螺栓疲劳强度计算分析
摘要：在应力理论、疲劳强度、螺栓设计计算的理论基础之上，以疲劳强度计算所采取的三种方法为依据，以汽缸盖紧螺栓连接为研究对象，进行本课题的研究。假设汽缸的工作压力为0~1N/mm2=之间变化，气缸直径D2=400mm，螺栓材料为5.6级的35钢，螺栓个数为14，在F〞=1.5F，工作温度低于15℃这一具体实例进行计算分析。利用ProE建立螺栓连接的三维模型及螺杆、螺帽、汽缸上端盖、下端盖的模型。先以理论知识进行计算、分析，然后在分析过程中借助于ANSYS有限元分析软件对此螺栓连接进行受力分析，以此验证设计的合理性、可靠性。经过近几十年的发展，有限元方法的理论更加完善，应用也更广泛，已经成为设计，分析必不可少的有力工具。然后在其分析计算基础上，对于螺栓连接这一类型的连接的疲劳强度设计所采取的一般公式进行分类，进一步在此之上总结。
关键词：螺栓疲劳强度，计算分析，强度理论，ANSYS 有限元分析。
Bolt fatigue strength analysis
Abstract: In stress fatigue strength theory， bolt， design calculation theory foundation to fatigue strength calculation for the three methods adopted according to the cylinder lid， fasten bolt connection as the object of research， this topic research. Assuming the cylinder pressure of work is 0 ~ 1N/mm2 changes， cylinder diameters between = = 400mm， bolting materials D2 for ms5.6 35 steel， bolt number for 14， in F \15 ℃， the temperature calculation and analysis of concrete examples. Using ProE establish bolt connection three-dimensional models and screw， nut， cylinder under cover， cover model. Starts with theoretical knowledge calculate， analysis， and then during analysis， ANSYS finite element analysis software by this paper analyzes forces bolt connection， to verify the rationality of the design of and reliability. After nearly decades of development， the theory of finite element method is more perfect， more extensive application， has become an indispensable design， analysis the emollient tool. Then in its analysis and calculation for bolt connection， based on the type of connection to the fatigue strength design of the general formula classification， further on top of this summary. Keywords: bolt fatigue strength， calculation and analysis， strength theory， ANSYS finite elements analysis.
目 录
1绪论 ................................................................................................. 5
1．1绪论 ....................................................................................... 5 1.2 疲劳强度的概念及常见的疲劳损伤类型 ......................................... 5 1.3影响疲劳强度的因素 ................................................................... 6 1.4前景展望 ................................................................................... 6 1.5研究的目的意义 ......................................................................... 6 2相关背景知识 ..................................................................................... 7 2.1背景知识 ................................................................................... 7
2.1.1强度理论及疲劳强度的计算主要有三种方法： ........................ 7 2.4螺栓连接的结构设计的原则 ........................................................ 13 3 Pro/E三维造型 ............................................................................... 14 3.1 ProE简介 ............................................................................... 14 3.2螺栓连接零件图 ....................................................................... 14 4实例分析 ......................................................................................... 18 4.1理论分析 ................................................................................. 18
4.1.1计算各力的大小 .............................................................. 18 4.2理论分析总结 ........................................................................... 20 5 ANSYS有限元分析 ........................................................................... 21 5.1ANSYS有限元分析 ................................................................... 21
5.1.1分析软件及工作原理介绍 .................................................. 21 5.1.2 ANSYS分析求解步骤 ...................................................... 23 5.2 ANSYS分析............................................................................ 23 5.3ANSYS分析总结 ...................................................................... 27 总 结 .............................................................................................. 28 [参考文献] ......................................................................................... 29 致 ................................................................................................. 31
螺栓疲劳强度计算分析报告
