Simulation checking calculation method for maximum limiting deflection of equal-gradual-change offset frequency two-stage-gradual-change rigidity plate springs

Abstract

The invention relates to a simulation checking calculation method for maximum limiting deflection of equal-gradual-change offset frequency two-stage-gradual-change rigidity plate springs and belongs to the technical field of vehicle suspension steel plate springs. According to structural parameters of each main spring and each auxiliary spring, elasticity modulus, maximum allowable stress, the initial tangent-line arc-height design values of the main springs and the initial tangent-line arc-height design values of the first-stage auxiliary springs and the second-stage auxiliary springs, the maximum limiting deflection of the equal-gradual-change offset frequency two-stage-gradual-change rigidity plate springs is subjected to simulation checking calculation. Through simulation and prototype testing test verification, it is known that the simulation checking calculation method for the maximum limiting deflection of the equal-gradual-change offset frequency two-stage-gradual-change rigidity plate springs is correct. By utilizing the simulation checking calculation method, the accurate reliable simulation checking calculation value of the maximum limiting deflection can be obtained, the maximum limiting deflection is ensured, and a limiting device meets the design requirements, so that the design level, the property, the service life and the riding comfort and safety of vehicles of products are improved; and meanwhile, designing and testing cost is lowered, and the product developing speed is accelerated.

Description

technical field [0001] The invention relates to a vehicle suspension leaf spring, in particular to a simulation test algorithm for the maximum limit deflection of a plate spring with equal gradual frequency deviation and two stages of gradually changing stiffness. Background technique [0002] With the emergence of high-strength steel plate materials, the vehicle suspension can adopt two-stage gradient stiffness leaf springs with equal gradient bias frequency, so as to further meet the design requirements of vehicle ride comfort and suspension gradient bias frequency under different loads. Among them, the maximum limit deflection of the leaf spring with gradually changing stiffness is the basis for setting the limit device. For a leaf spring with two stages of gradually changing stiffness with equal gradient bias frequency and a given design structure, can the limit device really protect the leaf spring and prevent If it breaks due to impact, the maximum limit deflection mus...

AI Technical Summary

Problems solved by technology

Because the deflection of the main spring is not only related to the structural parameters and loads of the main spring, the first-level auxiliary spring and the second-level auxiliary spring, but also related to each contact load, and the contact length and gradual stiffness in the gradual contact process change with the load , therefore, the calculation of the main spring deflection of the two-stage gradient stiffness leaf spring with equal gradient bias frequency is very complicated

However, for the simulation calculation of the maximum limit deflection of a leaf spring with equal gradient deviation frequency and two-stage gradient stiffness of a given design structure, in addition to being restricted by the calculation of the deflection of the main spring, it is also subject to the key points of the simulation calculation of the contact load and the maximum allowable load. Constraints of the problem, according to the research data, the simulation test algorithm for the maximum limit deflection of the leaf spring with equal gradient bias frequency and two-stage gradient stiffness has not been given before at home and abroad.

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