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.
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The Anchor-Last Deployment Problem for Inextensible Mooring Lines
Robert C. Rupe,
Robert C. Rupe
Bell Laboratories, Denver, Colo.
Robert W. Thresher
Department of Mechanical Engineering, Oregon State University, Corvallis, Ore.
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Rupe, R. C., and Thresher, R. W. (August 1, 1975). "The Anchor-Last Deployment Problem for Inextensible Mooring Lines." ASME. J. Eng. Ind. August 1975; 97(3): 1046–1052. https://doi.org/10.1115/1.3438654
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