准静态压缩载荷作用下U型折叠式夹层板芯层变形机理研究  

A study on the deformation mechanism of U-type corrugated cores sandwich panels subjected to quasi-static compression load

作　　者：李遥 刘昆[1] 沈超明[1] 王加夏 LI Yao;LIU Kun;SHEN Chaoming;WANG Jiaxia(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《振动与冲击》2022年第8期223-230,269,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51609110,51779110,51809122);江苏省自然科学基金(BK20191461);江苏省六大人才项目(KTHY-064)。

摘　　要：折叠式夹层板具备优越的力学性能,可满足船舶设计的诸多要求,已开始应用于高端船舶的设计制造中。以U型折叠式夹层板为研究对象,从试验、仿真以及解析三方面,研究了面内准静态压缩载荷作用下U型折叠式夹层板的解析预报方法。通过设计开展准静态压缩试验以及相应的数值计算,分析得出了U型夹层板在准静态压缩载荷作用下结构变形的特征并对夹层板的变形过程进行归纳分类;在此基础上,提出了折叠式夹层板结构在准静态压缩载荷下的变形模式,建立了折叠式夹层板塑性变形的几何数学模型,并推导出夹层板结构变形抗力的解析计算公式,最后以试验和仿真结果为依据验证解析计算方法和公式的正确性。结果表明:解析结果与试验和仿真结果吻合较好,该研究的解析法对折叠式夹层板压皱性能设计及评估具有指导意义。A corrugated cores sandwich panel has excellent mechanical properties and can meet many requirements in ship design.It has been applied in the design and manufacture of high-end ships.Therefore,the U-type corrugated cores sandwich panels were taken as the research object.The analytical prediction methods of U-type corrugated cores sandwich panels under in-plane quasi-static compression load were studied though experiments,simulation,and theoretical analysis.By designing and carrying out a quasi-static stamping test and corresponding simulation,the deformation characteristics of the U-type corrugated cores sandwich panels were analyzed and the deformation process was summarized and classified.On the basis,the deformation mode of the U-type corrugated cores sandwich panels was proposed,the geometric mathematical models of the plastic deformation of the U-type corrugated cores sandwich panels were established,and the analytical calculation formulas of the deformation resistance of the U-type corrugated cores sandwich panels were deduced.Finally,the calculated results were compared with the test results for verification.Results show that the analytical results are in good agreement with the experimental and simulation results.The analytical method presented in this paper has guiding significance for the design and evaluation of crushing performance of corrugated cores sandwich panels.

关 键 词：U型夹层板 面内准静态压缩载荷 试验和仿真 变形模式 解析计算法 

分 类 号：U674.941[交通运输工程—船舶及航道工程]