Dynamic Response of Compliant Offshore Structures—Review

Adrezin, Ronald S.; Bar-Avi, P.; Benaroya, Haym

doi:10.1061/(asce)0893-1321(1996)9:4(114)

Cited by 49 publications

(29 citation statements)

References 79 publications

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“…For numerical purposes, we first consider a beam whose numerical values are based on a quarter of the TLP model from the ISSC Derived Loads Committee I.2 developed in 1985 [1,18]. The properties of the ISSC model are given in Table 2.…”

Section: Resultsmentioning

confidence: 99%

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Comparison of linear and nonlinear responses of a compliant tower to random wave forces

Han

Benaroya

2002

Chaos, Solitons & Fractals

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Section: Resultsmentioning

confidence: 99%

“…Reviews of the dynamic responses of compliant towers can be found in [1]. In modeling the vertical members of offshore towers, rigid body motion and bending are the primary components of the overall behavior.…”

Section: Introductionmentioning

confidence: 99%

Comparison of linear and nonlinear responses of a compliant tower to random wave forces

Han

Benaroya

2002

Chaos, Solitons & Fractals

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“…Compliant structures also undergo small displacements, but these displacements are large enough to necessitate the introduction of nonlinear methods to solve for the structural response. An extensive review of the nonlinear dynamics of compliant structures has been presented by Adrezin et al (1996). Compliant structures are better suited than traditional frame structures for deeper water applications, since such facilities need not be as reinforced against the ocean environment as the more traditional structures.…”

Section: (A ) Compliant Offshore Structuresmentioning

confidence: 99%

Modelling vortex-induced fluid–structure interaction

Benaroya

Gabbai

2007

Phil. Trans. R. Soc. A.

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The principal goal of this research is developing physics-based, reduced-order, analytical models of nonlinear fluid-structure interactions associated with offshore structures. Our primary focus is to generalize the Hamilton's variational framework so that systems of flowoscillator equations can be derived from first principles. This is an extension of earlier work that led to a single energy equation describing the fluid-structure interaction. It is demonstrated here that flow-oscillator models are a subclass of the general, physical-based framework. A flow-oscillator model is a reduced-order mechanical model, generally comprising two mechanical oscillators, one modelling the structural oscillation and the other a nonlinear oscillator representing the fluid behaviour coupled to the structural motion.Reduced-order analytical model development continues to be carried out using a Hamilton's principle-based variational approach. This provides flexibility in the long run for generalizing the modelling paradigm to complex, three-dimensional problems with multiple degrees of freedom, although such extension is very difficult. As both experimental and analytical capabilities advance, the critical research path to developing and implementing fluid-structure interaction models entails -formulating generalized equations of motion, as a superset of the flow-oscillator models; and -developing experimentally derived, semi-analytical functions to describe key terms in the governing equations of motion. The developed variational approach yields a system of governing equations. This will allow modelling of multiple d.f. systems. The extensions derived generalize the Hamilton's variational formulation for such problems. The Navier-Stokes equations are derived and coupled to the structural oscillator. This general model has been shown to be a superset of the flow-oscillator model. Based on different assumptions, one can derive a variety of flowoscillator models.

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“…TLP motion in waves is nonlinear due to nonlinear restoring stiffness and damping, [3]. The tendons make TLPs more mobile in horizontal than in vertical plane and ensure almost horizontal position of the working area.…”

Section: Introductionmentioning

confidence: 99%

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

Senjanović

Tomić

Rudan

2013

Engineering Structures

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a b s t r a c tShortcomings 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.

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Dynamic Response of Compliant Offshore Structures—Review

Cited by 49 publications

References 79 publications

Comparison of linear and nonlinear responses of a compliant tower to random wave forces

Comparison of linear and nonlinear responses of a compliant tower to random wave forces

Modelling vortex-induced fluid–structure interaction

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

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