海上三桩风机基础简化及荷载响应对比分析  

Simplification and load response analysis of offshore wind turbine tripile foundation

作　　者：康海贵[1] 莫仁杰[1] 龙丽吉[1] 李明伟[1] 

机构地区：[1]大连理工大学港口、海岸及近海工程国家重点实验室,辽宁大连116024

出　　处：《可再生能源》2014年第5期609-618,共10页Renewable Energy Resources

基　　金：国家自然科学基金(41206075);中国水电顾问集团华东勘测设计研究院合作项目(201102124)

摘　　要：三桩基础（Tripile Foundation）是一种新型的海上风机支撑结构，广泛适用于地质相对复杂、水位较深的风场。文章理论分析了海上风机基础桩一土相互作用简化方法，运用ANSYS建立3维有限元模型，考虑不同种地基约束简化方法，对单机3MW三桩基础在不同方向极限荷载作用下进行数值分析。结果表明：三根桩非平均承担结构荷载，不同方向荷载作用结构响应呈规律性变化，荷载为0°方向时结构位移最大，荷载为20～30°方向时结构应力最大。实际工程计算时，需运用不同简化模型进行对比校核，重点考虑基础单桩主受拉、单桩主受压及20～30°荷载方向。A new-style foundation for offshore wind turbines, tripile foundation can be widely used inwind farms,where geology condition is relatively complicated and water is relatively deep. In this pa-per,simplified methods of the pile-soil interaction （PSI） for offshore wind turbines were analyzed the-oretically. Three dimensional finite element models of 3 MW tripile foundation were established usingANSYS for the numerically analysis of load response to the ultimate load with different directions,anddifferent foundation simplified methods were considered. The results show that tripile foundation canbear the structure load unequally, the responses are regular due to the change of load direction. Whenthe load angle is 0 °, displacement of the structure turns to be maximum, however maximum structurestress appears on the load angle of 20-30 °. In practical project, different PSI models are needed to getthe true response of the foundation, and structural analysis should focused on three state of the foun-dation, single pile tension, single pile compressed, and load angle of 20-30°.

关 键 词：海上风机 三桩基础 简化模拟 结构响应 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]