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采用基于广义概率密度演化方程的极值概率密度理论,该文研究了近海风力发电高塔在随机波浪作用下的动力可靠度问题。波场由基于拟层流风波生成机制的随机Fourier海浪谱及线性波浪理论模拟,确定性结构动力响应由有限元模型分析给出。结果表明:采用极值概率密度理论可以方便地计算出不同阈值水平下塔顶侧移的动力可靠度,采用经典的Poisson模型计算的动力可靠度随阈值水平的降低而误差增大。
Based on the theory of extreme probability density based on generalized probability density evolution equation, this paper studies the dynamic reliability of offshore wind power tower under random wave. The wave field is modeled by a random Fourier wave spectrum and a linear wave theory based on the pseudo-laminar wind generation mechanism. The deterministic structural dynamic response is given by the finite element model analysis. The results show that the dynamic reliability of the lateral displacement of the tower under different threshold levels can be easily calculated by using the extreme probability density theory. The dynamic reliability calculated by the classical Poisson model increases with the decrease of the threshold level.