Modeling method of quasi-flexible suspension based on bushing

Abstract

The invention discloses a quasi-flexible body discrete suspension modeling method based on a bushing, which relates to the technical field of automobile suspension. By establishing a rigid body component model of the suspension, the model needing to be flexible is divided into several rigid blocks with centralized mass. The rigid blocks are connected by bushings, and the model stiffness to be flexible is approximately replaced by bushing stiffness, which is used as the bearing element. Input rigid body model parameters; The suspension dynamics simulation analysis is carried out and the simulation results are output. Compared with the modal synthesis method, the flexible body modeling method has stronger parametric modeling ability and simplicity. Compared with the flexible body discretization method, the simulation accuracy of thin plate parts is higher, and because the degrees of freedom of the bushing do not affect each other, so the shear locking can be effectively avoided when therigid parts are discretized by the flexible body discretization. In addition, by setting the liner stiffness, the expected simulation optimization results are obtained, which plays a guiding role in the optimization design of the model.

Description

technical field [0001] The invention belongs to the technical field of automobile suspension, and in particular relates to a quasi-flexible body discrete suspension modeling method based on bushings. Background technique [0002] Rigid-flexible coupling system dynamics refers to the dynamics of flexible multi-body systems that use flexible multi-body models instead of rigid-body models when the influence of object deformation on motion in multi-body systems can not be ignored, and consider rigid-flexible coupling effects. The interaction or mutual coupling between the deformation and its large-scale spatial motion, and the dynamic effects caused by this coupling. With the development of the national economy and national defense technology, for many engineering problems, the simple multi-rigid body system model is far from the actual, and cannot meet the engineering accuracy requirements. It is necessary to consider the mutual coupling of the large-scale motion of the compone...

AI Technical Summary

Problems solved by technology

Since the discrete method and automatic flexibility method are only suitable for components with relatively simple structures, in engineering practice, for parts with complex structural shapes, finite element analysis software is usually used to establish flexible bodies, but in the initial stage of design, with the hardware Repeated adjustment and improvement of points, redesigning the model and completing the establishment of the flexible body will be a very time-consuming task, with inconvenient operation, low efficiency, and difficult to meet the actual needs of the project

Images