毕业设计（论文）-基于ANSYS北汽福田汽车转向节的强度分析.doc

郑州轻工业学院
本科毕业设计(论文)
题目基于ANSYS北汽福田汽车
转向节的强度分析
学生姓名
专业班级机械设计制造及其
自动化06-1班
学号 200602010109
二零零三年六月
院(系) 机电工程学院
指导教师(职称)
完成时间 2010 年 6 月1 日
北汽福田农用汽车转向节的强度分析
摘要
转向节是汽车转向系统的重要零件,其疲劳强度对车辆行驶的可靠性和安全性有重要意义。本课题以北汽福田转向节为例,主要研究转向节的静强度和疲劳强度。
首先,应用ANSYA前处理模块,在建模过程中,采用了自顶向下的建模方法,通过建立转向节杆部体元素和转向调节部位块元素建立体积单元,再由布尔运算法建立汽车转向节的有限元模型;分析转向节在实际工作过程中的受力情况和约束情况,给转向节施加适当的约束和载荷,进行静强度分析,探讨应力应变分布规律。
其次,应用疲劳分析理论,简化载荷谱,应用名义应力法进行转向节疲劳寿命估算;然后,应用ANSYS软件建立合理的转向节有限元模型,并应用ANSYS软件进行有限元应力分析。在此基础上,考虑零件材料疲劳特性、平均应力等影响因素,使用ANSYS软件进行转向节疲劳仿真,估算其疲劳寿命。
最后,通过静强度分析找出静态应力极限值,通过疲劳分析得出疲劳耗散系数,结合转向节的实际受载情况,分析转向节断裂的真实原因。
关键词:转向节,强度分析,疲劳,有限元
FINITE ELEMENT ANNLYSIS OF FOTON STEERING KNUCKLE
ABSTRACT
Steering knuckle is an important part of automobile steering fatigue strength characteristics of them strongly affect vehicle's reliability and safety. the thesis was aimed at the fatigue research of thesteering knuckle.
First,ANSYA application processing module,In the process of modeling,Using the top-down method of modeling,Through the establishment of steering knuckle stem body element and adjust position to establish volume unit block elements,Again by Boolean method to establish the finite element model of automobile steering knuckle,In the actual work knuckles analysis in the process of stress and constraint conditions,By applying the appropriate for steering knuckle constraints and load,The static strength analysis,explore stress and strain distribution.
Secondly, the application of fatigue analysis theory, the simplified load spectrum, the application of nominal stress method for estimating the fatigue life of steering knuckle.
then, the application of ANSYS software, establish the reasonable knuckles finite element model, and finite element stress analysis. On this basis, consider parts material fatigue properties, the average stress factors as, ANSYS software is used for steering knuckle fatigue simulation, estimate the fatigue life.
Finally, through the analysis of the static stre