海上风电裙式吸力基础水平变幅非对称循环承载特性  

BEARING BEHAVIORS OF MODIFIED SUCTION CAISSON UNDER HORIZONTAL VARIABLE AMPLITUDE AND ASYMMETRICAL CYCLIC LOADS FOR OFFSHORE WIND TURBINES

作　　者：李大勇 黄凌昰 吴宇旗 张景睿 Li Dayong;Huang Lingxia;Wu Yuqi;Zhang Jingrui(School of Civil Engineering of Fuzhou University,Fuzhou 350108,China;College of Pipeline and Civil Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]福州大学土木工程学院,福州350108 [2]中国石油大学(华东)储运与建筑工程学院,青岛266580

出　　处：《太阳能学报》2023年第10期391-399,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51879044);自主创新科研计划(22CX06021A);青岛博士后应用研究项目(qdyy20210091)。

摘　　要：针对海上风电在深海区域所受风、波浪等循环荷载作用特征,进行裙式吸力基础水平非对称循环加载模型试验,探究非对称循环荷载幅值大小、循环次序和对称性等因素对其累积位移及转角变化的影响规律。结果表明:逐阶增大的变幅循环加载时,裙式吸力基础在幅值比低、循环次数少(Δζ_(b)=0.1,N=500)的情况下产生的累积位移和转角大于幅值比高、循环次数多(Δζ_(b)=0.2,N=1000)的情况;非对称循环加载(ζ_(c)=-0.3)时,裙式吸力基础的累积位移与转角较对称加载时呈增长趋势;完全双向加载(ζ_(c)=-1.0)时,吸力基础的累积位移与转角在变方向后相比单向循环加载的情况下降1/3。相同变幅和非对称加载情况下,裙式吸力基础的累积位移和转角仅为传统吸力基础的50%。A series of horizontal cyclic loading(resulted from wind and waves in deep sea)model tests on modified suction caissons(MSCs)are conducted under variable amplitude and asymmetrical cyclic loads.The factors concerned with cumulative displacement and rotation,such as amplitude,number of cycles,cyclic order,asymmetry(two-way)are discussed.The results show that the cumulative displacement and rotation of MSCs with a small amplitude increment and number of cycles(Δζ_(b)=0.1,N=500)are greater than that with a larger amplitude increment and number of cycles(Δζ_(b)=0.2,N=1000)under progressively increased cyclic loading;under asymmetric loading(ζ_(c)=-0.3),the cumulative displacement and rotation of MSCs tend to increase compared with that under symmetric loading;under fully two-way loading(ζ_(c)=-1.0),the cumulative displacement and rotation of MSCs decrease by 1/3 compared with that under unidirectional cyclic loading after changing the direction.The cumulative displacement and rotation of MSCs are 50%of regular suction caissons(RSCs)under variable amplitude and asymmetrical cyclic loading.

关 键 词：海上风电 循环荷载 沉箱 非对称循环 累积转角 

分 类 号：P754[天文地球—海洋科学]