi, and the radius r of the area corresponding to the friction area is smaller than or equal to r (theta);
And acquiring friction surface power generated by the friction area at different positions in real time according to the real-time position coordinates based on a preset neural network model, and heat radiation data and convection heat exchange data generated by the non-friction area at different positions respectively.
In the above thermal boundary data processing system, the conversion module is specifically configured to:
constructing corresponding grid lines on the disc surface of the three-dimensional thermal simulation model of the brake disc, and detecting the superposition grid number between the grid lines and the friction area;
calculating the friction area corresponding to the friction area according to the superposition grid number, and calculating first heat flux data corresponding to the friction area according to the friction surface thermal power and the friction area based on a first preset algorithm, wherein the expression of the first preset algorithm is as follows:
S1=Q/A
wherein S1 represents the first heat flux data, Q represents the friction surface thermal power, and a represents the friction area.
In the above thermal boundary data processing system, the conversion module is specifically configured to:
acquiring first temperature data generated in real time in the non-friction area, and acquiring second temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
Calculating a target difference value between the first temperature data and the second temperature data, and calculating second heat flux data corresponding to the non-friction area according to the target difference value and the convection heat transfer data based on a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
S2=（T1－T2）*HTC
wherein S2 represents the second heat flux data, T1 represents the first temperature data, T2 represents the second temperature data, and HTC represents the convective heat transfer data.
In the above thermal boundary data processing system, the conversion module is specifically configured to:
acquiring third temperature data generated in real time in the non-friction area, and acquiring fourth temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
based on a third preset algorithm, calculating third heat flux data corresponding to the non-friction area according to the heat radiation data, the third temperature data and the fourth temperature data, wherein the expression of the third preset algorithm is as follows:
S3=εσ（T3 4 －T4 4 ）
wherein ε represents a heat radiation constant, σ represents a blackbody radiation constant, S3 represents the third heat flux data, T3 represents the third temperature data, and T4 represents the fourth temperature data.
In the above thermal boundary data processing system, the thermal boundary data processing system further includes a display module, where the display module is specifically configured to:
generating a corresponding simulation report according to the heat flux data, and establishing wireless communication connection with a display terminal;
extracting simulation parameters contained in the simulation report, and preprocessing the simulation parameters;
and converting the preprocessed analog parameters into corresponding display signals, and transmitting the display signals to the display terminal in real time so as to display the analog parameters in the display terminal in real time.
A third aspect of an embodiment of the present invention proposes a computer comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the thermal boundary data processing method as described above when executing the computer program.
A fourth aspect of the embodiments of the present invention proposes a readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements a hot boundary data processing method as described above.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flowchart of a thermal boundary data processing method according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of an infrared thermal simulation three-dimensional model of a brake disc in a thermal boundary data processing method according to a second embodiment of the present invention;
FIG. 3 is a block diagram of a thermal boundary data processing system according to a third embodiment of the present invention.
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a thermal boundary data processing method according to a first embodiment of the present invention is shown, where the thermal boundary data processing method according to the present embodiment can greatly reduce the processing amount of data, and can accurately determine whether an actual brake disc is qualified according to a simulation result, so that the development efficiency of an automobile is greatly improved, and the use experience of a user on the automobile is correspondingly improved.
Specifically, the method for processing thermal boundary data provided in this embodiment specifically includes the following steps:
step S10, a three-dimensional thermal simulation model of a brake disc is built based on a preset program, and a local rotating column coordinate system is built based on the three-dimensional thermal simulation model of the brake disc, wherein the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc;
Specifically, in this embodiment, it should be first described that the method for processing thermal boundary data provided in this embodiment is mainly used for processing thermal boundary data of various types of brake discs, specifically, the thermal boundary data of the brake disc is specifically generated at an edge and a surface of a disc surface of the brake disc, and can accurately reflect physical parameters of the brake disc in an actual working state, so that in a developing process, the brake disc is optimized through the physical parameters, and thus developing efficiency of the brake disc can be correspondingly improved.
In addition, in the present embodiment, it should be noted that the three-dimensional thermal simulation model of the brake disc provided in the present embodiment is implemented based on existing three-dimensional software, and preferably, the three-dimensional software may be three-dimensional software such as ug and solidworks, which are all within the protection scope of the present embodiment.
In this step, it should be noted that, in this step, a three-dimensional thermal simulation model of the brake disc with the same size as the actual brake disc is first constructed by the three-dimensional software, and therefore, in order to accurately identify the friction area 10 on the current three-dimensional thermal simulation model of the brake disc, a required local spin column coordinate system needs to be further created in the three-dimensional thermal simulation model of the brake disc, and specifically, the local spin column coordinate system provided in this embodiment can be rotated relative to the center of the current three-dimensional thermal simulation model of the brake disc.
Step S20, identifying a friction area 10 and a non-friction area 20 in the three-dimensional thermal simulation model of the brake disc through the local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time in the friction area 10, heat radiation data generated in real time in the non-friction area 20 and convection heat exchange data of the three-dimensional thermal simulation model of the brake disc;
further, in this step, in order to accurately identify the friction area 10 and the non-friction area 20 in the current three-dimensional thermal simulation model of the brake disc in real time, the friction area 10 and the non-friction area 20 are identified according to preset rules, and at the same time, the friction surface power generated in the friction area 10 in real time by the current three-dimensional thermal simulation model of the brake disc, the heat radiation data and the convective heat exchange data generated in real time by the non-friction area 20 can be correspondingly simulated.
It should be noted that, in the present embodiment, the friction area 10 and the non-friction area 20 provided are relatively dynamically changed, that is, the contact surface between the brake disc and the brake pad is dynamically changed during the operation process, but the area between the friction area 10 and the non-friction area 20 is relatively fixed, that is, the area of the two areas is not changed.
And step S30, respectively converting the friction surface thermal power, the heat radiation data and the convection heat transfer data into corresponding heat flux data, so as to judge whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not according to the heat flux data.
Finally, in this step, after the required friction surface thermal power, thermal radiation data and convective heat transfer data are obtained through the above steps, in order to facilitate data processing, this step further converts the above friction surface thermal power, thermal radiation data and convective heat transfer data into required heat flux data, respectively, and on this basis, it is able to accurately determine whether the actual brake disc corresponding to the current three-dimensional thermal simulation model of the brake disc is qualified through the heat flux data.
Specifically, the heat flux data provided in this embodiment is provided with a corresponding data threshold, if the calculated heat flux data is within the data threshold, the corresponding judgment is qualified, and if the calculated heat flux data is outside the data threshold, the corresponding judgment is unqualified. More specifically, the embodiment can quickly simulate the optimized heat flux data into the temperature field corresponding to the three-dimensional heat simulation model of the current brake disc, and further can accurately judge whether the braking thermal performance of the corresponding actual brake disc meets the requirement according to the temperature field.
When the three-dimensional thermal simulation model is used, a three-dimensional thermal simulation model of the brake disc is built based on a preset program, and a local rotating column coordinate system is built based on the three-dimensional thermal simulation model of the brake disc, and the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc; further, identifying a friction area 10 and a non-friction area 20 in the three-dimensional thermal simulation model of the brake disc through the local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time in the friction area 10, heat radiation data generated in real time in the non-friction area 20 and convection heat exchange data of the three-dimensional thermal simulation model of the brake disc; and finally, only the friction surface thermal power, the heat radiation data and the convection heat transfer data are respectively converted into corresponding heat flux data, so that whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not is judged through the heat flux data. Through the mode, three kinds of data needed in the simulation process can be effectively converted into one kind of data to be processed, so that the processing capacity of the data can be greatly reduced, and meanwhile, whether the actual brake disc is qualified or not can be accurately judged according to the simulation result, so that the research and development efficiency of the automobile is greatly improved, and the use experience of a user on the automobile is correspondingly improved.
It should be noted that the foregoing implementation procedure is only for illustrating the feasibility of the present application, but this does not represent that the thermal boundary data processing method of the present application is only one implementation procedure, and may be incorporated into the feasible implementation of the thermal boundary data processing method of the present application, as long as it can be implemented.
In summary, the thermal boundary data processing method provided by the embodiment of the application can greatly reduce the processing amount of data, and can accurately judge whether the actual brake disc is qualified according to the simulation result, thereby greatly improving the research and development efficiency of the automobile and correspondingly improving the use experience of the user on the automobile.
Referring to fig. 2, a second embodiment of the present application also provides a thermal boundary data processing method, which is different from the thermal boundary data processing method provided in the first embodiment in that:
specifically, in this embodiment, the step of identifying the friction area 10 and the non-friction area 20 in the three-dimensional thermal simulation model of the brake disc through the local spin column coordinate system based on the preset rule includes:
Creating a brake block matched with the three-dimensional thermal simulation model of the brake disc, and detecting a contact contour between the brake block and the three-dimensional thermal simulation model of the brake disc;
randomly generating the local rotating column coordinate system in the contact contour, and detecting a superposition area surrounded by the contact contour through the local rotating column coordinate system;
the overlapping region is set as the friction region 10, and a region other than the overlapping region is set as the non-friction region 20.
In particular, in this embodiment, it should be noted that, in the actual running process of the vehicle, the brake disc needs to be used together with the brake pad, so as to implement braking of the vehicle, and the area of the brake pad is far smaller than that of the brake disc. Based on the above, the embodiment further creates the brake pad adapted to the three-dimensional thermal simulation model of the current brake disc through the three-dimensional software, and at the same time, correspondingly detects the contact profile between the current brake pad and the three-dimensional thermal simulation model of the current brake disc.
Further, in order to accurately identify the required friction area 10, the present embodiment further randomly generates the local rotation column coordinate system in the contact profile, that is, the origin of coordinates of the local rotation column coordinate system is randomly generated in the area surrounded by the contact profile. Based on the above, the overlapping area surrounded by the current contact contour can be further detected through the local rotating column coordinate system, and the overlapping area is the contact surface between the current three-dimensional thermal simulation model of the brake disc and the current brake block. In addition, the friction region 10 that is required to be the current overlapping region can be set, and the region other than the overlapping region can be set as the non-friction region 20.
Further, in this embodiment, the step of modeling the friction surface power generated in real time in the friction area 10 by the three-dimensional thermal simulation model of the brake disc, and the heat radiation data and the convective heat exchange data generated in real time in the non-friction area 20 includes:
reversely rotating the local rotating column coordinate system around the circle center of the three-dimensional thermal simulation model of the brake disc, and collecting real-time position coordinates respectively generated by the local rotating column coordinate system at different moments in the rotation process, wherein the real-time position coordinates correspond to the coordinates of the friction area 10, the range of the real-time position coordinates is between 0 and 2 pi, and the radius r of the area corresponding to the friction area is smaller than or equal to r (theta);
and acquiring friction surface power generated by the friction area 10 at different positions in real time according to the real-time position coordinates based on a preset neural network model, and heat radiation data and convection heat exchange data generated by the non-friction area 20 at different positions respectively.
Further, in this embodiment, it should be noted that, after the local rotation column coordinate system is obtained through the above steps, based on this, the present embodiment further performs reverse rotation, that is, counterclockwise rotation, on the current local rotation column coordinate system around the center of the current three-dimensional thermal simulation model of the brake disc, and at the same time, collects real-time position coordinates generated by the current local rotation column coordinate system at different moments in the rotation process, where the real-time position coordinates specifically correspond to the coordinates of the friction area 10, and the range of the real-time position coordinates is between 0 and 2 pi, and the area radius r corresponding to the friction area is less than or equal to r (θ).
Furthermore, the friction surface power generated at different positions in the friction area 10, the heat radiation data and the convective heat exchange data generated at different positions in the non-friction area 20 are further collected according to the current real-time position coordinates by a preset neural network model.
In this embodiment, the step of converting the friction surface thermal power, the thermal radiation data, and the convective heat transfer data into corresponding heat flux data includes:
constructing corresponding grid lines on the disc surface of the three-dimensional thermal simulation model of the brake disc, and detecting the superposition grid number between the grid lines and the friction area 10;
calculating a friction area corresponding to the friction area 10 according to the superposition grid number, and calculating first heat flux data corresponding to the friction area 10 according to the friction surface thermal power and the friction area based on a first preset algorithm, wherein the expression of the first preset algorithm is as follows:
S1=Q/A
wherein S1 represents the first heat flux data, Q represents the friction surface thermal power, and a represents the friction area. Wherein, it should be noted that the unit of the first heat flux data is w/m 2 And contains specific numerical values.
In addition, in this embodiment, in order to accurately calculate the friction area corresponding to the friction area 10, the present embodiment further constructs corresponding grid patterns on the disc surface of the three-dimensional thermal simulation model of the brake disc, that is, the current grid patterns may completely cover the disc surface of the three-dimensional thermal simulation model of the current brake disc. Further, the number of overlapping meshes between the current mesh pattern and the friction area 10 is correspondingly detected.
It should be noted that, since the area of each mesh is fixed, the friction area of the friction area 10 can be calculated correspondingly according to the number of overlapping meshes. Based on this, the first heat flux data corresponding to the friction region 10 can be calculated from the friction surface heat power and the friction area by the first preset algorithm.
In this embodiment, the step of converting the friction surface thermal power, the thermal radiation data, and the convective heat transfer data into corresponding heat flux data includes:
acquiring first temperature data generated in real time in the non-friction area 20, and acquiring second temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
Calculating a target difference value between the first temperature data and the second temperature data, and calculating second heat flux data corresponding to the non-friction area 20 according to the target difference value and the convective heat transfer data based on a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
S2=（T1－T2）*HTC
wherein S2 represents the second heat flux data, T1 represents the first temperature data, T2 represents the second temperature data, and HTC represents the convective heat transfer data. Wherein, it is noted that the unit of the second heat flux data is w/m 2 And include specific values.
In addition, in the present embodiment, it is also described that the braking of the vehicle can be achieved because a large friction force is generated in the process of contacting the brake disc and the brake pad, however, a large amount of heat is generated in the process, so that the temperature of the brake disc is correspondingly raised. Based on this, in this embodiment, the first temperature data generated in real time in the non-friction area 20 is correspondingly acquired, and at the same time, the second temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc is synchronously acquired, where the temperature value corresponding to the first temperature data is significantly greater than the temperature value corresponding to the second temperature data.
Further, in this embodiment, the target difference between the current first temperature data and the current second temperature data is further calculated, and the second heat flux data corresponding to the current non-friction area 20 is further calculated according to the current target difference and the convective heat transfer data by a second preset algorithm, where the first heat flux data and the second heat flux data have the same attribute.
In this embodiment, it should be noted that the step of converting the friction surface thermal power, the thermal radiation data, and the convective heat transfer data into corresponding heat flux data includes:
acquiring third temperature data generated in real time in the non-friction area 20, and acquiring fourth temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
calculating third heat flux data corresponding to the non-friction area 20 according to the heat radiation data, the third temperature data and the fourth temperature data based on a third preset algorithm, wherein the expression of the third preset algorithm is as follows:
S3=εσ（T3 4 －T4 4 ）
wherein ε represents a heat radiation constant, σ represents a blackbody radiation constant, S3 represents the third heat flux data, T3 represents the third temperature data, and T4 represents the fourth temperature data. Wherein, it should be noted that the unit of the third heat flux data is w/m 2 And include specific values.
In this embodiment, it should be noted that, similarly, the present embodiment further obtains third temperature data generated in real time in the non-friction area 20, and synchronously obtains fourth temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc. Specifically, the third temperature data and the fourth temperature data provided in the present embodiment may be the same as or different from the first temperature data and the second temperature data, which are both within the protection scope of the present embodiment. Specifically, the present embodiment provides two acquisition modes, one is synchronous acquisition and the other is distributed acquisition, where when synchronous acquisition is used, the first temperature data, the second temperature data, the third temperature data and the fourth temperature data are acquired simultaneously in the process of rotating the local rotation column coordinate system in this embodiment, so that the first temperature data and the third temperature data at this time are the same, and the second temperature data and the fourth temperature data are the same.
Correspondingly, when the distributed acquisition is used, the first temperature data, the second temperature data, the third temperature data and the fourth temperature data are acquired separately in the rotating process of the local rotating column coordinate system, so that the first temperature data and the third temperature data at the moment are different, the second temperature data and the fourth temperature data are different, different data acquisition requirements can be met by adopting the two modes to acquire more accurate heat flux data, and the processing effect of the data is correspondingly improved.
Based on this, third heat flux data corresponding to the non-friction area 20 is further calculated by a third preset algorithm according to the current third temperature data, the fourth temperature data and the heat radiation data, specifically, the third heat flux data has the same attribute as the first heat flux data and the second heat flux data.
Further, in this embodiment, after the required first heat flux data, second heat flux data, and third heat flux data are obtained respectively, the first heat flux data is further applied to the friction area, and the second heat flux data and the third heat flux data are applied to the non-friction area, where in this process, it is only required to determine whether the θ value of the coordinate corresponding to the stay area of the local rotation column coordinate system is less than or equal to 2Ω, and whether the radius of the corresponding area is less than r (θ), specifically, if yes, the stay area of the local rotation column coordinate system is the friction area, and if yes, the stay area of the local rotation column coordinate system is the non-friction area.
In this embodiment, it should be noted that, the method further includes:
Generating a corresponding simulation report according to the heat flux data, and establishing wireless communication connection with a display terminal;
extracting simulation parameters contained in the simulation report, and preprocessing the simulation parameters;
and converting the preprocessed analog parameters into corresponding display signals, and transmitting the display signals to the display terminal in real time so as to display the analog parameters in the display terminal in real time.
In this embodiment, it should be noted that, in order to enable a worker to obtain a simulation result in real time, the embodiment further extracts the heat flux data and generates a corresponding simulation report according to the heat flux data, and at the same time, establishes a wireless communication connection with a display terminal, preferably, the display terminal may be a display or a computer.
Furthermore, the simulation parameters contained in the current simulation report are extracted, filtering and noise reduction processing are immediately carried out on the simulation parameters, and further, the processed simulation parameters are converted into corresponding display signals, and based on the display signals, the display signals are only required to be transmitted into the display terminal in real time, so that the required simulation parameters can be accurately displayed in the display terminal in real time for reference of staff.
It should be noted that, for the sake of brevity, the method according to the second embodiment of the present invention, which implements the same principle and some of the technical effects as the first embodiment, is not mentioned here, and reference is made to the corresponding content provided by the first embodiment.
In summary, the thermal boundary data processing method provided by the embodiment of the invention can greatly reduce the processing amount of data, and can accurately judge whether the actual brake disc is qualified according to the simulation result, thereby greatly improving the research and development efficiency of the automobile and correspondingly improving the use experience of the user on the automobile.
Referring now to FIG. 3, a third embodiment of a thermal boundary data processing system according to the present invention is shown, the system comprising:
the simulation module 12 is used for constructing a three-dimensional thermal simulation model of the brake disc based on a preset program, and creating a local rotating column coordinate system based on the three-dimensional thermal simulation model of the brake disc, wherein the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc;
the simulation module 22 is configured to identify a friction area 10 and a non-friction area 20 in the three-dimensional thermal simulation model of the brake disc through the local rotation column coordinate system based on a preset rule, and simulate a friction surface thermal power generated in real time by the three-dimensional thermal simulation model of the brake disc in the friction area 10, and heat radiation data and convection heat exchange data generated in real time in the non-friction area 20;
And the conversion module 32 is configured to convert the friction surface thermal power, the thermal radiation data and the convective heat transfer data into corresponding heat flux data respectively, so as to determine whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified according to the heat flux data.
In the above thermal boundary data processing system, the simulation module 22 is specifically configured to:
creating a brake block matched with the three-dimensional thermal simulation model of the brake disc, and detecting a contact contour between the brake block and the three-dimensional thermal simulation model of the brake disc;
randomly generating the local rotating column coordinate system in the contact contour, and detecting a superposition area surrounded by the contact contour through the local rotating column coordinate system;
the overlapping region is set as the friction region 10, and a region other than the overlapping region is set as the non-friction region 20.
In the above thermal boundary data processing system, the simulation module 22 is specifically configured to:
reversely rotating the local rotating column coordinate system around the circle center of the three-dimensional thermal simulation model of the brake disc, and collecting real-time position coordinates respectively generated by the local rotating column coordinate system at different moments in the rotation process, wherein the real-time position coordinates correspond to the coordinates of the friction area 10, the range of the real-time position coordinates is between 0 and 2 pi, and the radius r of the area corresponding to the friction area is smaller than or equal to r (theta);
And acquiring friction surface power generated by the friction area 10 at different positions in real time according to the real-time position coordinates based on a preset neural network model, and heat radiation data and convection heat exchange data generated by the non-friction area 20 at different positions respectively.
In the above thermal boundary data processing system, the conversion module 32 is specifically configured to:
constructing corresponding grid lines on the disc surface of the three-dimensional thermal simulation model of the brake disc, and detecting the superposition grid number between the grid lines and the friction area 10;
calculating a friction area corresponding to the friction area 10 according to the superposition grid number, and calculating first heat flux data corresponding to the friction area 10 according to the friction surface thermal power and the friction area based on a first preset algorithm, wherein the expression of the first preset algorithm is as follows:
S1=Q/A
wherein S1 represents the first heat flux data, Q represents the friction surface thermal power, and a represents the friction area.
In the above thermal boundary data processing system, the conversion module 32 is specifically configured to:
acquiring first temperature data generated in real time in the non-friction area 20, and acquiring second temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
Calculating a target difference value between the first temperature data and the second temperature data, and calculating second heat flux data corresponding to the non-friction area 20 according to the target difference value and the convective heat transfer data based on a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
S2=（T1－T2）*HTC
wherein S2 represents the second heat flux data, T1 represents the first temperature data, T2 represents the second temperature data, and HTC represents the convective heat transfer data.
In the above thermal boundary data processing system, the conversion module 32 is specifically configured to:
acquiring third temperature data generated in real time in the non-friction area 20, and acquiring fourth temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
calculating third heat flux data corresponding to the non-friction area 20 according to the heat radiation data, the third temperature data and the fourth temperature data based on a third preset algorithm, wherein the expression of the third preset algorithm is as follows:
S3=εσ（T3 4 －T4 4 ）
wherein ε represents a heat radiation constant, σ represents a blackbody radiation constant, S3 represents the third heat flux data, T3 represents the third temperature data, and T4 represents the fourth temperature data.
In the above thermal boundary data processing system, the thermal boundary data processing system further includes a display module 42, where the display module 42 is specifically configured to:
generating a corresponding simulation report according to the heat flux data, and establishing wireless communication connection with a display terminal;
extracting simulation parameters contained in the simulation report, and preprocessing the simulation parameters;
and converting the preprocessed analog parameters into corresponding display signals, and transmitting the display signals to the display terminal in real time so as to display the analog parameters in the display terminal in real time.
A fourth embodiment of the present invention provides a computer including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the thermal boundary data processing method provided in the above embodiments when executing the computer program.
A fifth embodiment of the present invention provides a readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements the thermal boundary data processing method provided by the above embodiments.
In summary, the thermal boundary data processing method, the thermal boundary data processing system, the thermal boundary data processing computer and the readable storage medium provided by the embodiment of the invention can greatly reduce the processing amount of data, and can accurately judge whether the actual brake disc is qualified according to the simulation result, so that the research and development efficiency of the automobile is greatly improved, and the use experience of a user on the automobile is correspondingly improved.
The above-described respective modules may be functional modules or program modules, and may be implemented by software or hardware. For modules implemented in hardware, the various modules described above may be located in the same processor; or the above modules may be located in different processors in any combination.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (7)
1. A method of thermal boundary data processing, the method comprising:
Constructing a three-dimensional thermal simulation model of a brake disc based on a preset program, and creating a local rotating column coordinate system based on the three-dimensional thermal simulation model of the brake disc, wherein the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc;
identifying a friction area and a non-friction area in the three-dimensional thermal simulation model of the brake disc through the local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time in the friction area, thermal radiation data generated in real time in the non-friction area and convection heat exchange data of the three-dimensional thermal simulation model of the brake disc;
respectively converting the friction surface thermal power, the thermal radiation data and the convection heat transfer data into corresponding heat flux data so as to judge whether an actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not according to the heat flux data;
the step of identifying the friction area and the non-friction area in the three-dimensional thermal simulation model of the brake disc through the local rotating cylinder coordinate system based on the preset rule comprises the following steps:
creating a brake block matched with the three-dimensional thermal simulation model of the brake disc, and detecting a contact contour between the brake block and the three-dimensional thermal simulation model of the brake disc;
Randomly generating the local rotating column coordinate system in the contact contour, and detecting a superposition area surrounded by the contact contour through the local rotating column coordinate system;
setting the overlapping region as the friction region, and setting a region other than the overlapping region as the non-friction region;
the step of simulating the friction surface power generated in real time in the friction area by the three-dimensional thermal simulation model of the brake disc, and the heat radiation data and the convection heat exchange data generated in real time in the non-friction area comprises the following steps:
reversely rotating the local rotating column coordinate system around the circle center of the three-dimensional thermal simulation model of the brake disc, and collecting real-time position coordinates respectively generated by the local rotating column coordinate system at different moments in the rotation process, wherein the real-time position coordinates correspond to the coordinates of the friction area, the range of the real-time position coordinates is between 0 and 2 pi, and the radius r of the area corresponding to the friction area is smaller than or equal to r (theta);
acquiring friction surface power generated by the friction area at different positions in real time according to the real-time position coordinates based on a preset neural network model, and heat radiation data and convection heat exchange data generated by the non-friction area at different positions respectively;
The step of converting the friction surface thermal power, the heat radiation data and the convective heat transfer data into corresponding heat flux data respectively includes:
constructing corresponding grid lines on the disc surface of the three-dimensional thermal simulation model of the brake disc, and detecting the superposition grid number between the grid lines and the friction area;
calculating the friction area corresponding to the friction area according to the superposition grid number, and calculating first heat flux data corresponding to the friction area according to the friction surface thermal power and the friction area based on a first preset algorithm, wherein the expression of the first preset algorithm is as follows:
S1=Q/A
wherein S1 represents the first heat flux data, Q represents the friction surface thermal power, and a represents the friction area.
2. The thermal boundary data processing method according to claim 1, wherein: the step of converting the friction surface thermal power, the heat radiation data and the convective heat transfer data into corresponding heat flux data respectively includes:
acquiring first temperature data generated in real time in the non-friction area, and acquiring second temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
Calculating a target difference value between the first temperature data and the second temperature data, and calculating second heat flux data corresponding to the non-friction area according to the target difference value and the convection heat transfer data based on a second preset algorithm, wherein the expression of the second preset algorithm is as follows:
S2=（T1－T2）*HTC
wherein S2 represents the second heat flux data, T1 represents the first temperature data, T2 represents the second temperature data, and HTC represents the convective heat transfer data.
3. The thermal boundary data processing method according to claim 1, wherein: the step of converting the friction surface thermal power, the heat radiation data and the convective heat transfer data into corresponding heat flux data respectively includes:
acquiring third temperature data generated in real time in the non-friction area, and acquiring fourth temperature data corresponding to the surrounding environment of the three-dimensional thermal simulation model of the brake disc;
based on a third preset algorithm, calculating third heat flux data corresponding to the non-friction area according to the heat radiation data, the third temperature data and the fourth temperature data, wherein the expression of the third preset algorithm is as follows:
S3=εσ（T3 4 －T4 4 ）
Wherein ε represents a heat radiation constant, σ represents a blackbody radiation constant, S3 represents the third heat flux data, T3 represents the third temperature data, and T4 represents the fourth temperature data.
4. The thermal boundary data processing method according to claim 1, wherein: the method further comprises the steps of:
generating a corresponding simulation report according to the heat flux data, and establishing wireless communication connection with a display terminal;
extracting simulation parameters contained in the simulation report, and preprocessing the simulation parameters;
and converting the preprocessed analog parameters into corresponding display signals, and transmitting the display signals to the display terminal in real time so as to display the analog parameters in the display terminal in real time.
5. A thermal boundary data processing system for implementing a thermal boundary data processing method according to any one of claims 1-4, the system comprising:
the simulation module is used for constructing a three-dimensional thermal simulation model of the brake disc based on a preset program, and creating a local rotating column coordinate system based on the three-dimensional thermal simulation model of the brake disc, wherein the local rotating column coordinate system rotates relative to the three-dimensional thermal simulation model of the brake disc;
The simulation module is used for identifying a friction area and a non-friction area in the three-dimensional thermal simulation model of the brake disc through the local rotating column coordinate system based on a preset rule, and simulating friction surface thermal power generated in real time in the friction area, thermal radiation data generated in real time in the non-friction area and convection heat exchange data of the three-dimensional thermal simulation model of the brake disc;
and the conversion module is used for respectively converting the friction surface thermal power, the heat radiation data and the convection heat transfer data into corresponding heat flux data so as to judge whether the actual brake disc corresponding to the three-dimensional thermal simulation model of the brake disc is qualified or not according to the heat flux data.
6. A computer comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the thermal boundary data processing method of any one of claims 1 to 4 when the computer program is executed.
7. A readable storage medium having stored thereon a computer program, which when executed by a processor implements the thermal boundary data processing method according to any one of claims 1 to 4.
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