Simulation checking method for maximum limit deflection of first-grade plate spring with unequal bias frequency and gradually-changed stiffness

Abstract

The invention relates to a simulation checking method for the maximum limit deflection of a first-grade plate spring with unequal bias frequency and gradually-changed stiffness and belongs to the technical field of suspension steel plate springs. The maximum limit deflection of the first-grade plate spring with the unequal bias frequency and the gradually-changed stiffness can be subjected to simulation checking on the basis of simulation calculation of a contact load and determination of a maximum allowable load according to the structure parameter, elastic modulus and maximum allowable stress of each of main springs and auxiliary springs as well as initial tangent camber height design values of the main springs and the auxiliary springs. Known by example simulation checking and model machine loading deflection tests, the simulation checking method for the maximum limit deflection of the first-grade plate spring with the unequal bias frequency and the gradually-changed stiffness, provided by the invention, is correct. By using the method, an accurate and reliable simulation checking value for the maximum limit deflection can be obtained, the design level and reliability of a product can be improved, the service life of the product can be prolonged, and the driving safety of a vehicle can be improved; and meanwhile, the designing and experiment testing expenses can also be reduced, and the development speed of the product can be increased.

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 non-equal-bias frequency first-order gradient stiffness leaf spring. Background technique [0002] In order to meet the strength requirements of the main spring of the first-level gradient stiffness leaf spring, the auxiliary spring usually acts to bear the load as soon as possible to reduce the stress of the main spring, that is, the non-equal frequency one-level gradient stiffness leaf spring is used, wherein, according to the maximum allowable stress And the maximum limit deflection corresponding to the maximum allowable load, set a limit device to prevent the leaf spring from breaking due to impact load, and improve the reliability and safety of the leaf spring suspension. However, due to the constraints of the main spring deflection calculation, contact load simulation calculation and determination of the ma...

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Problems solved by technology

However, due to the constraints of the main spring deflection calculation, contact load simulation calculation and determination of the maximum allowable load of the non-equal frequency one-stage gradual stiffness leaf spring, the maximum non-equal frequency one-stage gradual stiffness leaf spring has not been given before. Most of the simulation test algorithms for limit deflection are designed based on experience. Therefore, it is difficult to obtain an accurate and reliable maximum limit deflection design value, and it is difficult to ensure that the limit device can protect the leaf spring under impact load, let alone Meet the requirements of the rapid development of the vehicle industry and the development of modern CAD software

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