考虑强度退化和失效相关性的风电齿轮传动系统动态可靠性分析

doi:10.3901/JME.2016.11.080

机械工程学报 ›› 2016, Vol. 52 ›› Issue (11): 80-87.doi: 10.3901/JME.2016.11.080

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考虑强度退化和失效相关性的风电齿轮传动系统动态可靠性分析

周志刚¹, 徐芳²

1. 河南科技大学车辆与交通工程学院洛阳 471003;
2. 河南科技大学机电工程学院洛阳 471003

出版日期:2016-06-05 发布日期:2016-06-05
作者简介:周志刚(通信作者),男,1978年出生,博士,副教授。主要研究方向为机械传动系统动力学及动态可靠性、新能源装备设计理论与方法。E-mail：hnmczzg@163.com;徐芳,女,1980年出生,硕士,讲师。主要研究方向为机械传动系统动力学及可靠性。E-mail：hbxfzzg01@163.com
基金资助:
国家自然科学基金(51305126)和河南省教育厅科学技术研究重点(13A460274)资助项目

Dynamic Reliability Analysis of Gear Transmission System of Wind Turbine Considering Strength Degradation and Dependent Failure

ZHOU Zhigang¹, XU Fang²

1. College of Vehicle and Transportation Engineering, Henan University of Science and Technology, Luoyang 471003;
2. College of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003

Online:2016-06-05 Published:2016-06-05

摘要/Abstract

摘要： 针对随机风作用下风力发电机齿轮传动系统失效率高的问题,研究了随机风引起的风力发电机传动系统外部风载荷以及内部由齿轮、轴承刚度及综合啮合误差等引起的内部动载荷激励,基于集中质量法建立了风电齿轮传动系统齿轮-轴承耦合动力学模型。在对模型进行仿真求解的基础上,分别求得了传动系统中各齿轮和轴承的动态接触应力-时间历程。将载荷作用过程视为随机过程,推导出随机载荷作用下的等效载荷累计分布函数,从系统层面上建立了基于应力-强度干涉理论的风力发电机齿轮传动系统动态时变可靠性模型, 模型考虑了零件的失效相关性和强度退化因素,研究了失效相关性和强度退化对风电齿轮传动系统可靠度和失效率的影响规律,为风力发电机齿轮传动系统动态设计和可靠性优化设计奠定了基础。

关键词: 齿轮传动系统, 动态可靠性, 风力发电机, 强度退化, 失效相关性

Abstract: For the high failure rate of gear transmission system of wind turbine under the random wind conditions, the external wind load of gear transmission system of wind turbine induced by random wind and the internal dynamic loads induced by the stiffness of rolling element bearing and the gear and the synthesizing gear mesh error are researched,the lumped mass method is used to establish the coupled gear-bearing dynamics model of gear transmission system of wind turbine. The dynamic contact stress-time history of each pair of gears and each supporting bearing are obtained on the basis of the simulation. The loading process is taken as a random process, and the cumulative distribution function of the equivalent load of random load is deduced. The dynamic and time-varying reliability model of gear transmission system of wind turbine is built on the system level based on the stress-strength interference theory. The factors of strength degradation and dependent failure are included the model and the rule for the impact of the strength degradation and dependent Failure on the dynamic reliability of gear transmission system of wind turbine is researched. The research results lay a foundation for dynamic design and optimal reliability design of gear transmission system of wind turbine.

Key words: dependent failure, dynamic reliability, gear transmission system, strength degradation, wind turbines

中图分类号:

TK83

周志刚, 徐芳. 考虑强度退化和失效相关性的风电齿轮传动系统动态可靠性分析[J]. 机械工程学报, 2016, 52(11): 80-87.

ZHOU Zhigang, XU Fang. Dynamic Reliability Analysis of Gear Transmission System of Wind Turbine Considering Strength Degradation and Dependent Failure[J]. Journal of Mechanical Engineering, 2016, 52(11): 80-87.

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考虑强度退化和失效相关性的风电齿轮传动系统动态可靠性分析

Dynamic Reliability Analysis of Gear Transmission System of Wind Turbine Considering Strength Degradation and Dependent Failure

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