【摘要】 因风电塔整体结构不沿轴向对称,为明确该结构的受力特性和保证结构安全,采用国外及国内两种数值计算方法对塔筒结构进行了研究,分析风荷载作用下、地震动作用下和风–地震组合作用下的塔体结构的受力差异.在此基础上对塔筒结构进行风–地震组合作用下的不同地震动输入方向的动力响应分析进行研究.结果指出了该状态下对塔筒结构最不利的地震动输入方向以及该作用条件下塔筒结构的薄弱位置为塔筒开口位置.更多还原

【Abstract】 With the increasing of wind power generation facilities,structure safety is particularly important in the service of wind power towers.Wind power towers are a typical top-heavy structure which is similar to a kind of thin-wall cylindrical structure.The supporting structure of a wind power tower is forced under the pressure of the upper engine room,rotor and blades,the side of the tower is thrust by ocean wind,and when earthquakes happen the tower undergoes the horizontal and vertical seismic action.Since the whole structure of the tower is asymmetric,in order to clarify the mechanical characteristics and ensure the structure safety,the tower structure was studied by foreign and domestic numerical calculation methods.The differences in force of the tower structure were analyzed under wind load only,earthquake load only and the wind-earthquake load combination case.Then the dynamic responses of the tower structure were performed under the combined action of wind and earthquake load with different earthquake input directions.The results pointed out the earthquake input direction which is most disadvantageous to the tower structure and the weak position of the tower structure is door opening location under this condition.更多还原