Contact load simulating calculation method for high-strength two-level gradually changing stiffness plate spring

Abstract

The invention relates to a contact load simulating calculation method for a high-strength two-level gradually changing stiffness plate spring, and belongs to the technical field of vehicle suspension steel plate springs. The contact load of the equal offset frequency high-strength two-level gradually changing stiffness plate spring can be calculated in a simulating manner according to structural parameters of main springs and auxiliary springs, elastic modulus, initial tangent arc height design values of the main springs and initial arc height design values of the first-level auxiliary spring and the second-level auxiliary spring by the aid of the relation between the contact load and the deflection of the main springs and the auxiliary springs and the relation between the curvature radius and the initial tangent arc height. According to comparison of verification values with design requirement values and model machine experiment test values, the contact load simulating calculation method for the high-strength two-level gradually changing stiffness plate spring is correct. By the method, accurate and reliable contact load simulating calculation values can be acquired, so that product design level, quality and performances are improved. Besides, design and experiment expenses are reduced, and product development is accelerated.

Description

technical field [0001] The invention relates to a simulation calculation method of the contact load of a leaf spring of a vehicle suspension, especially a leaf spring of high strength with two stages of gradually changing stiffness. Background technique [0002] With the emergence of high-strength steel plate materials, high-strength two-stage gradient stiffness leaf springs can be used for vehicle suspension, so as to further meet the design requirements of vehicle ride comfort and suspension gradient bias frequency under different loads. Among them, The contact load of the gradient stiffness plate spring affects the stress of the leaf spring, the stress of the main spring and the auxiliary spring, the gradient stiffness, the suspension bias frequency and the ride comfort of the vehicle, and also restricts the high-strength two-stage gradient stiffness plate for a given design structure Simulation verification of spring deflection, stiffness, stress and other characteristic...

AI Technical Summary

Problems solved by technology

However, due to the gradual contact between the main spring and the primary and secondary auxiliary springs, the contact length and the gradual stiffness change with the load, the calculation of the main spring deflection of the high-strength two-stage gradient stiffness leaf spring is very complicated, and the contact The simulation calculation of the load is related to the calculation of the deflection, tangent arc height and radius of curvature of the leaf spring under a certain load. Therefore, according to the research data, the contact load of the high-strength two-stage gradient stiffness leaf spring has not been given before at home and abroad. simulation calculation method

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