Automobile steel plate spring stiffness checking method

Abstract

The invention relates to an automobile steel plate spring stiffness checking method which belongs to the field of automotive suspensions. Steel plate spring stiffness directly influences the performance of a suspension, but an accurate stiffness checking method does not exist. According to a mechanical model of an automobile steel plate spring, a steel plate spring stiffness checking method is established by virtue of an energy principle and a superposition principle. The established steel plate spring stiffness checking method adopts an analytical calculation method which can be used for accurately checking the steel plate spring stiffness compared with the conventional common curvature method, so that the development efficiency is improved, lots of experimental costs are saved, and the method points a direction for the design of the steel plate spring. The method can be used for design of the automobile suspension steel plate spring.

Description

technical field [0001] The invention relates to automobile leaf springs, in particular to checking the stiffness of automobile leaf springs. Background technique [0002] Leaf spring is the most widely used elastic element in automobile suspension. It is composed of several alloy spring pieces of equal width but unequal length (the thickness can be equal or not). An approximately equal strength elastic beam. The stiffness and deformation of the leaf spring have an important impact on the handling stability and smoothness of the car. With the development of the automobile industry, higher requirements are put forward for the design of vehicle leaf springs. However, at present, there is no accurate analytical calculation and checking method for the stiffness of automobile leaf springs at home and abroad. Although scholars at home and abroad have done a lot of research on this, most of them refer to the common curvature method given in "Automotive Engineering Handbook" or "A...

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Problems solved by technology

However, at present, there is no accurate analytical calculation and checking method for the stiffness of automobile leaf springs at home and abroad.

Although scholars at home and abroad have done a lot of research on this, most of them refer to the common curvature method given in "Automotive Engineering Handbook" or "Automotive Design". The bending moment received is proportional to its moment of inertia, but in fact, due to the unequal length of each piece of the leaf spring, the bending moment received is not proportional to its moment of inertia

Therefore, the leaf spring stiffness calculated by the common curvature method deviates greatly from the actual stiffness, which cannot meet the increasingly lean design requirements of modern automobiles

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