舰船桅杆夹层结构稳定性数值分析和试验  

Numerical simulation and experimental study of stability of marine sandwich structures in mast

作　　者：杨娜娜[1] 王耀辉[1] 王伟[1] 姚熊亮[1] 

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2014年第6期63-67,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金青年基金资助项目(50939002);中国博士后科学基金资助项目(3236310170);教育部博士学科点专项科研基金资助项目(20132304120009)

摘　　要：通过探索舰船桅杆夹层结构在海洋环境中的力学特性,得到了结构在轴向载荷下的极限强度和破坏模式,其中复合层板结构的材料失效准则采用Tsai-Wu准则,建立计及材料非线性与几何非线性的夹层结构的力学模型.研究结果表明:夹层结构在轴向载荷作用下的失效模式以结构的整体失稳和局部分层失稳为主;在夹层结构数值分析中,首层失效和最终失效得到的临界失稳载荷差距很小,工程上可以简化分析,不考虑材料失效;船用夹层结构的极限承载力计算方法可以为复合材料结构的舰船应用提供基础性技术支撑和工程化判据.The ultimate capacity and failure mode of the sandwich structures under axial load in marine environment was explored,and the Tsai-Wu criterion was adopted to identify the material failure of laminate structures.Both the materials nonlinearity and geometric nonlinearity were considered in the mechanical model.The study results show that the failure modes of sandwich structures under axial load are overall instability and local delaminating instability;whether considering material failure have little effect on results,thus the numerical simulation may ignore the material failure in engineering; the proposed numerical method provides theoritical support and engineering criteria to the application in marine structures.

关 键 词：船舶结构 夹层结构 极限强度 渐进损伤分析 实验研究 

分 类 号：U663.9[交通运输工程—船舶及航道工程]