【摘要】 本文依据哈密顿原理建立了具有非线性弹性基础的海上风车塔架结构时域分析方程,采用完全离散法将振动方程离散化,运用线性滤波法的自回归技术模拟脉动风速时程,分析了空间与时间步长以及载荷频率对数值计算稳定性的影响.并对一海上风车进行了塔架结构的动力响应时程计算和基于一次超越的塔架结构动力可靠性计算,为海上风车结构塔架可靠性分析设计提供借鉴和参考.更多还原

【Abstract】 According to Hamilton’s principle,time-domain analysis equations were represented for the structure of offshore wind turbine which has a nonlinear elastic foundation.The equations were discreted based on fully discrete method.Wind velocity time history was numerically simulated by using auto-regressive technique of linear filtering method.It was emphasized on the influence which time step,space step and load frequency have on the stability of numerical calculation.Results are presented for the dynamic response time history and the first crossing reliability for offshore wind structure,which will provide a guide for the reliability analysis of offshore wind turbine.更多还原