Conceptual Discussion on Free Vibration Analysis of Tension Leg Platforms

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Conceptual Discussion on Free Vibration Analysis of Tension Leg Platforms
Mohammad Reza Tabeshpour
Center of Excellence in Hydrodynamics and Dynamics of Marine Vehicles, Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran
tabeshpour@sharif.edu
Abstract
Tension leg platforms are used for oil exploitation in deep
water. The accurate and reliable responses are needed for
optimum design and control of the structure. Free vibration
analysis gives us a deep view of structural response and the
judgment on coupling effects between degrees of freedom.
In this paper the nonlinear dynamic analysis of TLP is
carried out. The power spectral densities (PSDs) of responses
are calculated from nonlinear responses. A computer
program has been developed capable of solving differential
equation of motion of TLP under various types of excitations.
The focus of the paper is on the conceptual discussion of the
structural behavior and responses of the structure related to
initial arbitrary conditions. As an example a case study is
investigated and numerical results are discussed.
Keywords
TLP; Free Vibration; Dynamic Analysis

 

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