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RESEARCH PAPERS

Sizing Design Sensitivity Analysis and Optimization of a Hemispherical Shell With a Nonradial Penetrated Nozzle

[+] Author and Article Information
A. L. Rusu-Casandra

“Politehnica” University of Bucharest, Department of Strength of Materials, 313, Splaiul Independentei, 77206 Bucharest, Romania

I. R. Grindeanu

Military Technical Academy, Department of Mechanical Engineering, 81-83, George Cosbuc Blvd., 75275 Bucharest, Romania

K.-H. Chang

School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019

J. Pressure Vessel Technol 120(3), 238-243 (Aug 01, 1998) (6 pages) doi:10.1115/1.2842052 History: Received November 19, 1997; Revised March 16, 1998; Online February 11, 2008

Abstract

This paper presents a sizing optimization of a hemispherical shell with a nonradial penetrated nozzle, under internal pressure loading. The objective of the optimization is to decrease the stress concentration in the intersection area, through the variation of the thicknesses of the shells, on condition the volume have a minimum value. This is accomplished by performing a stress analysis and by developing a sizing optimization. The variational equations of elasticity and an adjoint variable method are employed to calculate sizing design sensitivities of stresses. This continuum approach combined with a gradient method could be applied to broad classes of elastic structural sizing optimization problems.

Copyright © 1998 by The American Society of Mechanical Engineers
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