金属夹层板以优异的力学性能已应用于实船。本文根据与加筋板重量相当原则，设计一种金属折叠式夹层板结构，考虑其应用于舰船甲板的受力特性，采用非线性有限元方法，研究夹层板结构在不同组合载荷作用下的非线性后屈曲极限强度。首先通过与经验公式及相关结果对比验证了本文数值仿真方法和技术的可行性和准确性；然后建立双向面内受压和垂向载荷作用下的金属折叠式夹层板结构数值模型，基于屈曲特征值确定屈曲极限强度分析的初始缺陷；考虑结构初始缺陷，计算得到夹层板结构的后屈曲极限强度；对金属折叠式夹层板在不同组合载荷作用下的横向、纵向后屈曲极限承载能力进行计算分析；并与传统加筋结构对比，结果显示本文设计的金属折叠式夹层板结构具有更优异的稳定性和极限承载力，结果对金属夹层板的应用与强度设计提供参考。
Corrugated core sandwich panel is widely employed in ship building due to its excellent mechanical properties. The same-weight design of U-type corrugated core sandwich panel under constrained nonlinear post-buckling strength is investigated herein considering the combined compression loading. Firstly, The feasibility and accuracy of numerical simulation method is verified by comparing the empirical formulas and relevance judgments. Then a finite element model of sandwich panels under biaxial compression and lateral pressure is constructed to obtain the buckling eigenvalue and initial imperfection for post-buckling strength analysis. The comparison results showed that the sandwich panel has better stability and ultimate bearing capacity. Finally, the post-buckling ultimate bearing capacities of sandwich panel longitudinal and transverse directions under combined loading are studied. The results may be of guidance for optimal design of new type ship structures.
2018,40(9): 43-47 收稿日期：2017-06-26
DOI：10.3404/j.issn.1672-7649.2018.09.008
分类号：U661.43;O242. 21
基金项目：国家自然科学基金青年基金资助项目（E091002/51109101）；江苏省高校自然科学研究重大资助项目（17KJA580002）
作者简介：洪婷婷(1988-),女,工程师,研究方向为船舶与海洋工程结构
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