Passenger car body lightweight evaluation method and device, terminal and storage medium

Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a passenger car body lightweight evaluation method and device, a terminal and a storage medium. Comprising the following steps: calculating a relation L between vehicle body torsion performance and weight; calculating the vehicle body density rho; according to a statistical method, the relation between the torsion performance and the weight of the vehicle body and the density of the vehicle body are quantified into fractions L1 and rho1 according to a linear equation; a parameter Y (X) for evaluating weight reduction is calculated by a weighted summation method. According to the method, through evaluation, the light weight comparison condition of the automobile body in competitive products of the same level can be known, and an automobile manufacturer can be guided to reasonably and scientifically control the optimization degree of the weight of the automobile body.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically a method, device, terminal, and storage medium for evaluating the lightweighting of passenger vehicle bodies. Background Technology

[0002] With the development of the automotive industry, vehicle lightweighting has become an important means to improve fuel economy and reduce emissions. For example, a reference patent CN110254569A proposes a method for evaluating the lightweighting technology level of passenger vehicles. This method assesses the lightweighting technology level of a vehicle model by calculating a lightweighting coefficient (L) to guide companies in setting reasonable lightweighting targets. While this method considers fuel economy and power performance, it does not fully account for the differences in lightweighting assessment between models of different price points and class, thus limiting the comparability of evaluation results across different models. Based on the above analysis, existing technologies lack a method for scientifically evaluating the lightweighting of vehicle bodies for models of different price points and class, and in particular, it cannot effectively guide automakers in the scientific management of vehicle body weight optimization. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a method, device, terminal, and storage medium for evaluating the lightweighting of passenger vehicle bodies. Through evaluation, it is possible to understand the lightweighting comparison of the vehicle body with competing products in the same class, and to guide automakers in making reasonable and scientific control over the degree of optimization of vehicle body weight.

[0004] The technical solution of this invention is described below in conjunction with the accompanying drawings: In a first aspect, embodiments of the present invention provide a method for evaluating the lightweighting of passenger vehicle bodies, including: Calculate the relationship between vehicle body torsional performance and weight (L); Calculate the vehicle body density ρ; According to statistical methods, the relationship between vehicle body torsional performance and weight and vehicle body density is quantified into fractions L1 and ρ1 by linear equations. The parameter Y(X) for evaluating lightweighting is calculated using a weighted summation method.

[0005] Furthermore, the specific method for calculating the relationship between the vehicle body's torsional performance and weight is as follows: L = M / (CT×A); In the formula, M is the vehicle weight; CT is the torsional stiffness of the vehicle frame; and A is the projected area of ​​the front and rear suspension fixing points.

[0006] Furthermore, the specific method for calculating the vehicle body density is as follows: ρ=M / V; In the formula, ρ is the vehicle body density; M is the vehicle body weight; and V is the vehicle body volume.

[0007] Furthermore, the vehicle body volume V includes the body volume V1 of a three-box passenger car and the body volume V2 of a two-box passenger car; The body volume of the three-box passenger vehicle is V1 = {0.5 × (body length - wheelbase) + wheelbase} × body width × body height; the body volume of the two-box passenger vehicle is V2 = {0.665 × (body length - wheelbase) + wheelbase} × body width × body height.

[0008] Furthermore, the specific method for quantifying the engineering values ​​of each evaluation factor into scores using a linear equation based on statistical methods is as follows: When the relationship between vehicle body torsional performance and weight is rounded to 2-6, the score L1 is 10-6 points respectively. The vehicle body density ρ, after rounding, is between 30 and 39, and the score ρ1 is 10-1 points respectively.

[0009] Furthermore, the specific method for calculating the parameter Y(X) for evaluating lightweighting using a weighted summation method is as follows: Y(X) = aX1 + bX2; Where X1 = 10 - (L1 - 2) / (6 - 2) * (10 - 6); X2=10-(ρ1-30) / (39-30)*(10-1); a and b are the correlation coefficients.

[0010] Furthermore, for models priced between 50,000 and 100,000 yuan, a is 60% and b is 40%; for models priced below 50,000 yuan, a is 25% and b is 75%; for models priced between 100,000 and 200,000 yuan, a is 70% and b is 30%; and for models priced above 200,000 yuan, a is 80% and b is 20%.

[0011] Secondly, embodiments of the present invention also provide a passenger vehicle body lightweighting evaluation device, comprising: The first calculation module is used to calculate the relationship L between the vehicle body's torsional performance and its weight. The second calculation module is used to calculate the vehicle body density ρ; The third calculation module is used to quantify the relationship between the vehicle body torsional performance and weight and the vehicle body density into fractions L1 and ρ1 according to the linear first equation based on statistical methods. The fourth calculation module is used to calculate the parameter Y(X) for evaluating lightweighting using a weighted summation method.

[0012] Thirdly, a terminal is provided, including: One or more processors; Memory for storing the one or more processor-executable instructions; Wherein, the one or more processors are configured as follows: Perform the method described in the first aspect of the embodiments of the present invention.

[0013] Fourthly, a non-transitory computer-readable storage medium is provided, wherein when instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to perform the method described in the first aspect of the present invention.

[0014] Fifthly, an application product is provided, which, when running on a terminal, causes the terminal to execute the method described in the first aspect of the present invention.

[0015] The beneficial effects of this invention are as follows: 1) This invention addresses the deficiency in the prior art of lacking a unified definition and evaluation method for vehicle body lightweighting; 2) This invention standardizes, rationalizes, and makes transparent the evaluation method for vehicle body lightweighting by collecting, analyzing, and calculating relevant data from different vehicle models. It provides guidance for vehicle lightweighting and facilitates manufacturers' control over vehicle body lightweighting. 3) This invention also realizes the transformation from experience-based manual evaluation to data-driven objective evaluation, thereby improving the scientific nature of lightweight decision-making; 4) When conducting lightweight assessments, this invention can take into account different price points and vehicle classes, and can guide automakers to reasonably and scientifically control the degree of vehicle weight optimization. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating the passenger vehicle body lightweighting evaluation method described in this invention. Figure 2 This is a schematic diagram illustrating the relationship between the torsional performance and weight of the vehicle body according to the present invention; Figure 3 This is a schematic diagram of the structure of the passenger vehicle body lightweight evaluation device described in this invention; Figure 4 This is a schematic block diagram of a terminal structure. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Example 1 See Figure 1 This embodiment provides a method for evaluating the lightweighting of passenger vehicle bodies. This method can be executed by a passenger vehicle body lightweighting evaluation device according to this embodiment of the invention. The device can be implemented in software and / or hardware. The specific method is as follows: See Figure 2 Step 1: Calculate the relationship L between the vehicle body's torsional performance and its weight, as follows: L = M / (CT×A); In the formula, M is the vehicle weight; CT is the torsional stiffness of the vehicle frame; and A is the projected area of ​​the front and rear suspension fixing points.

[0021] As shown in the formula above, L is determined by the vehicle's weight, torsional stiffness, and the projected area of ​​the front and rear suspension mounting points. For example, to calculate L for a car priced between 50,000 and 100,000 yuan, see the table below: Model <![CDATA[Projected area A / m 2 > Vehicle weight (M / Kg) <![CDATA[Torsion performance CT / NM (°) -1 > Relationship between vehicle body torsional performance and weight L1 Model 1 4.14 285 21445 3.2 Model 2 4.07 309.8 21575 3.53 Model 3 3.65 271.7 15631 4.8 Model 4 3.92 292.4 13508 5.53 Model 5 4.44 298 23628 2.84 As can be seen from the values ​​in the table above, a smaller L value does not necessarily mean a smaller vehicle mass; conversely, a larger L value does not necessarily mean a larger vehicle mass.

[0022] Step 2: Calculate the vehicle body density ρ, as follows: ρ=M / V; In the formula, ρ is the vehicle body density; M is the vehicle body weight; and V is the vehicle body volume.

[0023] The vehicle body volume V includes the body volume V1 of a three-box passenger car and the body volume V2 of a two-box passenger car; The body volume of the three-box passenger vehicle is V1 = {0.5 × (body length - wheelbase) + wheelbase} × body width × body height; the body volume of the two-box passenger vehicle is V2 = {0.665 × (body length - wheelbase) + wheelbase} × body width × body height.

[0024] This embodiment selects five vehicle models to calculate the vehicle body density, as shown in the table below: Model Vehicle weight (M / Kg) <![CDATA[Equivalent body volume / m 3 > <![CDATA[Body density / Kgm -3 <!-- 3 -->]]> Model 1 285 9.49 30.03 Model 2 309.8 9.4 32.96 Model 3 271.7 8.24 32.97 Model 4 292.4 9.62 30.4 Model 5 298 8.13 36.65 Step 3: Using statistical methods, the relationship between vehicle body torsional performance and weight, along with vehicle body density, is quantified into fractions L1 and ρ1 using a linear equation, as follows: The relationship between vehicle body torsional performance and weight, L, is generally between 2.4 and 5.6. When rounded to 2-6, the scores L1 are 10-6 points respectively. The vehicle body density ρ, after rounding, is between 30 and 39, and the score ρ1 is 10-1 points respectively.

[0025] Step 4: Calculate the parameter Y(X) for evaluating lightweighting using a weighted summation method, as follows: Y(X) = aX1 + bX2; Where X1 = 10 - (L1 - 2) / (6 - 2) * (10 - 6); X2=10-(ρ1-30) / (39-30)*(10-1); a and b are the correlation coefficients.

[0026] The correlation coefficients differ for cars priced between 50,000 and 100,000 yuan; for cars priced below 50,000 yuan, a is 60% and b is 40%; for cars priced between 100,000 and 200,000 yuan, a is 70% and b is 30%; and for cars priced above 200,000 yuan, a is 80% and b is 20%.

[0027] This embodiment selects five vehicle models to calculate parameter Y(X). The specific scores for each vehicle model are shown in the table below: Evaluation factors Correlation coefficient Model 1 Model 2 Model 3 Model 4 Model 5 Relationship between vehicle body torsional performance and weight L 60% 8.8 8.5 7.2 6.5 9.2 <![CDATA[Body density / Kgm -3 > 40% 9.9 7.1 7.1 9.6 3.3 Weighted summation 9.24 7.94 7.16 7.74 6.84 Based on the above, the ranking of lightweighting advantages and disadvantages for each model is: Model 1 > Model 2 > Model 4 > Model 3 > Model 5, that is, the larger the parameter Y(X), the better the evaluation of lightweighting.

[0028] In summary, this invention can comprehensively evaluate the lightweighting level of various vehicle models. Through evaluation, it can help understand the comparison of vehicle body lightweighting with competing products in the same class, and guide automakers to reasonably and scientifically control the degree of vehicle body weight optimization.

[0029] Example 2 See Figure 3 This embodiment provides a passenger vehicle body lightweighting evaluation device, including: The first calculation module is used to calculate the relationship L between the vehicle body's torsional performance and its weight. The second calculation module is used to calculate the vehicle body density ρ; The third calculation module is used to quantify the relationship between the vehicle body torsional performance and weight and the vehicle body density into fractions L1 and ρ1 according to the linear first equation based on statistical methods. The fourth calculation module is used to calculate the parameter Y(X) for evaluating lightweighting using a weighted summation method.

[0030] Example 3 Figure 4 This is a structural block diagram of a terminal provided in an embodiment of this application. The terminal can be the terminal described in the above embodiments. The terminal can be a portable mobile terminal, such as a smartphone or tablet computer. The terminal may also be referred to as user equipment, portable terminal, or other names.

[0031] Typically, a terminal includes a processor 301 and a memory 302.

[0032] Processor 301 may include one or more processing cores, such as a quad-core processor or an octa-core processor. Processor 301 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 301 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 301 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 301 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0033] The memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. The memory 302 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 302 are used to store at least one instruction, which is executed by the processor 301 to implement a passenger vehicle body lightweighting evaluation method provided in this application.

[0034] In some embodiments, the terminal may also optionally include: a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes at least one of: a radio frequency circuit 304, a touch display screen 305, a camera 306, an audio circuit 307, a positioning component 308, and a power supply 309.

[0035] Peripheral device interface 303 can be used to connect at least one I / O (Input / Output) related peripheral device to processor 301 and memory 302. In some embodiments, processor 301, memory 302 and peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of processor 301, memory 302 and peripheral device interface 303 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0036] The radio frequency (RF) circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 304 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, the RF circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The RF circuit 304 can communicate with other terminals through at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: the World Wide Web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or WiFi (Wireless Fidelity) networks. In some embodiments, the RF circuit 304 may also include circuitry related to NFC (Near Field Communication), which is not limited in this application.

[0037] The touch display screen 305 is used to display a UI (User Interface). This UI may include graphics, text, icons, videos, and any combination thereof. The touch display screen 305 also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to the processor 301 for processing. The touch display screen 305 is used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, there may be one touch display screen 305, which serves as the front panel of the terminal; in other embodiments, there may be at least two touch display screens, respectively disposed on different surfaces of the terminal or in a folded design; in still other embodiments, the touch display screen 305 may be a flexible display screen, disposed on a curved or folded surface of the terminal. Furthermore, the touch display screen 305 may be configured as a non-rectangular, irregular shape, i.e., a non-rectangular screen. The touch display screen 305 may be made of materials such as LCD (Liquid Crystal Display) or OLED (Organic Light-Emitting Diode).

[0038] Camera assembly 306 is used to acquire images or videos. Optionally, camera assembly 306 includes a front-facing camera and a rear-facing camera. Typically, the front-facing camera is used for video calls or selfies, and the rear-facing camera is used for taking photos or videos. In some embodiments, there are at least two rear-facing cameras, which are any one of a main camera, a depth-sensing camera, and a wide-angle camera, to achieve background blurring by fusion of the main camera and the depth-sensing camera, and panoramic shooting and VR (Virtual Reality) shooting by fusion of the main camera and the wide-angle camera. In some embodiments, camera assembly 306 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash is a combination of a warm light flash and a cool light flash, which can be used for light compensation at different color temperatures.

[0039] Audio circuit 307 provides an audio interface between the user and the terminal. Audio circuit 307 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, converting the sound waves into electrical signals that are input to processor 301 for processing, or input to radio frequency circuit 304 for voice communication. For stereo sound acquisition or noise reduction purposes, multiple microphones may be used, each located in a different part of the terminal. The microphone may also be an array microphone or an omnidirectional microphone. The speaker is used to convert electrical signals from processor 301 or radio frequency circuit 304 into sound waves. The speaker may be a conventional diaphragm speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can convert electrical signals not only into audible sound waves but also into inaudible sound waves for purposes such as distance measurement. In some embodiments, audio circuit 307 may also include a headphone jack.

[0040] The positioning component 308 is used to determine the current geographical location of the terminal in order to enable navigation or LBS (Location Based Service). The positioning component 308 can be a positioning component based on the US GPS (Global Positioning System) or China's BeiDou system.

[0041] Power supply 309 is used to power the various components in the terminal. Power supply 309 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 309 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged via a wired line, while a wireless rechargeable battery is a battery that is charged via a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0042] Those skilled in the art will understand that Figure 4 The structure shown does not constitute a limitation on the terminal and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0043] Example 4 In an exemplary embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements a method for evaluating the lightweighting of a passenger vehicle body as provided in all embodiments of the present application.

[0044] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0045] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0046] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0047] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0048] Example 5 In an exemplary embodiment, an application product is also provided, including one or more instructions that can be executed by the processor 301 of the aforementioned device to complete the aforementioned method for evaluating the lightweighting of a passenger vehicle body.

[0049] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the invention. Further modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method for evaluating lightweighting of a passenger vehicle body, characterized by, The method comprises the following steps: calculating the relationship L between the torsional performance of the vehicle body and the weight; calculating the density ρ of the vehicle body; quantifying the relationship between the torsional performance of the vehicle body and the weight and the density of the vehicle body into scores L1 and ρ1 according to a linear first-order equation by means of a statistical method; calculating the parameter Y(X) for evaluating the lightweight by means of a weighted summation method.

2. The method for evaluating lightweighting of a passenger vehicle body according to claim 1, characterized by, The specific method for calculating the relationship between the torsional performance of the vehicle body and the weight is as follows: L = M / (CT × A); In the formula, M is the weight of the vehicle body; CT is the torsional stiffness of the vehicle body frame; and A is the projected area of the front and rear suspension fixing points.

3. The method of claim 2, wherein The specific method for calculating the density of the vehicle body is as follows: ρ = M / V; In the formula, ρ is the density of the vehicle body; M is the weight of the vehicle body; and V is the volume of the vehicle body.

4. The method of claim 3, wherein The volume V of the vehicle body includes the volume V1 of a three-door passenger vehicle and the volume V2 of a two-door passenger vehicle. The volume V1 of the three-door passenger vehicle is {0.5 × (vehicle body length-axle distance) + axle distance} × vehicle body width × vehicle body height; and the volume V2 of the two-door passenger vehicle is {0.665 × (vehicle body length-axle distance) + axle distance} × vehicle body width × vehicle body height.

5. The method of claim 3, wherein The specific method for quantifying the engineering values of each evaluation factor into scores according to a linear first-order equation by means of a statistical method is as follows: When the relationship L between the torsional performance of the vehicle body and the weight is rounded to 2-6, the scores L1 are 10-6 respectively; When the density ρ of the vehicle body is rounded to 30-39, the scores ρ1 are 10-1 respectively.

6. The method of evaluating the lightweighting of a passenger vehicle body according to claim 5, characterized by, The specific method for calculating the parameter Y(X) for evaluating the lightweight by means of a weighted summation method is as follows: Y(X) = aX1 + bX2; In which, X1 = 10-(L1-2) / (6-2)*(10-6); X2 = 10-(ρ1-30) / (39-30)*(10-1); a and b are correlation coefficients.

7. The method of evaluating the lightweighting of a passenger vehicle body according to claim 6, characterized by, For the vehicle models with a price of 500,000-1,000,000 yuan, a is 60% and b is 40%; for the vehicle models with a price below 500,000 yuan, a is 25% and b is 75%; for the vehicle models with a price of 1,000,000-2,000,000 yuan, a is 70% and b is 30%; and for the vehicle models with a price above 2,000,000 yuan, a is 80% and b is 20%.

8. A passenger vehicle body lightweighting evaluation device, characterized in that, It comprises: a first calculation module for calculating the relationship L between the torsional performance of the vehicle body and the weight; a second calculation module for calculating the density ρ of the vehicle body; a third calculation module for quantifying the relationship between the torsional performance of the vehicle body and the weight and the density of the vehicle body into scores L1 and ρ1 according to a linear first-order equation by means of a statistical method; a fourth calculation module for calculating the parameter Y(X) for evaluating the lightweight by means of a weighted summation method.

9. A terminal, characterized by comprising: It comprises: one or more processors; a memory for storing the processor-executable instructions of the one or more processors; wherein the one or more processors are configured to: execute the passenger vehicle body lightweight evaluation method according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, comprising: When the instructions in the storage medium are executed by the processor of the terminal, the terminal can execute the passenger vehicle body lightweight evaluation method according to any one of claims 1 to 7.

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