单桩基础海上风机受船撞击损伤和动力响应分析  

Damage and dynamic response analyses of offshore wind turbine with monopile foundation subjected to ship impact

作　　者：郝二通 柳英洲 柳春光[1] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]辽宁工程技术大学建筑工程学院,辽宁阜新123000

出　　处：《大连理工大学学报》2014年第5期551-557,共7页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(51178079);国家自然科学基金重大研究计划资助项目(90915011);"九七三"国家重点基础研究发展计划资助项目(2011CB013605-4)

摘　　要：随着海上风机在服役期内被船舶撞击风险提高,运用LS-DYNA软件进行了5 000t船舶以2m·s-1速度撞击单桩基础海上风机的数值仿真.提出面积受损率描述海上风机单桩基础的受损程度,分析了风机塔架易损位置的位移、加速度响应及剪力.结果显示:船舶正撞风机以塑性碰撞为主;面积受损率能合理反映单桩基础在不同质量、速度、碰撞角度船舶撞击下的受损程度,其与船舶动能具有一一对应关系;风机塔架位移响应随塔架高度增加而增强,加速度响应却减弱;塔架顶部剪力最大值同底部一样均很大,所以加强塔架顶部连接同加强底部连接一样重要.With the increase of the risk of offshore wind turbine stricken by a ship during the service period,offshore wind turbine with monopile foundation impacted by a 5 000 t ship at 2 m · s-1 is numerically simulated by using LS-DYNA.Damage rate of area,describing the damage degree of monopile foundation for offshore wind turbine, is proposed. The displacement and acceleration response and shearing force of vulnerable point at tower are analyzed.The analytical results indicate that the plastic collision is maj or part for ship-offshore wind turbine collision;damage rate of area can reasonably reflect the damage degree of monopile foundation stricken by a ship with different masses, velocities and collision angles,and there is a monogamy between damage rate of area and kinetic energy of ship;the displacement response is enhanced with increase of tower height,but acceleration response is reduced;the maximum shearing force at the top of tower is as large as that at the bottom. Therefore,it is equally important to take safety measures to strengthen the top of tower as it is to the bottom.

关 键 词：海上风机 单桩基础 碰撞 面积受损率 加速度 剪力 

分 类 号：TU473.1[建筑科学—结构工程] TM614[建筑科学—土工工程]