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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part M. Journal of Engineering for the Maritime Environment >Parametric study of buckling and post-buckling behavior for an aluminum hull structure of a high-aspect-ratio twin hull vessel
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Parametric study of buckling and post-buckling behavior for an aluminum hull structure of a high-aspect-ratio twin hull vessel

机译：高谱比双壳船的铝壳结构屈曲和后屈曲行为的参数研究

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摘要

Metal plates are essential parts of structures such as ship hulls and offshore oil platforms. These plates are typically under compressive axial forces. Hence, one of the main mechanisms for failure and collapse of such structures is buckling of plates. Thus, for safe and secure design, buckling strength of plates should be evaluated. Finite element analysis techniques are perfect tools for this purpose because of the accuracy and flexibility for performing simulations with different variables. In this study, the strength of aluminum plates has been studied using finite element analysis software and it was tried to study the influence of variables such as initial imperfections, plate thickness and aspect ratio on plate strength. It was found that increase in the imperfection magnitude leads to a decrease in the strength of the plate. This is mostly noticed in thin plates because of the plate's stiffness reduction. Although the plate's aspect ratio has a slight effect on strength, it has a considerable impact on the failure mechanism. In order to study a combination of plates and stiffeners buckling behavior, part of a high-aspect-ratio twin hull vessel hull structure is assessed under bending moment. It is observed that longitudinal stiffeners at the bottom of the hull in linear analysis undergo the maximum stress, while in non-linear analysis, the maximum stress is spread along with the structure of the deck and bottom, and neutral axis tolerates the minimum stress.
机译：金属板是船体和海上石油平台等结构的必要条件。这些板通常在压缩轴向力下。因此，这种结构的故障和塌陷的主要机制之一是板块的屈曲。因此，为了安全和安全的设计，应评估板的屈曲强度。有限元分析技术是此目的的完美工具，因为可以使用不同变量进行模拟的准确性和灵活性。在这项研究中，使用有限元分析软件研究了铝板的强度，试图研究变量的影响，例如初始缺陷，板厚和纵横比对板强度。发现缺陷幅度的增加导致板材的强度降低。由于板的刚度降低，这大部分都在薄板中被注意到。虽然板的纵横比对强度有轻微影响，但它对失效机制具有相当大的影响。为了研究板块和加强件的组合屈曲行为，在弯矩下评估高谱比双壳血管船体结构的一部分。观察到，船体底部的纵向加强件在线性分析中经历最大应力，而在非线性分析中，最大应力与甲板和底部的结构一起传播，并且中性轴容忍最小应力。

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