风力发电高塔系统抗风动力可靠度分析

Dynamic Reliability Analysis of Wind Turbine Systems Subject to Wind Loads

摘要:

介绍一种基于广义概率密度演化理论的动力可靠度分析方法.结合随机脉动风场物理模型和“桨叶机舱塔体基础”一体化有限元模型,分别分析1.25 MW风力发电钢塔和钢筋混凝土风力发电高塔的抗风动力可靠度.研究表明,广义概率密度演化方法可以有效地分析风力发电高塔系统抗风动力可靠度.相比风力发电钢塔,钢筋混凝土风力发电高塔具有更高的可靠度.

Abstract:

The paper first presents a new dynamic reliability evaluation method based on generalized probability density evolution method (GPDEM).Then,the dynamic reliability of 1.25 MW steel wind turbine system and reinforced concrete wind turbine system is evaluated separately in combination with the physical model of stochastic wind field and the integrated finite element model consisting of the rotor,the nacelle,the tower and the foundation.The results show that the dynamic reliability of wind turbine systems can be worked out by the proposed method.Besides,the concrete wind turbine system is of a higher reliability than the steel one.