Stochastic Simulation of an Initial Imperfection Data Bank for Isotropic Shells With General Imperfections

Author Type

Outside Researcher

Co-Author Type 1

Outside Researcher

Co-Author Type 2

Outside Researcher

Co-Author Type 3

Outside Researcher

College

Engineering and Computer Science

Department

Ocean and Mechanical Engineering

Document Type

Article

Publication/Event/Conference Title

Studies in Applied Mechanics

Publication Status

Version of Record

Abstract

A method for simulating random initial imperfections of shells with known probabilistic properties, and with both axisymmetric and nonsymmetric components, is presented. It consists in Fourier series expansion of the imperfection in terms of the structural mode shapes, truncating the series, and simulating the Fourier coefficients as random vectors. The mean and the autocovariance function are estimated through existing Initial Imperfection Data Banks, via statistical analysis. The result serves as input for the Monte Carlo method. The work generalizes earlier studies in which covariances between different Fourier coefficients were omitted. The present and previous simulation methods yield coincident results for initial imperfections which are weakly homogeneous in the circumferential direction. © 1988 Elsevier B.V.

First Page

195

Last Page

209

DOI

10.1016/B978-0-444-70474-0.50014-8

Publication Date

1-1-1988

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