The Study Of Passive Safety Simulation For Heavy Truck Body Based On FEM

In recent years, as the increase of high-speed and heavy load demand in China's highway transportation, heavy truck's traffic accidents have occurred frequently, and the problem of its passive safety has become more obvious. Meanwhile, the high threshold of the heavy truck abroad market puts forward an urgent requirement on improving the performance of products'passive safety to the Chinese manufacturing enterprises which right to join international competition. Therefore, the domestic institutions and enterprises focus more on the research field of truck passive safety.This thesis analyzes the international auto collision research methods and the present development on collision FEM simulation, clarifies the advantages of applying FEM to auto collision research, points out the deficiencies of current domestic collision FEM simulation and the urgency for truck passive safety simulation research. Combining with the main algorithm in LS-DNYA software, this paper also introduces the collision FEM theory.The main research work is as follow. First, analyze the truck body structure in order to do the research on the application of modeling technology in the crash simulation. Secondly, make the static verification to the truck body model so as to validate the accuracy of the model. Thirdly, referring to the specification of GB11551, give the simulation analysis on model's frontal and wide around crash, then according to the simulation result, give the two points on truck body structure improvement, and make the validation and evaluation on improved effect. Finally, it describes the main experiment methods of rolling crash, according to the specification of ECE R66, complete the analysis and evaluation of truck body's rolling crash simulation.Currently, the domestic research on truck passive safety is still in its infancy, the flow of the crash simulation analysis presented in this paper will give some reference value in the future passive safety simulation research, it can also give guidance to enterprises on improving the truck's body structure, which has practical significance.