Finite element analysis method for formula racing car frames

Abstract

The invention provides a finite element analysis method for formula racing car frames, belongs to the technical field of computer aided engineering, and aims at solving the problem that existing racing car frame optimization and analysis are bad in correctness and long in design period. The finite element analysis method comprises the following steps of: A, constructing a three-dimensional model and carrying out meshing to convert the three-dimensional model into a finite element model; B, applying boundary conditions according to each working condition, carrying out finite element analysis and calculation on frame bending rigidity under each working condition, and comparing the analysis result with material bending strength to carry out structure optimization; C, respectively applying forced displacement in opposite directions on two sides of the car frame, carrying out finite element analysis and calculation to obtain torsional rigidity of the car frame, and carrying out structure optimization according to the analysis result; and D, analyzing and comparing whether a fixed frequency of each order modal of the car frame is different from an external main excitation frequency or not, and carrying out structure optimization according to the result. According to the method, the correctness of optimization and analysis is improved, the expenditure is decreased and the design period is shortened.

Description

technical field [0001] The invention belongs to the technical field of computer-aided engineering, and relates to a finite element analysis method for a car frame of a formula racing car. Background technique [0002] Racing cars must be manufactured in accordance with the procedures stipulated in the vehicle technical regulations issued by the International Automobile Federation, including body structure, length and width, minimum weight, engine working volume, number of cylinders, fuel tank capacity, electronic equipment, distance and size of tires, etc. A racing car built with a common formula (rule restrictions) is a formula car. [0003] As the carrier of other parts of the racing car, the frame not only bears the weight of the parts connected to the frame during the running of the car, but also bears various forces and moments transmitted to it by the road surface and parts. For racing cars, reducing the weight of the car can improve fuel economy and power. Therefore,...

AI Technical Summary

Problems solved by technology

[0005] The design and manufacture of the existing space truss-type steel pipe frame relies on the successful cases of previous frames and the subjective experience of the designer. The accuracy of optimization analysis is poor, and the designed frame has weak local strength, uneven overall strength, or excessive design. The materials cannot be fully applied, and the frame is not optimized enough to appear bulky, which affects the fuel economy, power and lightweight requirements of the car

Moreover, in the design process, the improvement and optimization of the racing car frame is also completed through step-by-step design, test and analysis. The experimental funds are expensive and the design cycle of the frame is relatively long.