冲刷作用下大型单桩式风力机多物理场动力学响应分析
Multi-physics Dynamic Response Analysis of Large Monopile Wind Turbine under Scouring Effect
师浩东 1闫阳天 1岳敏楠 1李春1
作者信息
- 1. 上海理工大学 能源与动力工程学院,上海 200093
- 折叠
摘要
为研究冲刷及风-浪-地震载荷对大型海上风力机动力学响应的影响,建立了考虑土-构耦合效应的单桩支撑结构有限元模型,对风力机进行时域分析.结果表明:冲刷对风力机高阶模态影响更大;仅有风-浪载荷激励时,随冲刷深度增加,风力机塔架和桩基整个时程曲线不断上移,位移显著增加,塔架和桩基主要运动都发生在湍流风来流方向;在风-浪-地震载荷联合激励下,塔架和桩基动力学响应有所差异,当冲刷深度较小时,风力机塔架位移逐渐增加,但随着冲刷深度增加,塔架位移反而逐渐减小,而桩基位移随冲刷深度增加一直减小;风力机受风-浪-地震载荷作用下各冲刷深度塔架和桩基位移相较于风-浪载荷时都有所增加.
Abstract
In order to study the influence of scour and wind-wave-earthquake load on the dynamic re-sponse of large offshore wind turbine,a finite element model of monopile support structure considering soil-structure coupling effect was established to analyze the time domain of wind turbine.The results show that the scour has a greater impact on the high-order mode of the wind turbine;when only the wind-wave load is excited,with the increase of scour depth,the whole time history curve of wind turbine tower and pile foundation moves up continuously,the displacement increases significantly,and the main movements of both tower and pile foundation appear in the direction of turbulent wind flow;under the combined exci-tation of wind-wave-earthquake load,the dynamic responses of tower and pile foundation are different.When the scour depth is small,the displacement of wind turbine tower increases gradually,but with the increase of scour depth,the displacement of tower decreases gradually,and the displacement of pile foundation decreases with the increase of scour depth;under the action of wind-wave-earthquake load,the displacement of tower and pile foundation in different scour depths increases compared with that under wind-wave load.
关键词
海上风力机/基础冲刷/地震/土-构耦合/多物理场Key words
offshore wind turbine/foundation scour/earthquake/soil-structure coupling/multiphysics field引用本文复制引用
基金项目
国家自然科学基金(51976131)
国家自然科学基金(52006148)
国家自然科学基金(52106262)
上海市Ⅳ类高峰学科-能源科学与技术-上海非碳基能源转换与利用研究院建设项目()
出版年
2024
NETL
NSTL
万方数据