A comprehensive analytical model for global buckling analysis of general grid cylindrical structures with various cell geometries

International Journal for Computational Methods in Engineering Science and Mechanics Pub Date : 2021-02-24 DOI:10.1080/15502287.2021.1889716

M. Abbasi, J. Ghanbari

{"title":"A comprehensive analytical model for global buckling analysis of general grid cylindrical structures with various cell geometries","authors":"M. Abbasi, J. Ghanbari","doi":"10.1080/15502287.2021.1889716","DOIUrl":null,"url":null,"abstract":"Abstract In this paper, we present an analytical method based on equivalent continuum homogenization for the global buckling analysis of the general grid lattice cylindrical structures. In the proposed scheme, grid structures with arbitrary cell geometries can be analyzed by obtaining their effective cell stiffness based on force and moment analysis of the struts. The grid structures are assumed to be composed of curvilinear axial, circumferential, and oblique unidirectional composite ribs. To evaluate the results of the presented analytical method, a parametric finite element code is derived to generate the desired geometry of the grid structures and their buckling loads are obtained and compared with the analytical method. The effects of various parameters, including the number of ribs, their thickness and elastic properties, and helical angle of the oblique ribs are studied for hexagonal, triangular, and mixed grid shells. The results are compared with the available data published in the literature with a good agreement.","PeriodicalId":315058,"journal":{"name":"International Journal for Computational Methods in Engineering Science and Mechanics","volume":"42 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal for Computational Methods in Engineering Science and Mechanics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/15502287.2021.1889716","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 2

Abstract

Abstract In this paper, we present an analytical method based on equivalent continuum homogenization for the global buckling analysis of the general grid lattice cylindrical structures. In the proposed scheme, grid structures with arbitrary cell geometries can be analyzed by obtaining their effective cell stiffness based on force and moment analysis of the struts. The grid structures are assumed to be composed of curvilinear axial, circumferential, and oblique unidirectional composite ribs. To evaluate the results of the presented analytical method, a parametric finite element code is derived to generate the desired geometry of the grid structures and their buckling loads are obtained and compared with the analytical method. The effects of various parameters, including the number of ribs, their thickness and elastic properties, and helical angle of the oblique ribs are studied for hexagonal, triangular, and mixed grid shells. The results are compared with the available data published in the literature with a good agreement.

查看原文本刊更多论文

一种适用于各种单元几何形状的一般网格圆柱结构整体屈曲分析的综合分析模型

摘要本文提出了一种基于等效连续介质均匀化的分析方法，用于一般网格点阵圆柱结构的整体屈曲分析。在该方案中，通过对杆的受力和弯矩分析，获得任意单元几何形状的网格结构的有效单元刚度。假设网格结构由曲线轴向、周向和斜向单向复合肋组成。为了评价所提出的解析方法的结果，推导了参数化有限元程序来生成所需的网格结构几何形状，并得到了网格结构的屈曲载荷，并与解析方法进行了比较。针对六边形、三角形和混合网格壳，研究了斜肋的数量、厚度和弹性性能以及斜肋的螺旋角等参数的影响。将所得结果与文献中已发表的数据进行了比较，结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal for Computational Methods in Engineering Science and Mechanics

自引率

0.00%

发文量