风力发电塔筒在地震和风载下的失效分析-《焊管》

文章信息/Info

Title:: Failure Analysis of Wind Turbine Tower under Earthquake and Wind Loads

作者:: 徐凯; 张锦刚; 李周波; 王和平; 马璇编译; 1. 中油国家石油天然气管材工程技术研究中心有限公司，西安710018； 2. 宝鸡石油钢管有限责任公司，陕西宝鸡721008

Author(s):: Translated by XU Kai; ZHANG Jingang; LI Zhoubo; WANG Heping; Ma Xuan; 1. Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods Co., Ltd., Xi’an 710018, China; 2. Baoji Petroleum Steel Pipe Co., Ltd., Baoji 721008, Shaanxi, China

摘要:: 为了研究1.5 MW水平轴风力发电机塔筒在强地震和风力载荷作用下的结构响应和失效模式，根据抗震规范中的两条设计响应图谱选定地震运动的形式和规模，同时根据热带气旋设定风力载荷，对研究模型进行了非线性动力学响应分析，并比较了在风力载荷作用下，塔筒在短周期和长周期地震载荷下的结构性能。结果表明，在强风力载荷作用下，风机塔筒的失效是由塔筒下部塑性铰的形成引起的，这一区域在塔筒承受较大的地面载荷时也是十分关键的。但在一些短周期地震中，由于高阶振动模态的叠加，最终导致塔筒中上部出现失效。虽然长周期的地震往往会导致更严重的结构响应，但是短周期的地震可能会直接导致脆性断裂，在这种模式下，只有中等耗散功率的塔筒全塑性铰会快速发展。基于以上研究结果，对风机塔筒提出了相关的设计建议。

Abstract:: In order to study the structural response and failure modes of the 1.5 MW horizontal axis wind turbine tower under strong earthquake and wind loads, the form and scale of earthquake were selected based on the two design response spectra in the seismic code. Meanwhile, the wind load was set based on tropical cyclones, and the nonlinear dynamic response analysis of the research model was conducted, structural performance of tower drums under short and long period earthquake loads. The results show that under strong wind loads, the failure of the wind turbine tower is caused by the formation of plastic hinges at the bottom of the tower, which is also crucial when the tower is subjected to large ground loads. However, in some short?eriod earthquakes, due to the superposition of higher?rder vibration modes, the upper and middle portions of the tower eventually fail. Although long period earthquakes often lead to more severe structural responses, short period earthquakes may directly lead to brittle fracture. Under this mode, only moderately dissipative power plastic hinges on the tower barrel will develop rapidly. Based on the research results above, relevant design suggestions for the fan tower are proposed.