Numerical study of secondary effects in flexibility analysis of an ell-shaped piping structure
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Authors
Miles, John Henry Thomas
Subjects
Ell-shaped pipe
Secondary effects
Pipe expansion
Piping flexibility
Heating of pipe
Structural deformation
Secondary deformation
Secondary effects
Pipe expansion
Piping flexibility
Heating of pipe
Structural deformation
Secondary deformation
Advisors
Brock, John E.
Date of Issue
1967-09
Date
September 1967
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
This thesis considers the influence of four secondary effects on the analysis of a simple elle-shaped piping structure when it is uniformly heated. The four effects are: (a) axial deformation, (b) shearing deformation, (c) beam-column effect, and (d) difference between arc and chord. They are usually neglected in a piping flexibility analysis. In a paper of several years ago, J. E. Brock developed a theory for this investigation but did not present any numerical results or conclusions. The present thesis reviews Brock's theory and corrects some errors in coefficients. It then describes a digital computer program for IBM System 360 which performs the corresponding caluclations. Finally, it draws the new and quite significant conclusion that conventional piping stress analysis, which neglects these secondary effects, can result in gross errors in evaluating stresses in piping configurations which are likely to be encountered in piping practice
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
96 p.: ill.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.