引言全承载客车车身骨架几乎承受着客车的所有静、动态载荷,因此,其结构设计对整车性能起着举足轻重的作用。客车车身骨架是由薄壁杆件构成的空间结构,其受力情况比较复杂,结构分析难度比较大。随着计算机辅助工程的发展,有限元法 INTRODUCTION The full load carrying body frame of a passenger car bears almost all the static and dynamic loads of a passenger car. Therefore, its structural design plays a decisive role in the performance of the vehicle. Bus body skeleton is composed of thin-walled rod space structure, the force situation is more complex, structural analysis is more difficult. With the development of computer aided engineering, the finite element method