山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (6): 108-121.doi: 10.6040/j.issn.1672-3961.0.2023.080
Chuncheng LIU(),Qingxun TENG*()
摘要:
为了研究移动雷暴冲击风的时域特征及其作用下风力发电机动力响应参数的特点, 利用谐波叠加法模拟得到移动雷暴冲击风的风速时程; 建立考虑叶片和塔筒耦合作用的风机结构有限元模型, 得到沿塔筒高度方向加速度、位移、截面应力、剪力的响应分布规律; 考虑风机停机状态下不同叶片的停摆角度, 进一步分析叶片及塔筒的加速度、位移响应; 考虑不同风向角对风机影响, 分析动力响应的频域特性, 给出振型参与系数、塔顶位移及加速度和塔底弯矩的幅值随频率的变化规律。研究表明, 移动雷暴冲击风的风速时程包括2个明显的波峰(0~T/3、T/3~T/2), 不同叶片停摆角下位移响应峰值的变化与所在位置高度密切相关, 雷暴冲击风荷载频率和一阶主频(0.230 Hz左右)对结构位移和截面弯矩幅值影响明显。
中图分类号:
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