RESEARCH PAPERS: Offshore Mechanics

New Efficient and Accurate Method of Nonlinear Analysis of Offshore Tubular Frames (the Idealized Structural Unit Method)

[+] Author and Article Information
Y. Ueda, K. Nakacho

Welding Research Institute, Osaka University, Osaka, Japan

S. M. H. Rashed

Century Research Center Corporation, Osaka, Japan

J. Energy Resour. Technol 107(2), 204-211 (Jun 01, 1985) (8 pages) doi:10.1115/1.3231178 History: Received June 22, 1983; Revised November 06, 1984; Online October 22, 2009


The Idealized Structural Unit Method [1, 2] is applied to the analysis of nonlinear behavior of three-dimensional offshore tubular frames. To this purpose the “tubular structural unit” is developed and used to analyze the entire behavior of the frame until final collapse. In this method large deflections, instability, plasticity and the effect of residual stresses and initial out of straightness are considered. Modeling of a structure is very simple since large structural units are regarded as elements. The required computer effort is very small while attaining a high degree of accuracy and reliability.

Copyright © 1985 by ASME
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