BJ01C7车车架建模及模态分析毕业论文论文报告.docVIP

河 北 工 业 大 学 毕 业 论 文 作 者： 曾祥雷 学 号： 100282 学 院： 机械学院 系(专业)： 车辆工程 题 目： BJ01C7车车架建模及模态分析 指导者： 崔根群 教授 评阅者： (姓 名) (专业技术职务) 2014年 5月 24日 毕业设计（论文）中文摘要 BJ01C7车车架建模及模态分析 摘要： 车架也称大梁。，由两根纵梁和根横梁组成，经由在车轮上。 Title BJ01C7 car frame modeling and modal analysis Abstract Frame, also calls the girder. Car matrix, generally is composed of two beams longitudinal beam and a few root, through suspension, front axle and rear axle bearing on the wheel. Have enough strength and stiffness to withstand a load of car and blow came from the wheels. Frames function is to support and to connect all the assembly of the car, make each assembly relatively correct position, and under various load car inside and outside. In order to make the car have enough strength and rigidity to bear the load and impact, and auto are introduced in the design process of finite element analysis. This topic according to the need of BJ01C7, draw a frame of 3 d model, to improve the frame structure, the modeling and calculation analysis. In this paper, the CAD 2 d graphics technology, UG three-dimensional modeling technology is used in the design of the frame structure, and the reasonable using Nastran finite element analysis technique to analyze the frame, get the frame under various static working condition of stress distribution, the second to the modal analysis of frame, get natural frequencies and natural modes of the frame. Then do random vibration response spectrum analysis, get the frame under road excitation displacement response and stress response. According to the structure of the transfer function to determine the modal frequency and vibration mode, on the basis of the proposed improvements Key words：frame random vibration modaling modaling analysis The finite element a