Implications of Tendon Modeling on Nonlinear Response of TLP
Publication: Journal of Structural Engineering
Volume 122, Issue 2
Abstract
This paper studies the implication of the tendon modeling on the global response of tension leg platforms (TLPs) in general, and on the surge motion (low-frequency response) and the limits of the tendon forces (high-frequency response) in particular. The tendons are modeled as massless elastic springs connected to the hull or as flexural beam elements with mass and hydrodynamic forces. For the latter, a complete nonlinear large-displacement coupled analysis is performed. The TLP studied is subjected to regular waves with various heights and periods in different water depths. Among other conclusions, the results show that while the simple elastic spring modeling of the tendons with constant lateral stiffness is satisfactory in computing the surge response (horizontal motion) amplitude, the hydrodynamic forces on the tendons are very important in accurately predicting the surge mean value (offset). The hull setdown (vertical displacement associated with the horizontal motion) also significantly affects the tendon forces, particularly for not very deep water.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 122 • Issue 2 • February 1996
Pages: 142 - 149
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Feb 1, 1996
Published in print: Feb 1996
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