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RESEARCH PAPERS: Offshore Mechanics

Dynamics of Disconnected Risers Under Rigid and Compliant Hang-Off

[+] Author and Article Information
N. M. Patrikalakis

Department of Ocean Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

D. Y. Yoon

Daewoo Shipbuilding and Heavy Machinery Co., Geoje-kun, Kyungnam, Korea

J. Offshore Mech. Arct. Eng 112(2), 106-114 (May 01, 1990) (9 pages) doi:10.1115/1.2919844 History: Received November 11, 1987; Revised July 24, 1989

Abstract

An efficient solution scheme to simulate the nonlinear motions of hanging risers based on an adaptive nonuniform grid finite difference method and an implicit time integration scheme is presented. Dynamic buckling-type response of hanging risers under rigid hang-off due to heave acceleration of the support platform in extreme excitation conditions is studied, and the important parameters affecting the response are identified. Significant reduction of motions and resulting stresses is obtained by employing compliant hang-off.

Copyright © 1990 by The American Society of Mechanical Engineers
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