动车组的三维建模及静强度分析.doc

兰州交通大学毕业设计（论文）  PAGE \* MERGEFORMAT 4 CRH型动车组的三维设计及静强度分析 热能与动力工程 201004437 何飞 指导老师 李刚（教授） 摘 要 我国铁路己经进入高速发展的阶段，高速动车组受到了广泛的重视，而车体是列车运行性能的重要体现，在列车设计中占有重要的地位。本论文工作主要是对CHR2高速动车组头车车体结构进行有限元分析和强度评价。 本文针对CRH2型动车组进行合理的简化并建立三维整车几何模型，并在此基础上，利用壳单元及体单元建立车体有限元模型。参照相应规范对铝合金车体在满载荷下会车时的疲劳强度进行计算分析。同时还对铝合金车体的模态进行了分析。得出结论：车体结构强度、刚度满足要求。 关键词：高速列车，车体，有限元分析，强度，载荷识别。 ABSTRACT In the stage of high-speed development of our country railway,the high-speed function of the train is subjected to an extensive value.The car body is the important expression of the train’s performance,and it occupies an important position in the train design.This paper is mainly divided into two parts:one part is the finite element analysis about the vehicle car body,the other part is the load identification. In this paper,reasonable simplification is done at the foundation of two-dimensional engineering drawings of the vehicle body manufactured by CSR SiFang Locomotive and Rolling Stock CO”LTD,The 3D models of the vehicle body is established.Based on this,using shell elements and solid elements,the finite element model of the car body is established.According to standard,strength and its fatigue strength under typical load calculation of the aluminum alloy car body is carried on analysis.The specific condition has five kinds:vertical load，car-compression load，reversing load,three support loads，hermetic load Also modes of the car body at different modes are analyzed. Measure the dynamic stress of the truck body CHR2 and carry on processing analysis towards the dynamic stress signal.With all these results and the results of element analysis,the identifications about the lotus coefficient,coupler load and the load on anti-yaw damper are fulfilled.The identification results of trains running in both the online and 200 km/h speed grades lines are analyzed and compared. KEYWORDS:high-speed train,，vehicle body，finite element analysis，strength ，load identification 1 绪论 1.1 课题研究的背景 随着国民经济的快速发展，对铁路运输提出了更高的要求，中国