摘要
在模拟实际风速变化的基础上,得到随机风引起的风力发电机传动系统外部载荷激励,应用集中质量方法建立风力发电机传动系统齿轮-轴承耦合的动力学模型,并对动力学模型进行仿真计算,得到各齿轮副的动态啮合力和滚动轴承动态接触力。在此基础上,将载荷作用过程描述为随机过程,求得载荷作用效应等效载荷的累积分布函数和概率密度函数,将强度描述为随机变量,应用应力-强度干涉模型,建立考虑失效相关性的风力发电机齿轮传动系统动态可靠性模型,计算系统的动态可靠度和失效率,研究风力发电机齿轮传动系统可靠度和失效率随时间变化规律,为风力发电机齿轮传动系统动态可靠性优化设计和稳健性设计奠定基础。
The time-varying wind load caused by stochastic wind speed is obtained on the basis of simulating actual wind speed change, and a dynamic model of wind turbine planetary gear system coupling with bearing is built under varying wind load using lumped-parameter method, the model includes the varying wind load, time-vary mesh stiffness of gear pair and time-vary stiffness of rolling element bearing. The numerical method is used to simulate the planetary gear transmission system and the vibration displacement responses of the transmission system as well as dynamic meshing force each pair of gear and nonlinear bearing forces are obtain. Based on the above, viewing the loading action process as random process, the cumulative distribution function and the probability density function of the equivalent load of load effect are derived. Describing strength as random variables, the reliability model of the gear transmission system of wind turbines with dependent failure is built using the stress-strength interference model, and the change laws with time of reliability and failure rate of gear transmission system of wind turbine are studied. This research results lay a foundation for dynamic reliability optimization design and robust design of gear transmission system of wind turbine.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2013年第7期1212-1219,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50975294)
关键词
风力发电机
齿轮传动系统
失效相关
动态可靠性
wind turbines
gear transmission system
dependent failure
time-dependent reliability
