Mechanical analysis of rib-reinforced rectangular thin-walled vessel under internal pressure

Abstract

The purpose of this study is to develop a simple and sufficiently accurate method to estimate deformation behavior of entire rectangular pressure vessel and investigate the influence of geometric parameters on ribs as well which can be given as appropriate design suggestion in industry For rectangular pressure vessels having reinforced members the corner should be considered deformable We take representative 2D model as analytical model and then derived the approximate analytical formulas These formulas including simplified and modified equations are suitable for different types of rib-reinforced vessels The main difference between two equations is the shear rigidity When the shear rigidity gets smaller the results obtained by modified formula are more close to those by finite element method In geometric parameters of rib the height is more important than the width so the height of rib should be major concerned in design Moreover rectangular vessels with radius corner make structure more compliant and significantly decrease the deflection than right corner one It is evident that stress concentration phenomenon is located at the right angle corners therefore it has to necessarily partly strengthen the corners Another important thing observed in the results diagrams is that cross rib-reinforced type is the more effective and simpler reinforcing way to increase the ability of resisting deflection than ring rib-reinforced type

Date of Award	2019
Original language	English
Supervisor	Tei-Chen Chen (Supervisor)