文档介绍：Structure StrengthAnalysis of Wind Turbine Main Shaft Bearing A Thesis Submitted to Chongqing University in PartialFulfillment of the Requirement for the Master’s Degree of Engineering By Hou Haichen Supervised by Prof. Du Jing Specialty: ME (Mechanical Engineering Field) College of Mechanical Engineering of Chongqing University,Chongqing,China May 2013 中文摘要 I 摘要风电机组主轴轴承结构及受力复杂,设计质量好坏直接影响着风电机组的可靠性、安全性及发电效率。论文以德国船级社风力发电机组认证规范及欧洲规范为依据,结合现代设计理论及分析方法,采用非线性有限元方法,对某MW级风力发电机组主轴轴承进行分析,研究成果为主轴轴承的设计提供参考,具有工程实用价值。论文主要研究内容如下: ①详细介绍了包括主轴系统的支撑类型、主轴轴承的结构作用,介绍了轴承强度计算接触理论,为后续的有限元分析奠定了基础。②用GAP单元对双列调心滚子轴承进行建模,建立了主轴系统的有限元模型,进行了极限工况下的静强度和变形分析,为调心轴承建模提供一种有效的方法。③对主轴轴承进行了疲劳寿命分析。根据GL规范设定主轴轴承的材料S-N 曲线,同时利用Bladed软件仿真得到的疲劳载荷时间历程,结合改进的雨流计数法得到疲劳载荷谱。基于改进型Palmgren-Miner线性累计损伤理论,计算得到主轴轴承总的疲劳损伤值。为轴承的疲劳寿命分析提供了一种新思路。关键词:风力发电机组,主轴轴承,GAP单元,强度,疲劳寿命重庆大学硕士学位论文 II 英文摘要 III ABSTRACT Because of the complexity on the bearing structure and loads of the main shaft of wind turbine, the quality of design has a direct influence on the reliability, safety and efficiency of the wind turbine. According to the Germanischer Lloyd certification standards and the European standard of wind turbine, as well as the modern design theory and analysis method, analysis of the main shaft bearing of a MW class wind turbine is carried out by the nonlinear finite element method. The research results provide reference for design of main shaft bearing, and has practical value in engineering. Main researches covered in this paper are as follows: ① At first, the basic knowledge of main shaft system was elaborated ,Including the support type, the main shaft bearing’s structure and function. Onthe basis of the above, The related theoretical knowledge of bearing was introduced, including the theory of bearing contact theory, laid a solid foundation for the subsequent finite element analysis. ②The finite element model of main sh