摘要
首先采用雨流计数法统计分析单一工况载荷幅值、均值的循环作用次数，根据相关系数优化法得到单一工况载荷幅值的概率分布函数，同时通过波动中心方法获得单一工况载荷均值的波动中心；再采用加权方式确定多工况载荷幅值的复合概率分布函数以及载荷均值的总波动中心。将载荷幅值作用次数扩展为10^6次，进而得到载荷幅值不等距8级载荷谱，将该幅值的8级载荷谱叠加于均值的总波动中心编制成风电轴承多工况试验载荷谱。试验载荷谱既保留了多工况原始工作载荷的母体特性，又使轴承的试验加载成为可能。
Firstly, the multi -operating loads are analyzed by rain flow counting method, and the amplitude and mean with corresponding cycles of each operating load are obtained. Secondly, the probability distribution function of the amplitude of each operating load is inferred by optimizing correlation coefficient, and the mean＇s wave center of each operating load is calculated. Then the combined probability distribution function and main wave center of multi - operating loads are determined by weighted coefficient. The cycles of the amplitude are expanded to 106 , then the eight levels and unequally spaced intervals load spectrum of the amplitude is compiled, and the final load spectrum of wind turbine bearing with multi - operating loads is got by adding the amplitude to the main wave center. The final load spectrum keeps characters of the multi - operating loads.
出处
《轴承》
北大核心
2011年第10期21-25,30,共6页
Bearing
基金
国家自然科学基金资助项目(51005031)
"八六三"计划资助项目(2009AA044901)
关键词
风电轴承
载荷谱
雨流计数
多工况载荷
wind turbine bearing
load spectrum
rain flow counting
multi -operating load
