联合载荷作用下撑杆结构极限强度研究  

Research of ultimate strength of the brace strut structure under combined load

作　　者：赵南[1] 顾学康[1] 李生鹏[1] 李政杰[1] 汤明刚 祁恩荣[1] ZHAO Nan;GU Xue-kang;LI Sheng-peng;LI Zheng-jie;TANG Ming-gang;QI En-rong(China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶力学》2019年第4期439-447,共9页Journal of Ship Mechanics

基　　金：超大型浮体结构安全可靠性研究(2013CB036105)

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。文章以超大型浮体撑杆结构为研究对象,基于模型相似理论,进行了压扭联合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,验证了数值仿真方法的正确性,并据此开展实尺度撑杆结构在不同扭转载荷作用下的压缩极限强度数值仿真计算,给出了压扭联合载荷作用下撑杆结构极限承载能力计算简化公式,为撑杆结构设计提供支撑。The very large floating structure was subjected to multi-axial loads in complex marine environment,which makes brace strut with weak stiffness easy to damage.Thus,it will affect the safety and reliability of the very large floating structure.Based on the model similarity theory,model design and test of compressive ultimate strength of the brace strut under torsion loads were accomplished.By comparison and analysis of results for model test and numerical simulation method,the correctness of the numerical simulation method was verified,and then the numerical simulation of compressive ultimate strength of full-scale brace strut under different torsion load was carried out,and the simplified calculation formula of interaction curve by curve fitting technique and torsion was obtained.The research results can support the design and safety reliability of the very large floating structure under combined loads.

关 键 词：联合载荷 极限强度 模型试验 撑杆 

分 类 号：U661.4[交通运输工程—船舶及航道工程]