Investigation of nonlinear restoring stiffness in dynamic analysis of tension leg platforms

Senjanović, Ivo and Tomić, Marko and Rudan, Smiljko (2013) Investigation of nonlinear restoring stiffness in dynamic analysis of tension leg platforms. = Investigation of nonlinear restoring stiffness in dynamic analysis of tension leg platforms. Engineering Structures, 56. pp. 117-125. ISSN 0141-0296. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2013). Točan broj autora: 3.

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Abstract

Shortcomings of the traditional stiffness matrix in dynamic analysis of TLPs, derived by considering equilibrium of forces, are pointed out, as well as dilemma concerning consistency of the recently presented matrix based on energy balance. New stiffness matrix is derived by utilizing both force equilibrium approach, with algebraic averaging and root mean square of tendon forces, and energy balance approach for large surge and sway. Yaw is treated as a small and large displacement. Static numerical analysis is performed for all six cases by imposing surge force and yaw moment. The obtained results are compared with those of FEM analysis, and useful conclusion is drawn, which can be used for improvement of uncoupled mathematical model of TLPs.

Item Type:	Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian):	FEM analysis; Force equilibrium; Large displacements; Non-linear stiffness; Restoring stiffness; Root Mean Square; Tendon forces; Yaw moment, Energy balance; Finite element method; Mathematical models; Stiffness matrix; Tension-leg platforms, Stiffness, energy balance; finite element method; numerical method; numerical model; stiffness; tension leg platform
Subjects:	TECHNICAL SCIENCE > Shipbuilding TECHNICAL SCIENCE > Civil engineering TECHNICAL SCIENCE > Mining, petroleum and geological engineering
Divisions:	600 Department of Naval Engineering and Marine Technology > 620 Chair of Marine Structures Design
Indexed in Web of Science:	Yes
Indexed in Current Contents:	Yes
Quartiles:	Q1 (2013)
Date Deposited:	11 May 2015 12:51
Last Modified:	20 Dec 2017 09:17
URI:	http://repozitorij.fsb.hr/id/eprint/4019

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