波流作用下深水长桩动力放大效应  

Dynamic Amplification Effect of Long File in Deep Water Under Wave-Current Action

作　　者：李伟 付殿福 张晖 赵战华[2] 李良坤 王朝阳 梁文洲 LI Wei;FU Dianfu;ZHANG Hui;ZHAO Zhanhua;LI Liangkun;WANG Zhaoyang;LIANG Wenzhou(CNOOC Research Institute Co.,Ltd.,Beijing 100010,China;China Ship Scientific Research Center,Wuxi 214082,Jiangsu,China)

机构地区：[1]中海油研究总院有限责任公司,北京100010 [2]中国船舶科学研究中心,江苏无锡214082

出　　处：《中国海洋平台》2025年第1期82-87,共6页China offshore Platform

基　　金：中国海洋石油有限公司科研课题“深水导管架开发南海陆坡油气田工程模式研究”(编号:CNOOC-YXKJ-SHENHA1-2021-01)。

摘　　要：以南海100 m深水长桩为对象,建立基于水池试验测试与验证的长桩流固耦合动力响应分析数值模型。开展深水长桩在波流载荷作用下的动力响应特征计算和分析。结果表明:由于水动力非线性影响,数值分析结果会不同程度地偏于保守;随机波浪引起长桩谐振效应带来的长桩纵向运动和动力放大系数均明显增大,而叠加流作用对长桩运动有显著的抑制作用,运动降低幅度约30%。A numerical model of fluid-structure coupling dynamic response analysis of a 100 m long pile in deep water in the South China Sea is established based on pool test and verification.The dynamic response characteristics of the long pile in deep water under wave and current loads are calculated and analyzed.The results show that:due to the hydrodynamic nonlinear effect,the numerical analysis results are somewhat conservative;the longitudinal motion and dynamic amplification coefficient of the long pile significantly increase due to the resonance effect caused by the random waves,while the superimposed flow significantly inhibits the motion of the long pile,and the motion decreases by nearly 30%.

关 键 词：长桩 放大系数 波流 谐振 数值模型 

分 类 号：P75[天文地球—海洋科学]