ANSYS汽车车架在静载和动载下力学问题的有限元分析
关键词 汽车车架 路面不平度 静载分析 随机模拟 瞬态分析
毕业论文设计说明书（论文）外文摘要
Title The Finite Element Analysis of A Chassis Frame under Static Load and Dynamic Load
Abstract
The vibration of the vehicle will be caused when the vehicle run on uneven road. Road roughness is a very important factor to influence the vehicle vibration. The study on the influence for vehicle, the analysis of the influence for vehicle mechanical property and the construction and maintenance of the road have important guiding significance. This research
include the static analysis of the vehicle frame model and importantly the transient analysis of the vehicle frame model to obtain the influence of road roughness to the vehicle vibration by computer stochastic simulation for road roughness value. The research get the vibration of the vehicle frame model for different road level and different vehicle driving speed. The result of the research provide advisory guidance for the influence of road roughness to vehicle vibration, and have important research significance.
Keywords chassis frame road roughness static load analysis stochastic simulation transient analysis
目 次
1 绪论 1
1.1 本课题相关知识前景 1
1.2 拟采用的研究内容和方法： 2
2 车架有限元模型 2
2.1 ANSYS建模 2
2.2 车架模型图纸尺寸 3
2.3 车架实体模型 3
2.4 模型离散规格 4
3 载荷的确定 5
3.1 载荷的简化和假设 5
3.2 车架承受各设备的重量及位置 6
3.2.1 车架设备分布图 6
3.2.2 车架各设备的重量和位置 6
3.3 风载的计算 7
3.4 有限元模型的约束处理 8
3.5 车架承受力分析 8
3.5.1 车架承受力示意图 8
3.5.2 车架模型单元节点受力计算 10
4 静载分析 10
4.1 车架整体位移云图和应力云图 11
4.2 车架X方向位移云图和应力云图 12
4.3 车架Y方向位移云图和应力云图 13
4.4 车架Z方向位移云图和应力云图 14
5 模态分析 16
6 路面不平度 21
6.1 理论知识 21
6.1.1 路面功率谱 21
6.2.2 随机谐波叠加模拟 22
6.2.3 道路路面等级与路面不平度系数 23
6.2 路面位移谱 23