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.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
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)
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
wind turbine compliance multi-body system
natural frequency
stability analysis
dynamic response
