风力机塔架-叶片耦合模型风致响应时域分析

基于风力机塔架-叶片耦合模型,采用改进的叶素-动量理论模拟了考虑平稳风修正、叶片旋转效应和空间相干性的风力机气动载荷,并基于有限元方法对该耦合模型进行了动力特性分析和风致响应时域计算.基于目标响应时程探讨了风力机塔架-叶片耦合系统在随机风荷载作用下的动力响应特性,并与不考虑叶片影响的风力机塔架风致响应进行对比分析.研究表明,在进行风力机的抗风设计时,应该考虑塔架-叶片的耦合作用.

Time-domain Analysis of the Wind-induced Responses of the Coupled Model of Wind Turbine Tower-blade Coupled System

Based on the wind turbine tower-blade coupled model, the modified blade element momentum was used to simulate the aerodynamic loads of wind turbine model, which considers the rotational effect caused by blades and blade-tower interaction. The wind turbine tower-blade coupled model considering the centrifugal force from rotational blades was established in finite element method, and the time-domain analysis of wind-induced responses of wind turbine tower-blade coupled model was carried out. Then, the dynamic response characteristics of the wind turbine system under stochastic wind loads were discussed on the basis of the calculated results and through the contrast with the wind-induced responses of a tower without the blades. It is proposed that the wind turbine tower-blade coupled model should be adopted in wind resisting design.