吸力式筒形基础沉贯过程屈曲特性数值分析  

Numerical analysis of buckling characteristics of suction caisson foundation during penetration

作　　者：任彦忠 赵学亮[3] 李扬扬 隋淑环 宋启明 游先辉 REN Yan-zhong;ZHAO Xue-liang;LI Yang-yang;SUI Shu-huan;SONG Qi-ming;YOU Xian-hui(Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,China;China Guangdong Nuclear New Energy Holdings Co.Ltd.,Beijing 100070,China;Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education,Southeast University,Nanjing 211189,China;Fujian Yongfu Power Engineering Co.Ltd.,Fuzhou 350001,China)

机构地区：[1]华北电力大学河北省低碳高效发电技术重点实验室,河北保定071003 [2]中国广核新能源控股有限公司,北京100070 [3]东南大学混凝土及预应力混凝土结构教育重点实验室,江苏南京211189 [4]福建永福电力设计股份有限公司,福建福州350001

出　　处：《兰州理工大学学报》2025年第2期135-142,共8页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(52378329,51878160,51678145)。

摘　　要：吸力式筒形基础是海上风力发电采用的一种新式基础,具有高效经济的优点,但其安装过程面临筒壁屈曲失效的风险,目前行业尚缺乏针对该问题的规范和标准.通过分析当前行业内常用的参考规范和标准,剖析参考的规范、标准在用于吸力筒的设计时存在着边界条件假设不相符的问题.采用有限元数值模拟方法,分析了砂土中土体及桶盖对边界条件的影响,并将分析结果与各规范方法计算结果进行对比验证.通过拟定受屈曲失效控制的允许沉贯吸力包络线,为实现更加安全合理的吸力式筒形基础设计提供帮助.Suction caisson foundation is a new type of foundation adopted by offshore wind turbine due to its advantages of high efficiency and economy.But there is a risk of buckling failure of cylinder wall during the installation.So far,there is still a lack of specifications and standards for this problem in the industry.In this paper,the commonly used reference codes and standards in this industry were collected and analyzed.A problem that the current reference codes and standards are inconsistent with the assumptions of boundary conditions is found in the design of suction caisson.The influence of soil and barrel cover on boundary conditions was simulated and analyzed by finite element method.And the numerical results were compared with the calculation results from various standard methods.Finally,the allowable penetration suction envelope controlled by buckling failure was provided,which is supposed to be helpful for the design of suction foundation.

关 键 词：吸力式筒形基础 临界屈曲应力 有限元模拟 边界条件 

分 类 号：TU411[建筑科学—岩土工程]