中文摘要：

以新一代高速动车组中间车车体为研究对象，在车体结构的三维几何模型的基础上，利用大型通用建模软件Hypermesh进行前处理，建立了车体有限元模型，并以Ansys软件进行了分析求解．首先对车体的典型荷载工况进行分析，给出静强度评估；其次通过对车体进行模态分析以及根据近似理论的计算，给出了理论估计值和模态分析值的刚度评估，为车体结构的实际设计和优化提供了有效的参考依据．

英文摘要：

The middle car body of a new generation high-speed EMU is studied. A finite element analysis model is constructed using software Hypermesh, and the model data is imported into ANSYS software to ob- taine solutions. The static mechanic behaviors of the middle car body under some typical load cases are ana- lyzed, and the evaluation of static strengthen is determined. The dynamic stiffness evaluation is presented by comparing the results of numerical simulation of natural vibration modal with approximate theory, which pro-vides an effective reference for practical design and structural optimization of the car body.