近海风力发电高塔波浪随机动力响应分析  

Dynamic responses of offshore wind turbines subjected to random waves

作　　者：徐亚洲[1] 李杰[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]同济大学土木工程学院,上海200092

出　　处：《振动工程学报》2011年第3期315-322,共8页Journal of Vibration Engineering

基　　金：国家自然科学基金委创新研究群体(50621062);"十一五"国家科技支撑计划(200611A023);上海市科委"登山行动计划"资助项目(06DZ12205)

摘　　要：基于拟层流风波生成机制建立的随机Fourier海浪模型,采用概率密度演化理论研究了近海风力发电高塔在随机波浪作用下的动力响应问题,给出了结构响应概率密度函数的时间演化过程、概率密度等值线图及其均值和标准差。其中随机波浪力由线性波浪理论和M orison公式计算。结果表明,概率密度演化方法可以获得结构波浪动力响应的时变概率密度函数和等概率密度响应轨迹。据此计算的均值及标准差与M on te C arlo计算结果吻合较好。Based on stochastic Fourier model of ocean wave,which originates from quasi-laminar wind-wave generation mechanism,probability density evolution method（PDEM） is employed to investigate dynamic response of an offshore wind turbine tower subjected to random wave,and probability density evolution process of the responses,response track with equal probability density function value,mean and standard deviation are presented.Linear wave theory and Morison equation are used to estimate time history of wave forces.The results indicate that PDEM can present time-variant probability density function and response track with the equal probability density function value.The mean and standard deviation calculated by PDEM have a good agreement with ones in terms of Monte Carlo method.

关 键 词：随机动力响应 近海风机塔 概率密度演化 随机Fourier海浪模型 

分 类 号：TV139.2[水利工程—水力学及河流动力学]