雷暴冲击风作用下风力发电机动力响应参数  

Dynamic response parameters of wind turbine under thunderstorm downburst

作　　者：刘春城[1] 滕庆训 Chuncheng LIU;Qingxun TENG(School of Civil Engineering and Architecture,Northeast Electric Power University,Jilin 132012,Jilin,China)

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012

出　　处：《山东大学学报（工学版）》2023年第6期108-121,共14页Journal of Shandong University（Engineering Science）

基　　金：吉林省自然科学基金资助项目(20230101218JC);国家自然科学基金资助项目(51278091)。

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。In order to study the time-domain characteristics of the impact wind of mobile thunderstorms and the characteristics of the dynamic response parameters of wind turbines under their action,the wind speed time history of the impact wind of mobile thunderstorms was first simulated using the harmonic superposition method.The finite element model of fan structure considering the coupling effect of blade and tower tube was established,and then the response distribution laws of acceleration,displacement,section stress and shear force along the height direction of tower tube were obtained.The acceleration and displacement responses of the blades and the tower were further analyzed considering the different blade stall angles when the fan was stopped.Considering the influence of different wind directions on the wind turbine,the frequency domain characteristics of the dynamic response were analyzed,and the variation patterns of vibration mode participation coefficient,tower top displacement and acceleration,and tower bottom bending moment amplitude with frequency were given.Research showed that the wind speed time history of a moving thunderstorm impact wind included two distinct peaks(0-T/3,T/3-T/2).The variation of the displacement response peak at different blade stop angles was closely related to the height of the location.The frequency of thunderstorm impact wind load and the first order dominant frequency(around 0.230 Hz)had a significant impact on the structural displacement and section bending moment amplitude.

关 键 词：雷暴冲击风 风力发电机 塔筒 风速时程 动力响应 

分 类 号：TU311[建筑科学—结构工程]