Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2022 , Vol. 56 >Issue 6: 710 - 721

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2021.071

Naval Architecture, Ocean and Civil Engineering

Application of Plane Elements and Shell Elements in Imitating Ribs of Members in Compound Strip Method

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  • 1. School of Naval Architecture Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Department of Engineering, SUNY Polytechnic Institute, New York 13502, USA

Received date: 2021-05-06

  Online published: 2022-07-04

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Abstract

Finite strip method (FSM) is a classical method to analyze the buckling of thin-walled members. The traditional FSM adopting trigonometric functions longitudinally can hardly analyze the members with spaced ribs along the longitudinal direction, while the compound strip method (CSM) can compensate for this shortcoming. Based on the CSM, the influence of utilizing plane elements and shell elements to respectively imitate stiffeners on buckling is investigated. Compared with the shell-element ribs, the plane-element ribs are prone to assembling the stiffener matrices with fewer degrees of freedom. But the shell-element ribs are more comprehensive as the out-plane displacement of ribs are taken into consideration. It is found that plane element ribs and shell element ribs have little difference on the buckling capacity of members. The buckling capacity has a small difference of mean absolute error (MAE) underneath 0.75% between the two types of CSMs, and the buckling capacity and modes are in good agreement with the finite element results. The buckling loads of the two types of CSMs are close to the FEM with a MEA less than 5%. The accuracy of the plane elements satisfies the predicted requirements, which helps to reduce the program computation and simplify the analysis complexity. The efficiency of analysis can be dramatically improved for fine meshing elements.

Key words： compound strip method (CSM); buckling; plane element; shell element; ribs

Cite this article

HOU Yanguo, LI Zhanjie, GONG Jinghai . Application of Plane Elements and Shell Elements in Imitating Ribs of Members in Compound Strip Method[J]. Journal of Shanghai Jiaotong University, 2022 , 56(6) : 710 -721 . DOI: 10.16183/j.cnki.jsjtu.2021.071

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