CN116561900B - Lightweight automobile interior space topology optimization method - Google Patents
Lightweight automobile interior space topology optimization method Download PDFInfo
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- CN116561900B CN116561900B CN202310820604.XA CN202310820604A CN116561900B CN 116561900 B CN116561900 B CN 116561900B CN 202310820604 A CN202310820604 A CN 202310820604A CN 116561900 B CN116561900 B CN 116561900B
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- 238000005192 partition Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
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Abstract
The invention belongs to the technical field of automobile space optimization, and discloses a lightweight automobile space topology optimization method, which comprises the following steps: establishing a carriage three-dimensional space structure by utilizing three-dimensional modeling software according to the shape and size parameters of the automobile, and determining a topology optimization space of the space in the automobile; determining an assembly part installed in an automobile, and generating a menu to be assembled; carrying out importance degree assignment on each assembly part in the menu to be assembled; each assembly part is arranged in a three-dimensional space structure of a carriage, a residual space value Tjz in the carriage and an integral actual weight value Zlz of the carriage are calculated, and a balance coefficient PHxs is calculated through formulation analysis; judging whether to optimize the space in the carriage or not according to the size of the balance coefficient PHxs, if so, taking the automobile stress part as an endpoint, equally dividing the area formed by sequentially connecting the endpoints into equal parts of y, and adjusting the weight and the residual space of each subarea in the equal parts.
Description
Technical Field
The invention belongs to the technical field of automobile space optimization, and particularly relates to a lightweight automobile interior space topology optimization method.
Background
The topology optimization (topology optimization) is to build a base structure composed of a limited number of units in a design space according to given load conditions, constraint conditions and performance indexes, then determine the stay of the units in the design space according to an algorithm, optimize the stay by the shape, materials and the like of assembly components, and form a final topology scheme by the reserved units, so that the topology optimization is realized, and the optimal distribution scheme is found in the design space in an automobile through the topology optimization.
When a new energy automobile design manufacturer is used for increasing the endurance mileage of an automobile, a lightweight automobile design is adopted, the weight is lightened, the corresponding reduction of the internal space of the automobile is brought, the topology optimization of the internal space of the automobile is needed, the riding comfort of the automobile is guaranteed, the topology optimization of the existing internal space of the automobile is realized, the aim of lightening the weight of the automobile is fulfilled by directly locally lightening the weight of a certain assembly component, or the volume of the certain assembly component in the automobile is directly reduced, the weight is lightened, the topology optimization method can lead the total weight of the automobile and the internal space of the automobile to be unevenly distributed after the assembly of the automobile in the later period is finished, thereby influencing the service life of stressed components of the automobile and the comfort level of riding the automobile by members, and the stressed components such as wheels or other connecting components used for connecting carriages and wheels are inconsistent in the abrasion degree when the stressed parts are uneven, and the stability in the running process of the automobile is reduced.
In view of the above, the invention provides a lightweight method for optimizing the space topology in an automobile.
Disclosure of Invention
The invention aims to solve the technical problems and provides a lightweight method for optimizing the space topology in an automobile.
The technical scheme of the invention is as follows: a method for optimizing a lightweight automotive interior space topology, the method comprising the steps of:
firstly, establishing a carriage three-dimensional space structure by utilizing three-dimensional modeling software according to automobile shape and size parameters, and determining a topology optimization space of an automobile interior space;
step two, determining an assembly part installed in the automobile and generating a menu to be assembled;
step three, matching n manufacturing materials with each assembly part in the menu to be assembled, wherein n is an integer greater than 1;
step four, carrying out importance degree assignment on each assembly part in the menu to be assembled, wherein the greater the importance degree assignment value is, the more important the assembly part shows the function;
step five, recording information of each assembly part in a menu to be assembled, wherein the assembly part information comprises the volume, the material and the weight corresponding to the material assembly part of the assembly part;
step six, installing each assembly part in a three-dimensional space structure of a carriage, calculating a residual space value Tjz in the carriage and an integral actual weight value Zlz of the carriage, and calculating to obtain a balance coefficient PHxs through formulation analysis;
and seventhly, judging whether the space in the carriage is optimized according to the size of the balance coefficient PHxs, if so, taking the automobile stress part as an endpoint, and the number of the endpoints is more than or equal to three, dividing the area formed by sequentially connecting the endpoints into equal parts of y, and adjusting the weight and the residual space of each subarea in the equal part area.
Preferably, in the above, the balance coefficient PHxs is compared with the balance threshold PHmin and PHmax for analysis;
if PHmin < PHxs < PHmax, the space in the carriage is not optimized;
if PHxs is less than or equal to PHmin or PHxs is more than or equal to PHmax, optimizing the carriage.
Preferably, in the foregoing, the number of the automobile stress parts is 4, the automobile stress parts are first end points and second end points of mounting areas of steering wheels at the front part of the automobile, then the rearmost two-wheel mounting areas at the tail part of the automobile are third end points and fourth end points, and an area formed by surrounding the first end points, the second end points, the third end points and the fourth end points is divided into y equal-divided areas; y=4.
Preferably, in the foregoing, the specific method for adjusting the weight of each partition in the step seven includes: comparing the absolute value Xmz of the difference between the overall actual weight value Zlz of the carriage and the standard weight value Mbz of the carriage with the weight error value Mwx;
if Xmz is less than or equal to Mwx, the whole weight of the carriage is not optimized;
if Xmz > Mwx, calculate each partition weight value M according to the formula: mbz/4=fmbz, mwx/4=fmwx, wherein Fmbz is the weight standard value of each equal division area in the carriage, fmwx is the weight error value of each equal division area in the carriage, and the materials of the part assembly parts of the 4 equal division areas are replaced until Fmbz-M < Fmwx, and the optimization is completed.
Preferably, in the above, the material replacement sequence of the assembly parts replaces the corresponding material of the assembly parts in the order of increasing importance assignment, and when the material replacement principle is adopted, the material is replaced by the material with heavy weight.
Preferably, in the above, the specific method for adjusting the remaining space of each partition in the cabin in the step seven includes: calculating a residual space value K of each subarea, comparing the absolute value Txz of the difference between the residual space value Tjz in the carriage and the standard space value Tbz of the carriage with a space error value Twz, and if Txz is less than or equal to Twz, not optimizing the residual space of the carriage;
if Txz > Twz, the remaining space value M of each partition is calculated according to the formula: tbz/4=ftbz, twz/4=ftwz, ftbz is a standard value of the residual space of each equal division area in the carriage, ftwz is a residual space error value of each equal division area in the carriage, and the volume of the part assembly parts of the 4 equal division areas is reduced until Ftbz-K < Fmwx, and the optimization is completed.
Preferably, in the above, the assembly part volume replacement sequence is: and (3) reducing the volume of the corresponding assembly parts in the descending order of the volumes of the assembly parts and the ascending order of the importance assignment of the assembly parts.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention relates to a lightweight automobile internal space topology optimization method, which takes an automobile front steering wheel installation area as a first endpoint and a second endpoint, and takes an automobile tail rear end two-wheel installation area as a third endpoint and a fourth endpoint, and the area formed by surrounding the first endpoint, the second endpoint, the third endpoint and the fourth endpoint is divided into 4 equal-divided areas, so that when the automobile internal space is lightweight and optimized, the weight in the divided areas is optimized simultaneously, the overall weight distribution of an automobile is more uniform and symmetrical, and after the automobile is assembled in the later period, the pressure born by each wheel is within a compression error unit, the overall balance degree of the automobile is improved, and the stability in the running process of the automobile is ensured;
the rest space in the equal-to-area areas is optimized simultaneously, so that the overall space distribution in the automobile is more symmetrical, passengers are ensured to have proper movable spaces in any area of the automobile, and the overall riding comfort of the passengers in the automobile is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a method for optimizing the spatial topology in a lightweight automobile according to an embodiment of the invention;
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
As shown in fig. 1, the method for optimizing space topology in a lightweight automobile according to the embodiment includes:
establishing a carriage three-dimensional space structure by utilizing three-dimensional modeling software according to the shape and size parameters of the automobile, and determining a topology optimization space of the space in the automobile;
the method comprises the steps of determining the internal installation assembly parts of an automobile, generating a menu to be assembled, and freely increasing or decreasing related assembly parts by an optimizing person according to an automobile design scheme;
each assembly part in the menu to be assembled is matched with n manufacturing materials, wherein n is an integer greater than 1;
and carrying out importance degree assignment on each assembly part in the menu to be assembled, wherein the greater the importance degree assignment value is, the more important the assembly part shows that the function is embodied, for example, the automobile seat framework assignment is larger than that of an automobile seat heating part, and when the weight after the assembly is overweight, the assembly part with smaller assignment is replaced with materials or deleted.
And recording information of each assembly part in the menu to be assembled, wherein the information of the assembly part comprises the volume, the material and the weight corresponding to the material assembly part of the assembly part.
Installing each assembly part in a carriage three-dimensional space structure, calculating a carriage residual space value Tjz and a carriage integral actual weight value Zlz, and calculating to obtain a balance coefficient PHxs through PHxs=alpha 1 xTjz+alpha 2 xZlz, wherein alpha 1 and alpha 2 are both proportional coefficients, and alpha 1> alpha 2>0; it should be noted that, the balance coefficient is a value reflecting the suitability of the space in the automobile, the larger the value is, the larger the space in the automobile is, and the heavier the weight is, otherwise, the larger or smaller the value is, the driving comfort of the driver is affected; comparing and analyzing the balance coefficient with a balance threshold PHmin and PHmax;
if PHmin < PHxs < PHmax, the space in the carriage is not optimized;
if PHxs is less than or equal to PHmin or PHxs is more than or equal to PHmax, optimizing the interior of the carriage, comparing the absolute value Xmz of the difference value of the carriage integral actual weight value Zlz and the carriage standard weight value Mbz with the weight error value Mwx, and if Xmz is less than or equal to Mwx, not optimizing the carriage integral weight;
if Xmz > Mwx, dividing the interior of the carriage into 4 equal division areas, calculating the weight value M of each division area, and according to the formula: mbz/4=fmbz, mwx/4=fmwx, wherein Fmbz is a weight standard value of 4 equal division areas in the carriage, fmwx is a weight error value of 4 equal division areas in the carriage, and the materials of the part assembly parts of the 4 equal division areas are replaced until Fmbz-M < Fmwx, and the optimization is completed.
The above-mentioned assembly material replacement sequence is to the replacement of corresponding assembly material with the order that importance degree assignment is increasing, and during the material replacement principle, from the heavy material replacement to light material.
The 4 equally divided areas are formed by taking the mounting area of the steering wheel at the front part of the automobile as a first end point and a second end point, taking the mounting area of the two wheels at the rearmost end of the tail part of the automobile as a third end point and a fourth end point, dividing the area formed by surrounding the first end point, the second end point, the third end point and the fourth end point into 4 equally divided areas, and simultaneously optimizing the weight in the divided areas when the space in the automobile is optimized in a light manner, so that the overall weight distribution of the automobile is more uniform and symmetrical, the pressure received by each wheel is within a compression error unit after the assembly of the automobile at the later stage, the overall balance degree of the automobile is improved, and the stability of the automobile in the running process is ensured.
Calculating a residual space value K of each subarea, comparing the absolute value Txz of the difference between the residual space value Tjz in the carriage and the standard space value Tbz of the carriage with a space error value Twz, and if Txz is less than or equal to Twz, not optimizing the residual space of the carriage;
if Txz > Twz, dividing the interior of the carriage into 4 equal division areas, calculating the residual space value M of each division area, and according to the formula: tbz/4=ftbz, twz/4=ftwz, ftbz is a standard value of the residual space of each equal division area in the carriage, ftwz is a residual space error value of each equal division area in the carriage, and the volume of the part assembly parts of the 4 equal division areas is reduced until Ftbz-K < Fmwx, and the optimization is completed.
The volume replacement sequence of the assembly parts is as follows: and (3) reducing the volume of the corresponding assembly parts in the descending order of the volumes of the assembly parts and the ascending order of the importance assignment of the assembly parts, namely preferentially reducing the volumes of the assembly parts with larger volumes and smaller importance assignment.
When the space in the automobile is optimized in a light mode, the rest spaces in the equal areas are optimized simultaneously, so that the overall space distribution in the automobile is more symmetrical, passengers in any area in the automobile are guaranteed to have proper movable spaces, and the overall riding comfort level of the passengers in the automobile is improved.
The formulas are all formulas obtained by collecting a large amount of data for software simulation and selecting a formula close to a true value, and coefficients in the formulas are set by a person skilled in the art according to actual conditions.
Such as: formula phxs=a1tjz+a2zlz; collecting automobile design parameter sample data by a person skilled in the art and setting a corresponding scaling factor for each group of sample data; substituting the set coefficients and the acquired parameter sample data into formulas, forming a binary one-time equation set by any two formulas, screening the calculated coefficients, and taking an average value to obtain alpha 1 and alpha 2.
The size of the coefficient is a specific numerical value obtained by quantizing each parameter, so that the subsequent comparison is convenient, and the size of the coefficient depends on the number of sample data and the corresponding proportional coefficient is preliminarily set for each group of sample data by a person skilled in the art; as long as the proportional relation between the parameter and the quantized value is not affected.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean 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 preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (5)
1. A method for optimizing space topology in a lightweight automotive vehicle, the method comprising the steps of:
firstly, establishing a carriage three-dimensional space structure by utilizing three-dimensional modeling software according to automobile shape and size parameters, and determining a topology optimization space of an automobile interior space;
step two, determining an assembly part installed in the automobile and generating a menu to be assembled;
step three, matching n manufacturing materials with each assembly part in the menu to be assembled, wherein n is an integer greater than 1;
step four, carrying out importance degree assignment on each assembly part in the menu to be assembled, wherein the greater the importance degree assignment value is, the more important the assembly part shows the function;
step five, recording information of each assembly part in a menu to be assembled, wherein the assembly part information comprises the volume, the material and the weight corresponding to the material assembly part of the assembly part;
step six, installing each assembly part in a three-dimensional space structure of a carriage, calculating a residual space value Tjz in the carriage and an integral actual weight value Zlz of the carriage, and calculating to obtain a balance coefficient PHxs through formulation analysis;
step seven, judging whether to optimize the space in the carriage according to the size of the balance coefficient PHxs, if so, taking the automobile stress part as the end points, wherein the number of the end points is more than or equal to three, dividing the area formed by sequentially connecting the end points into equal parts of y, and adjusting the weight and the residual space of each subarea in the equal part area;
the specific method for adjusting the weight of each partition in the seventh step comprises the following steps: comparing the absolute value Xmz of the difference between the overall actual weight value Zlz of the carriage and the standard weight value Mbz of the carriage with the weight error value Mwx;
if Xmz is less than or equal to Mwx, the whole weight of the carriage is not optimized;
if Xmz > Mwx, calculate each partition weight value M according to the formula: mbz/4=Fmbz, mwx/4=Fbx, wherein Fmbz is the weight standard value of each equal division area in the carriage, fbx is the weight error value of each equal division area in the carriage, and the materials of the part assembly parts of the 4 equal division areas are replaced until Fmbz-M < Fbx, and the optimization is completed;
and the material replacement sequence of the assembly parts replaces the corresponding material of the assembly parts in the sequence of increasing importance assignment, and when the material is replaced according to the material replacement principle, the material with heavy weight is replaced by the material with light weight.
2. The method for optimizing the spatial topology in a lightweight automobile according to claim 1, wherein the balance coefficient PHxs is compared with a balance threshold PHmin and PHmax for analysis;
if PHmin < PHxs < PHmax, the space in the carriage is not optimized;
if PHxs is less than or equal to PHmin or PHxs is more than or equal to PHmax, optimizing the carriage.
3. The method for optimizing the space topology in the lightweight automobile according to claim 2, wherein the number of the automobile stress parts is 4, the automobile stress parts are a first end point and a second end point, the two wheel installation areas at the rearmost end of the tail part of the automobile are a third end point and a fourth end point, and the area formed by surrounding the first end point, the second end point, the third end point and the fourth end point is divided into y equally divided areas; y=4.
4. The method for optimizing the space topology in a lightweight automobile according to claim 1, wherein the specific method for adjusting the remaining space of each subarea in the compartment in the step seven comprises the following steps: calculating a residual space value K of each subarea, comparing the absolute value Txz of the difference between the residual space value Tjz in the carriage and the standard space value Tbz of the carriage with a space error value Twz, and if Txz is less than or equal to Twz, not optimizing the residual space of the carriage;
if Txz > Twz, the remaining space value M of each partition is calculated according to the formula: tbz/4=ftbz, twz/4=ftwz, ftbz is a standard value of the residual space of each equal division area in the carriage, ftwz is a residual space error value of each equal division area in the carriage, and the volume of the part assembly parts of the 4 equal division areas is reduced until Ftbz-K < Fmwx, and the optimization is completed.
5. The method for optimizing the spatial topology in a lightweight automotive vehicle according to claim 4, wherein the order of volume replacement of the assembled parts is: and (3) reducing the volume of the corresponding assembly parts in the descending order of the volumes of the assembly parts and the ascending order of the importance assignment of the assembly parts.
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| CN112507445A (en) * | 2020-11-02 | 2021-03-16 | 天津市沃田金属实业股份有限公司 | Geometrical structure reconstruction method of topological optimization result |
| CN112528391A (en) * | 2020-11-02 | 2021-03-19 | 天津市沃田金属实业股份有限公司 | Topological optimization method for space in lightweight new energy automobile |
| CN113361038A (en) * | 2021-06-16 | 2021-09-07 | 株洲中车时代电气股份有限公司 | Converter lightweight method, system, server and computer readable storage medium |
| CN116090178A (en) * | 2022-12-06 | 2023-05-09 | 合肥巨一动力系统有限公司 | Design method and system for lightweight structure of speed reducer shell |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112507445A (en) * | 2020-11-02 | 2021-03-16 | 天津市沃田金属实业股份有限公司 | Geometrical structure reconstruction method of topological optimization result |
| CN112528391A (en) * | 2020-11-02 | 2021-03-19 | 天津市沃田金属实业股份有限公司 | Topological optimization method for space in lightweight new energy automobile |
| CN113361038A (en) * | 2021-06-16 | 2021-09-07 | 株洲中车时代电气股份有限公司 | Converter lightweight method, system, server and computer readable storage medium |
| CN116090178A (en) * | 2022-12-06 | 2023-05-09 | 合肥巨一动力系统有限公司 | Design method and system for lightweight structure of speed reducer shell |
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