Governing equations and numerical solutions of tension leg platform with finite amplitude motion

Zeng, Xie; Shen, Xiaopeng; Wu, Yue

doi:10.1007/s10483-007-0105-1

Cited by 18 publications

(10 citation statements)

References 9 publications

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“…Dynamic responses due to the wind and wave effects need to be considered for a safe design [4]. The combined action from both wind and wave effects leads to a large amplitude of vibration on the ocean platform [5,6]. Vibration is the main detrimental effect that reduces the safety and fatigue life of a deep-sea platform.…”

Section: Introductionmentioning

confidence: 99%

A New Energy-Absorbing Device for Motion Suppression in Deep-Sea Floating Platforms

Zeng¹,

Yu²,

Zhang³

et al. 2014

Energies

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Deep-sea floating platforms are one of the most important large structures for ocean energy exploitation. A new energy-absorbing device named S-shaped Tuned Liquid Column Damper (TLCD) has been invented for the suppression of the horizontal motion and vertical in-plane rotation of a deep-sea floating platform. A conventional tuned liquid column damper has a U-shaped water tunnel to absorb the excessive energy of the main structure. The application of U-shaped dampers in deep-sea floating platforms is difficult due to the restriction of a large horizontal length. A novel S-shaped damper is proposed to retain the same amount of liquid using a shorter S-shaped tunnel. Theoretical and experimental works are conducted and prove that an S-shaped damper needs less than half the horizontal length to provide the same suppression as a U-shaped damper. A coupling calculation model is proposed and followed by the sensitivity analysis. The study demonstrates the applicability of the novel S-shaped damper for the motion suppression in deep-sea floating platforms.

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Section: Introductionmentioning

confidence: 99%

A New Energy-Absorbing Device for Motion Suppression in Deep-Sea Floating Platforms

Zeng¹,

Yu²,

Zhang³

et al. 2014

Energies

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“…The dynamic response of tall structures such as high-rise buildings and ocean platforms is highly apparent under external loads [1][2][3]. The vibration of such structures can be suppressed by strengthening the structure and increasing its size; however, this leads to a significant increase in its cost.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Variation Rules of Damping with Influential Factors of Tuned Liquid Column Damper

Zhang

2017

Shock and Vibration

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A tuned liquid column damper (TLCD) is a more effective form of passive control for structural vibration suppression and may be promising for floating platform applications. To achieve good damping effects for a TLCD under actual working conditions, factors that influence the damping characteristics need to be identified. In this study, the relationships between head loss coefficients and other factors such as the total length of the liquid column, opening ratio, Reynolds number, Kc number, and horizontal length of the liquid column were experimentally investigated. By using a hydraulic vibration table, a vibration test system with largeamplitude motion simulation, low-frequency performance, and large stroke force (displacement) control is devised with a simple operation and at low cost. Based on the experimental method of uniform design, a series of experimental studies were conducted to determine the quantitative relationships between the head loss coefficient and other factors. In addition, regression analyses indicated the importance of each factor affecting the head loss coefficient. A rapid design strategy of TLCD head loss coefficient is proposed. This strategy can help people conveniently and efficiently adjust the head loss coefficient to a specified value to effectively suppress vibration.

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“…Dynamic responses due to the wind and wave effects must be considered to ensure a safe design [1]. The combined action of complex multiple loads could cause a large vibration amplitude in marine structures [2,3]. Large amplitude and alternating vibration are the main detrimental effects that reduce the safety and fatigue life of a deep-sea platform.…”

Section: Introductionmentioning

confidence: 99%

The Stiffness and Damping Characteristics of a Dual-Chamber Air Spring Device Applied to Motion Suppression of Marine Structures

Zeng

Zhang

et al. 2016

Applied Sciences

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Dual-chamber air springs are used as a key component for vibration isolation in some industrial applications. The working principle of the dual-chamber air spring device as applied to motion suppression of marine structures is similar to that of the traditional air spring, but they differ in their specific characteristics. The stiffness and damping of the dual-chamber air spring device determine the extent of motion suppression. In this article, we investigate the stiffness and damping characteristics of a dual-chamber air spring device applied to marine structure motion suppression using orthogonal analysis and an experimental method. We measure the effects of volume ratio, orifice ratio, excitation amplitude, and frequency on the stiffness and damping of the dual-chamber vibration absorber. Based on the experimental results, a higher-order non-linear regression method is obtained. We achieve a rapid calculation model for dual-chamber air spring stiffness and damping, which can provide guidance to project design.

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Governing equations and numerical solutions of tension leg platform with finite amplitude motion

Cited by 18 publications

References 9 publications

A New Energy-Absorbing Device for Motion Suppression in Deep-Sea Floating Platforms

A New Energy-Absorbing Device for Motion Suppression in Deep-Sea Floating Platforms

Experimental Study on Variation Rules of Damping with Influential Factors of Tuned Liquid Column Damper

The Stiffness and Damping Characteristics of a Dual-Chamber Air Spring Device Applied to Motion Suppression of Marine Structures

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