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RESEARCH PAPERS

The Anchor-Last Deployment Problem for Inextensible Mooring Lines

[+] Author and Article Information
Robert C. Rupe

Bell Laboratories, Denver, Colo.

Robert W. Thresher

Department of Mechanical Engineering, Oregon State University, Corvallis, Ore.

J. Eng. Ind 97(3), 1046-1052 (Aug 01, 1975) (7 pages) doi:10.1115/1.3438654 History: Received July 29, 1974; Online July 15, 2010

Abstract

A lumped mass numerical model was developed which predicts the dynamic response of an inextensible mooring line during anchor-last deployment. The mooring line was modeled as a series of concentrated masses connected by massless inextensible links. A set of angles was used for displacement coordinates, and Lagrange’s Method was used to derive the equations of motion. The resulting formulation exhibited inertia coupling, which, for the predictor-corrector integration scheme used, required the solution of a set of linear simultaneous equations to determine the acceleration of each lumped mass. For the selected cases studied the results show that the maximum tension in the cable during deployment will not exceed twice the weight of the cable and anchor in water.

Copyright © 1975 by ASME
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