基于结构参数影响的风力机柔性多体系统的动力响应  

DYNAMIC RESPONSE OF WIND TURBINE COMPLIANCE MULTI-BODY SYSTEM BASED ON INFLUENCE OF STRUCTURE PARAMETER

作　　者：刘旺玉[1] 苏章明[1] 陈龙[1] 张勇[1] 张鑫[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《太阳能学报》2012年第7期1088-1093,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50975090)

摘　　要：采用ANSYS建立了1.5MW风力机柔性多体系统动力学模型,计算了系统及其各部件的固有频率,对系统的共振和稳定性进行了分析,并考虑了系统稳定性的影响因素。结果表明:塔架为柔塔,在工作转速下风力机能够安全、稳定运转;塔架的高径比对系统稳定性有明显影响,而叶片旋转方位角变化对整机模态频率的影响可忽略。最后分析了风力机系统各部件在风载荷激励下瞬态响应振动情况。结果表明由于各部件刚度不同,使得叶片叶尖振动较其他部件复杂,叶尖振动是受风载作用的三叶片与塔架弹性变形相互耦合作用的结果。The compliance multi-body system modeling with about 1.5MW wind turbine was established by ANSYS finite element software, the natural frequencies of wind turbine system and its components were calculated, and the resonance and stability of the system were also analyzed, then the effect factor of system stability was considered. The results indicated that the tower is flexible ; the system is stable and safe at the working rotational velocity; the height-diameter ratio of tower has important effect on system stability, but the effect of blade azimuth on natural fre- quency of wind turbine system is neglect. Finally the components of wind turbine system transient responses were considered under gust loading spectrum. The results showed that because of different stiffness of each component, the blade tip vibrate is more complex than other components, and the tip vibration is induced by coupling effect, which is produced by the elastic deformations between three blades and tower with enduring wind loads.

关 键 词：风力机柔性多体系统 自然频率 稳定性分析 动态响应 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]