Frame structure crashworthiness and lightweight design method for formula car

Abstract

The invention belongs to the technical field of structure optimization design, and particularly relates to a formula car-oriented car frame structure crashworthiness and lightweight design method. The core of the technical scheme is that a structure nonlinear collision dynamic model involved in formula car frame structure design is converted into a linear statics model by selecting a proper main node and applying a reduced-order equivalent static load calculation method provided by the invention; collaborative design of crashworthiness and light weight of the frame structure is realized by applying a topological optimization theory, so that the design and development period of the frame structure is shortened, and the design precision and the comprehensive performance of the racing car structure are improved.

Description

technical field [0001] The invention belongs to the technical field of structural optimization design, and in particular relates to a design method for the crashworthiness and lightweight of a frame structure for a formula racing car. Background technique [0002] The China Formula Car Competition was first established by the China Automotive Engineering Society in 2010. It aims to cultivate the car design, manufacturing and testing capabilities of college students. The rules of the competition require participating teams to independently design and manufacture a small single-seater car within one year. , and investigate the acceleration, braking and cornering performance of the car. This event requires the frame structure to have sufficient crashworthiness to prevent the cockpit from being squeezed, thereby causing damage to the driver, while reducing the degree of damage to the frame structure in the event of a frontal collision. According to the analysis of competition r...

AI Technical Summary

Problems solved by technology

[0004] (1) Existing design methods are mostly based on the designer’s experience, and a new frame structure is developed on the basis of the original structure, resulting in limited performance improvement of the new structure, and at the same time causing waste of materials and overweight of the vehicle;

[0005] (2) Existing design methods are rarely carried out based on modern optimal design theory, and the improvement of the racing car frame in the design process is also completed through trial production-test analysis, which further increases the cost and cycle of frame structure design and development;

[0006] (3) The existing design methods mainly provide a theoretical basis for the improved design of the structure through the finite element analysis method, and the conceptual optimization design considering the crashworthiness of the structure has not yet been carried out on the basis of the finite element model

However, this method does not extend the structural optimization design technology to the frame development process considering the structural crashworthiness, forming an efficient structural optimization design method

[0007] (4) The existing optimization design method only considers the static performance (static strength and maximum deformation, etc.) The optimal design of structural crashworthiness and dynamic response, which leads to the passive inspection of the structure’s crashworthiness only as a verification index of the structure, and is not integrated into the structural optimization design process, resulting in low efficiency of structural optimization or structural crashworthiness. sex is not guaranteed

[0008] (5) Although the existing structural design method of formula car frame uses topology optimization method to test the lightweight performance of the structure in the structural concept stage, it does not involve structural crashworthiness in structural topology optimization

Although this invention solves the problem that there is no clear evaluation index for the lightweight design of the current formula car frame, it does not take into account the crashworthiness, stiffness and lightweight performance of the frame structure from the perspective of structural optimization, making it impossible to directly guarantee or improve it. crashworthiness of the structure

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