Dynamic behaviour of square and triangular offshore tension leg platforms under regular wave loads

Chandrasekaran, S.; Jain, Arvind K.

doi:10.1016/s0029-8018(00)00076-7

Cited by 66 publications

(24 citation statements)

References 3 publications

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“…The traditionally used stiffness matrix manifests shortcomings [7,8], while there is doubt concerning consistency of the recently derived matrix [10]. Therefore a detailed analysis of the problem is undertaken.…”

Section: Resultsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

“…Nowadays, the secant stiffness matrix introduced in [6] and slightly modified in [7,8] is still widely used for dynamic analysis of TLPs. Its formulation is based on equilibrium of restoring forces due to large displacements.…”

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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“…The mooring stiffness matrix of traditional tension leg foundation have the same form as Serbuoys-TLP as shown in Equation (2). The derivation process of TLP is described by Chandrasekaran [20]. With the consideration of coupling effect, derivations on the stiffness of the Serbuoys-TLP mooring lines are given (see Section 2.3):…”

Section: Mooring Stiffness Matrix Of Serbuoys-tlp In Surge and Sway Dmentioning

confidence: 99%

A Comprehensive Study on the Serbuoys Offshore Wind Tension Leg Platform Coupling Dynamic Response under Typical Operational Conditions

Ren

Wang

et al. 2019

Energies

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A new type of offshore wind tension leg platform (TLP) connected with a series of buoys (Serbuoys-TLP) is proposed. With the consideration of coupling effect, derivations on the stiffness of the Serbuoys-TLP mooring lines are given. The complicated coupling motion characteristics of the TLP with buoys system are investigated by means of experiments and numerical analysis. The suppressive efficiency on the surge under some condition is nearly 68%, when the wave period is the common wave period of the East China Sea (6 s). Namely, the suppressive effect of series buoys on surge motion response of TLP is analyzed. Through several aspects of suppressive effect on the surge including wave properties, submerge volume and position of buoys are investigated. The modal analysis method is also adopted to interpret the coupled motion response. In the end, the responses of TLP and Serbuoys-TLP are simulated under actual sea conditions with the consideration of wind, wave and current. Based on the parametric study using the modal analysis combined with hydrodynamic analysis, the conclusion can be drawn that the surge of TLP can be effectively suppressed by the addition of a series of buoys in the Serbuoys-TLP.

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“…Jain (1997) presented a stiffness matrix considering the surge, sway and yaw modes for a rectangular TLP. Chandrasekaran and Jain (2002) derived a nonlinear stiffness matrix as a function of the platform displacements for a triangular TLP to simulate the six-degrees-of-freedom (6-DOF) response to regular wave loads. The derived form considered coupling among the displacements based on some geometric approximations.…”

Section: Introductionmentioning

confidence: 99%

Stiffness of slack and taut moorings

Al-Solihat

Nahon

2015

Ships and Offshore Structures

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This paper presents an exact nonlinear analysis for the stiffness of a mooring system as a function of the displacement and orientation of the floating structure. The analysis allows a derivation of the mooring stiffness matrix while considering slack mooring line resting on the seabed, as well as slack and taut suspended lines. In contrast to other similar analyses, numerical finite differences are not required to calculate the entries of the stiffness matrix. The influence of mooring system geometry, configuration and number of lines on the mooring system stiffness is then investigated for a taut-leg platform.

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Dynamic behaviour of square and triangular offshore tension leg platforms under regular wave loads

Cited by 66 publications

References 3 publications

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

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

A Comprehensive Study on the Serbuoys Offshore Wind Tension Leg Platform Coupling Dynamic Response under Typical Operational Conditions

Stiffness of slack and taut moorings

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