摘要
为了得到桶基础承受风、浪动荷载的承载性能,结合我国东海地质条件,统计中国东海2010—2020年浅、深海风速和最大海浪数据,通过计算得到风浪荷载并制成ABAQUS软件幅值曲线施加到海上风电吸力桶基础上,分析了吸力桶基础在动荷载作用下的承载特性。结果表明:吸力桶基础受风、浪荷载影响明显,桶基础迎力面受到风浪动荷载产生拉拔现象。在浅海区,桶基础在风浪荷载作用下桶身自上而下变形不协调,风浪荷载最大的10月份桶基础迎力面最大位移超出了规范0.02D的限制,基础失稳;桶基础背力面受压变形较小。在深海区,桶基础在风浪荷载作用下桶身自上而下变形相对协调,施加风浪荷载后桶体迎力面最大位移为14.9 mm,整体上迎力面位移比背力面位移大4 mm,桶体处于稳定状态。相较浅海区的吸力桶单桶结构,深海区吸力桶结构由于尺寸增加,桶体的稳定性得到提高,说明吸力桶结构的尺寸对稳定性起决定性作用。
In order to study the bearing performance of bucket foundation under wind and wave dynamic loads,the wind and wave loads were calculated by using the statistics of wind speed and maximum wave in both shallow and deep seas from 2010 to 2020 combined with the geological conditions of the East China Sea.These loads were made into the amplitude curve of ABAQUS software,and applied to the offshore wind power suction bucket foundation.Furthermore,the bearing characteristics of suction bucket foundation under dynamic load were analyzed.The wind and wave loads from the results show obvious influence on the suction bucket foundation,particularly the pull-out phenomenon was caused on the head-on force face of suction bucket foundation by wind and wave dynamic loads.In the shallow sea,the deformations of the bucket foundation from top to bottom were inconsistent under the wind and wave loads.In October,when the wind wave loads were the largest,the maximum displacement of the head-on force face of the bucket foundation exceeded the limit of 0.02D in the specification,and it is considered that the foundation was unstable;the pressure deformation of the back-on force face of the bucket foundation was a little.In the deep sea,the deformation of the bucket foundation from top to bottom was relatively consistent under the wind wave load.After the wind and wave loads were applied,the maximum displacement of the head-on force face of the bucket was 14.9 mm.The overall displacement of the head-on force face was 4 mm larger than that of the back-on force face,and it is considered that the foundation was stable.Compared with the single suction bucket in the shallow sea,the stability of bucket foundation in the deep sea was improved due to the increase in the size of the structure,which shows that the size of suction bucket structure played a decisive role in the stability.
作者
秦天庆
袁长丰
袁铭徽
王滨
甄卓
姜志伟
QIN Tianqing;YUAN Changfeng;YUAN Minghui;WANG Bin;ZHEN Zhuo;JIANG Zhiwei(School of Civil Engineering,Qingdao University of Technology,Qingdao 266520,China;Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province,Hangzhou 310014,China)
出处
《海洋工程》
CSCD
北大核心
2023年第1期169-178,共10页
The Ocean Engineering
基金
国家自然科学基金资助项目(52071301,51909238,51939002)
浙江省深远海风电技术研究重点实验室开放基金(ZOE2020006)。
关键词
海上风电
吸力桶基础
风浪荷载
承载性能
数值模拟
offshore wind power
suction bucket foundation
wind wave load
bearing capacity
numerical simulation
