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Experimental numerical and analytical analysis of the penetration of a scaled double-hull tanker side structure
Marine Structures ( IF 3.9 ) Pub Date : 2021-05-08 , DOI: 10.1016/j.marstruc.2021.103018
Bin Liu , Gang Wang , Baiqiao Chen , C. Guedes Soares

The paper presents experimental, numerical and analytical analyses of a small-scale double-hull structure quasi-statically punched at the mid-span by a rigid flat edge indenter, to examine its energy-absorbing mechanism and fracture. The present study aims to further validate the numerical analysis procedure and the analytical method of individual stiffened panels and web girders against the experiment of the double-hull structure. The specimen, scaled from a tanker's double side structure, includes three spans between the web frames and two spans between the stringers. The paper provides practical information to estimate the extent of structural damage within ship sides during collision accidents. The experimentally obtained force-displacement response and deformation shape show a good agreement with the simulations performed by the explicit LS-DYNA finite element solver. The analysis of the double-hull structure demonstrates the accuracy of the procedure for identifying standard inputs used in numerical codes, in particular the definition of material plastic hardening and the calibration of the critical failure strain by tensile test simulation. The experimental and numerical results are used to validate the analytical method proposed in previous investigations at the plastic deformation stage and a revised semi-analytical method is proposed in the present study for the large penetration stage.



中文翻译:

比例尺双壳油轮舷侧结构贯穿性的实验数值分析分析

本文介绍了由刚性平边压头在中跨准静态冲压的小型双壳结构的实验,数值和分析分析,以研究其能量吸收机理和断裂。本研究旨在进一步验证数值模拟程序和单板加筋腹板大梁的分析方法,以对抗双壳体结构的实验。从油轮的双面结构缩放标本,包括在网架之间的三个跨度和在纵梁之间的两个跨度。该文件提供了实用信息,以估计碰撞事故期间船侧结构性损坏的程度。实验获得的力-位移响应和变形形状与显式LS-DYNA有限元求解器进行的仿真显示出良好的一致性。对双壳体结构的分析证明了识别数字代码中使用的标准输入的程序的准确性,特别是材料塑性硬化的定义以及通过拉伸试验模拟对关键破坏应变的校准。实验和数值结果被用来验证以前的研究在塑性变形阶段提出的分析方法,并且在本研究中为大渗透阶段提出了一种修正的半分析方法。对双壳体结构的分析证明了识别数字代码中使用的标准输入的程序的准确性,特别是材料塑性硬化的定义以及通过拉伸试验模拟对关键破坏应变的校准。实验和数值结果被用来验证以前的研究在塑性变形阶段提出的分析方法,并且在本研究中为大渗透阶段提出了一种修正的半分析方法。对双壳体结构的分析证明了识别数字代码中使用的标准输入的程序的准确性,特别是材料塑性硬化的定义以及通过拉伸试验模拟对关键破坏应变的校准。实验和数值结果被用来验证以前的研究在塑性变形阶段提出的分析方法,并且在本研究中为大渗透阶段提出了一种修正的半分析方法。

更新日期:2021-05-08
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