摘要
针对大型风电塔筒在风轮激励下容易发生共振、导致塔筒结构受损的问题,结合风力塔筒的结构特点及受力特征进行仿真分析。通过建立有限元模型进行静力学分析和模态分析,分别确定了塔筒的最大应力、塔顶位移和固有频率及振型。结果表明:塔筒的应力、位移均符合安全要求,而风轮的激励频率和塔筒的固有频率接近会导致结构发生共振。需对结构进行优化,并通过统计、分析系统各参数对优化目标的敏感度,以及系统输入参数对优化目标的反应等制定了优化方法,经优化后风电塔筒的固有频率从0.84039 Hz提高到1.1016 Hz,从而实现了优化目的。
Aiming at the problem that large-scale wind power towers are prone to resonate under the excitation of wind wheels which results in the damage to the tower structure,simulation analysis is carried out based on the structural characteristics and force characteristics of the wind tower.By establishing a finite element model for static analysis and modal analysis,the maximum stress,top displacement,natural frequency and mode shape of the tower are determined.The results show that the stress and displacement of the tower meet the safety requirements,and when the excitation frequency of the wind wheels and the natural frequency of the tower are close,the resonance of the structure occurs.The structure needs to be optimized,and the optimization method is formulated through statistics and analysis of the sensitivity of the system parameters to the optimization target,and the response of the system input parameters to the optimization target.The result shows that the natural frequency of the wind turbine tower after optimization is increased from 0.84039 Hz to 1.1016 Hz,thus the optimization is achieved.
作者
侯梦楠
胥光申
孙戬
刘晖
成小乐
王新可
HOU Mengnan;XU Guangshen;SUN Jian;LIU Hui;CHENG Xiaole;WANG Xinke(Collegeof Mechanical and Electrical Engineering,Xi'an Polytechnic University,Xi'an 710048,China;Baqiao Thermal Power Plant,Datang Shaanxi Power Generation Co.,Ltd.,Xi'an 710065,China)
出处
《机械》
2022年第3期58-64,共7页
Machinery
基金
陕西省重点研发计划(2018GY-130,2019GY-119)
西安市现代智能纺织装备重点实验室(2019220614SYS021CG043)
陕西省教育厅服务地方专项计划(19JC019)。
关键词
风电塔筒
静力学分析
模态分析
结构优化
wind power tower
statics analysis
modal analysis
structure optimization
