Investigation And Simulation Of Coach Side Crashworthiness Using FEM

In the early automobile side crashworthiness analysis, experiments was the primarily method, but the expense of this way was high, moreover this method would cost a very long time. Now, along with computer technology's development, the application of simulating the automobile collision's through the computer simulation has already been more and more widespread. The finite element method was used to research coach's side crashworthiness.First, skeleton's geometric model was established inside the CAD software, then derived the geometric model with the Parasolid form, inducted into the nonlinear finite element software ADINA. In order to consider the side collision, coach's outer covering was established. Beam, Shell and Solid element were used, and the material in the non-dangerous spot was used elastic material, other part of consideration was used Rate-dependent plastic-multilinear material. Then established a equivalent incoming vehicle, and a contact group between the incoming vehicle model and the coach model. Set an initial acceleration for the incoming vehicle model, caused two vehicle collisions.Through the Explicit dynamic method, analyzed coach's distortion situation after side collision, found that the main deformation existing in the side outer covering, the coach skeleton floor crossbeam and the crossbeam under the chair. In order to obtain the influence the side collision to the passenger, analyzed 12 passenger seats' acceleration, speed, deformation under three rows to obtain the change in the collision process. Then found that the most dangerous seat in the collision process would be outside of the centre row. Through changing floor crossbeam and the chair crossbeam'section thickness, found that increasing these two kinds of beam'thickness, could strengthen the coach'ability to resist the side impact.