| 海上风电单桩式支撑结构冰激振动及参数敏感性分析 |
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| 引用本文： | 王宾,李红涛,刘嵩,万德成.海上风电单桩式支撑结构冰激振动及参数敏感性分析[J].海洋工程,2020,38(3):94-101. |
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| 作者姓名： | 王宾 李红涛 刘嵩 万德成 |
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| 作者单位： | 中国船级社海洋工程技术中心, 天津 300457;上海交通大学 船舶海洋与建筑工程学院, 上海 200240 |
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| 摘 要： | 针对渤海湾某风电场的海上固定式风机支撑结构,采用适用于大直径单桩结构的PSI曲线模拟桩土相互作用,并采用SACS软件建立支撑结构的动力分析模型。首先对支撑结构进行模态分析;其次考虑海冰结构的随机振动作用模式,根据适用于渤海湾的随机冰力谱构造随机冰载荷时程曲线,基于半耦合的时域方法,采用SACS软件对支撑结构进行冰激振动分析,输出塔筒顶部加速度、单桩基底剪力及倾覆力矩等响应参数的时程曲线和响应功率谱;最后针对冰厚、冰速和海冰强度等海冰参数对支撑结构的冰激振动进行敏感性分析。研究结果表明,在随机振动模式下,冰载荷及结构动力响应对冰厚和海冰强度较为敏感,在进行冰激振动分析时应合理确定冰厚和海冰强度等参数。
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| 关 键 词： | 固定式风机 单桩 支撑结构 修正的PSI曲线 随机冰载荷 冰激振动 敏感性分析 |
| 收稿时间： | 2019/6/13 0:00:00 |
Ice-induced vibration and parameter sensitivity analysis for a monopile supported offshore wind turbine |
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| WANG Bin,LI Hongtao,LIU Song,WAN Decheng.Ice-induced vibration and parameter sensitivity analysis for a monopile supported offshore wind turbine[J].Ocean Engineering,2020,38(3):94-101. |
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| Authors: | WANG Bin LI Hongtao LIU Song WAN Decheng |
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| Institution: | Offshore Engineering Technology Center of CCS, Tianjin 300457, China;School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | A dynamic analysis model is established for ice-induced vibration analysis of the bottom-fixed wind turbine in Bohai Bay. The PSI curves applied for the large diameter of monopile are used for simulating the interaction between pile and soil by using the SACS software. Modal analysis of vibration response is performed. A spectral density function is used for obtaining the dynamic ice forces on vertical offshore structure. Ice-induced vibrations of the support structure of the bottom-fixed wind turbine are developed with the semi-coupled time domain method. Therefore, accelerations of the top of the tower, base shears and overturning moments of the monopile are calculated in time domain. Besides, a serious of sensitivity analysis of the support structure is obtained with respect to the ice parameters of thickness, velocity and strength. The results show that the ice load and structural dynamic response are sensitive to ice thickness and sea ice strength under random vibration. The ice thickness and sea ice strength should be reasonably determined in ice-induced vibration analysis. |
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| Keywords: | bottom-fixed wind turbines monopile support structure modified PSI random ice loads ice-induced vibration sensitivity analysis |
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