Whole vehicle crash simulation analysis method of railway vehicle based on spline curve

Abstract

The invention discloses a whole vehicle crash simulation analysis method of a railway vehicle based on a spline curve. The method comprises the following steps of: determining the equivalent total rigidity of energy absorbing devices among railway carriages according to energy absorbing characters and serial / parallel connection situations of energy absorbing elements; establishing a mechanical model of a whole vehicle crash multi-degree-of-freedom vibration system; and establishing a whole vehicle crash dynamic property analysis model suitable for nonlinear multibody dynamics and based on thespline curve. According to the method disclosed by the invention, a nonlinear finite element and the nonlinear multibody dynamics are combined for carrying out research on whole vehicle crash simulation; and the established model can be used for well simulating the nonlinear and elasticoplastic deformation of materials and meanwhile expanding the crash simulation analysis of a head vehicle is expanded to the whole vehicle, so that simulation prediction is carried out on movement and longitudinal load of each railway carriage during the whole vehicle crash.

Description

technical field [0001] The invention relates to a simulation analysis method, in particular to a rail vehicle vehicle collision simulation analysis method combining nonlinear finite element and nonlinear multi-body dynamics. Background technique [0002] The rail vehicle is composed of multiple carriages, and its collision is different from the single collision of automobiles, airplanes, ships and other means of transportation. It not only has the collision damage of a single vehicle, but also has the collision problem of each workshop. The train multi-body coupled impact has both multi-particle system dynamics and structural dynamics with large plastic deformation. Mechanics theory and research methods. At present, there are two main types of domestic research on passive safety technology for rail vehicles: one is to use multi-body dynamics software to analyze the kinematics and dynamics characteristics of trains during collisions, because these softwares cannot simulate t...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the limitations of the prior art in the simulation analysis of rail vehicle collision, and provide a method for rail vehicle collision simulation analysis based on spline curves, which combines nonlinear finite element Combined with nonlinear multi-body dynamics for vehicle crash simulation research, the established model can simulate the nonlinear and elastoplastic deformation of materials very well. This method is less dependent on the test, has reliable accuracy and can simulate other The process of exercise can save a lot of manpower, financial resources and time

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