Simulating checking calculation method for limiting flexibility of two-stage main spring type non-equal offset-frequency type gradual-change-rigidity plate spring

Abstract

The invention relates to a simulating checking calculation method for limiting flexibility of a two-stage main spring type non-equal offset-frequency type gradual-change-rigidity plate spring and belongs to the technical field of suspension steel plate springs. According to the simulating checking calculation method, according to structural parameters of various pieces of first-stage and second-stage main springs and auxiliary springs, the elastic modulus, the clamping distance of a U bolt and the initial tangent line arc height, on the basis of simulating calculation of the contact load of each time, the gradual change rigidity and the maximum allowed load, the maximum limiting flexibility of the two-stage main spring type non-equal offset-frequency type gradual-change-rigidity plate spring is subjected to simulating calculation. It can be seen that from a model machine loading flexibility test, the simulating checking calculation method for the maximum limiting flexibility of the two-stage main spring type non-equal offset-frequency type gradual-change-rigidity plate spring is correct, and a reliable technological basis is laid for design of the installing position of a limiting device. By means of the method, an accurate and reliable simulating checking calculation value of the maximum limiting flexibility can be obtained, and the product design level reliability and the vehicle running safety are improved; and meanwhile, the product design, test and maintenance cost is reduced, and the product developing speed is increased.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a simulation test algorithm for limiting deflection of a two-stage main spring type non-equal bias frequency type gradient stiffness leaf spring. Background technique [0002] In order to further improve the driving comfort of the vehicle under half-load conditions, the main spring of the original one-stage gradient stiffness leaf spring can be split into two-stage main springs, that is, two-stage main spring type gradient stiffness leaf springs; at the same time, in order to ensure that the main The stress strength of the spring, usually through the initial tangent arc height of the first-stage main spring, the second-stage main spring and the auxiliary spring, and the two-stage gradual change gap, so that the second-stage main spring and the auxiliary spring can bear the load in advance, that is, to give the secondary contact The load is properly advanced to reduce the stress...

AI Technical Summary

Problems solved by technology

However, the calculation of the deflection of the two-stage main spring type unequal frequency gradient stiffness leaf spring is very complicated, and is subject to the calculation of the equivalent thickness and gradient stiffness of the overlapping parts of the root of the leaf spring of each stage, as well as the simulation calculation of the contact load and the maximum allowable load. Constraints, the simulation algorithm for the limit deflection of the two-stage main spring type non-equal bias frequency type gradient stiffness leaf spring has not been given before, so it cannot meet the rapid development of the vehicle industry and the modern CAD design requirements of suspension springs

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