大兆瓦风力发电机组运行载荷与地震激励共同作用下的结构响应分析
Structural response analysis of large MW wind turbine under the combined action of operating load and seismic excitation
刘嘉琳 1史久畅 1张林中 1韩新月1
作者信息
- 1. 国电联合动力技术有限公司,北京 100039
- 折叠
摘要
风电机组在其全寿命服役期间持续受到风作用的同时会不可避免地遭受地震作用.文章以某大兆瓦风电机组作为研究对象,对其分别在正常运行、停机时发生地震和运行时发生地震情况下的结构变形和力学响应进行模拟分析.结果表明:风电机组变形随着塔筒高度的增加而增大,仅在地震作用下的水平位移明显小于风电机组运行状态;风电机组水平位移随着地震水平的增大而增大,且变形形态不变,越靠近塔顶,变形越明显;风电机组运行载荷对结构变形响应的影响明显大于小震和中震作用;此外,运行载荷和地震共同作用下的风电机组变形响应明显大于两种荷载单独作用下的变形响应的简单叠加,在风电机组的结构设计中,需考虑运行状态和地震激励的耦合作用;塔顶处应力响应最大,在设计中应对其截面进行重点验算.
Abstract
The wind turbines are subjected to continuous wind loads during their whole service life and are inevitably resisted earthquake action.In this paper,a large megawatt wind turbine is taken as the research object to simulate and analyze its deformation and mechanical responses under the conditions of normal operation,earthquake during shutdown and earthquake during operation.The results show that the deformation of wind turbine increases with the increase of tower height,and the horizontal displacement of the wind turbine under the earthquake is obviously less than that under the wind turbine operation state.With the increase of earthquake level,the horizontal displacement of the wind turbine is gradually increased.The deformation shape of the wind turbine remains unchanged,and the deformation of tower top is large.The influence of the wind turbine operating load on structural deformation response is significantly greater than that of small and medium earthquake actions.Meanwhile,the deformation response of the wind turbine under the combined action of operating load and earthquake is significantly greater than that under the separate action of two loads.In the structural design of the wind turbine,it is necessary to consider the coupling effect of the operating state and the earthquake.The stress response at the top of the tower is the largest,and its cross-section should be checked in the design.
关键词
风力发电机组/运行载荷/地震作用/变形响应/力学响应Key words
wind turbine/operating load/earthquake action/deformation response/mechanical response引用本文复制引用
基金项目
国家重点研发计划项目(2020YFN1506700)
国家能源集团联合动力技术有限公司科技创新项目(LHDL-2021-02)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据