论文部分内容阅读
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 dynamic model of 1.5MW wind turbine flexible multibody system was established by ANSYS. The natural frequencies of the system and its components were calculated. The resonance and stability of the system were analyzed, and the influencing factors of the system stability were considered. The results show that the tower is a flexible tower, and the wind turbine can operate safely and stably at the operating speed. The height-diameter ratio of the tower has a significant influence on the stability of the system. The influence of the azimuth of blade rotation on the modal frequency of the complete machine ignore. Finally, the vibration response of wind turbine system components under wind load excitation is analyzed. The results show that the blade tip vibration is more complicated than other components due to the different stiffness of the components, and the tip vibration is the result of the elastic deformation of the three blades and the tower due to the wind load.