A Rigid-Flexible Coupling Simulation Method for Vehicle Leaf Springs

Abstract

The invention discloses a vehicle leaf spring rigid-flexible coupling simulation method. The method comprises the following steps that: a rigid body model is established according to an actual vehicle leaf spring; vertical restraint is performed on the model leaf spring of the rigid body model; unit forces are applied to two ends of the model leaf spring respectively, and a unit rigidity matrix is established; bushing forces are respectively applied to places on the model leaf spring which are corresponding to the hanging lug hinge points of the actual vehicle leaf spring, so that flexible connections between actual vehicle hanging lugs and a vehicle body can be simulated; bushing forces are respectively applied to hard points on the model leaf spring which are corresponding to the hanging lug hinge points of the actual vehicle leaf spring, so that flexible connections between actual vehicle hanging lug pin shafts and the vehicle body can be simulated; and models of the rigid body and the flexible connections are built according to the hard point coordinates on the model leaf spring, and the physical characteristics of the actual vehicle leaf spring can be restored as far as possible. With the vehicle leaf spring rigid-flexible coupling simulation method of the invention adopted, the physical characteristic parameters of the actual vehicle leaf spring can be acquired and researched, so that reference can be provided for actual vehicle production.

Description

technical field [0001] The invention relates to the field of vehicle simulation, in particular to a method for simulating rigid-flexible coupling of a vehicle leaf spring. Background technique [0002] Automobile suspension spring is an elastic element in the automobile suspension, which makes the axle and the body or the body elastically connected, bears and transmits the vertical load, eases and suppresses the impact caused by the uneven road surface, so as to ensure the normal driving of the car. [0003] Leaf spring (referred to as leaf spring) is the most widely used elastic element in automobile suspension. It is an elastic beam of approximately equal strength composed of several alloy spring pieces of equal width but unequal length, and is fixed on the bracket or lug seat on the vehicle body with a spring pin to form a hinge connection. The middle part of the leaf spring is generally fixed on the axle with U-shaped bolts. When the leaf spring deforms under load, fri...

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Problems solved by technology

[0004] Therefore, in order to ensure the safety performance of the vehicle, the performance indicators of the leaf spring need to meet strict requirements during production, which requires simulation of the actual vehicle leaf spring working conditions during design to achieve its physical characteristics parameters to collect and research, so as to provide reference for actual vehicle production, but there is currently a lack of a suitable simulation method

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