弯剪载荷作用下超大型浮体撑杆结构极限强度研究  

Ultimate strength of brace strut structure of VLFS under bending and shear loads

作　　者：赵南[1,2] 顾学康 李政杰[1,2] 李生鹏 纪肖[1,2] ZHAO Nan;GU Xue-kang;LI Zheng-jie;LI Sheng-peng;JI Xiao(China Ship Scientific Research Center,Wuxi 214082,China;Taihu Lake Laboratory of Deep Sea Technology and Science,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]深海技术科学太湖实验室,江苏无锡214082

出　　处：《船舶力学》2022年第9期1344-1353,共10页Journal of Ship Mechanics

基　　金：工信部高技术船舶科研项目([2019]357)。

摘　　要：超大型浮体结构在复杂海洋环境下承受多轴载荷共同作用,使得刚度较弱的撑杆结构极易发生破坏,从而影响整个浮体的安全和可靠性。为掌握撑杆两端浮体上下运动导致撑杆承受弯剪联合载荷作用下的结构极限承载能力,本文基于模型设计混合相似理论,进行弯剪载荷作用下撑杆结构极限强度试验模型设计,并开展模型试验研究。通过数值仿真方法与试验结果的对比分析,验证数值仿真方法的正确性,并给出弯剪作用下实际撑杆结构极限承载能力,为撑杆结构设计及超大型浮体安全性评估提供支撑。The very large floating structure(VLFS)is subjected to multi-axial loads in complex marine environment,which makes brace strut with weak stiffness easy to damage,thus affecting the safety and reliability of the very large floating structure.In order to obtain the ultimate bearing capacity of a brace strut under the combined loads,based on the mixed similarity theory of model design,an ultimate strength test model of the brace strut structure under bending and shearing load was designed.The model test of the brace strut ultimate strength under bending and shear loads was carried out.By comparison and analysis of results from model test and numerical simulation method,the correctness of the numerical simulation method was verified,and then the ultimate bearing capacity of the actual brace strut structure was given.The research results can provide support for the design and safety reliability assessment of the VLFS under bending and shear loads.

关 键 词：极限强度 撑杆 模型试验 数值仿真 

分 类 号：U661.4[交通运输工程—船舶及航道工程]