Design and Installation of a Mooring System in 2,910 ft of Water

Taylor, Robert J.; Chung, Tae Young; Shields, Daniel; Ottsen, H.

doi:10.4043/5529-ms

Cited by 2 publications

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“…A three-point mooring is used and each mooring leg is 4400 ft long and is composed of a chain platform pendant, polyester line, anchor chain, and anchor as described in [11]. Mooring design details are given in [11,12].…”

Section: Measurement Experimentsmentioning

confidence: 99%

Ocean Model Testing of a Small Semisubmersible

Shields

Zueck

Nordell

1987

Offshore Technology Conference

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Moored small semisubmersibles are proposed as ocean facilities for Navy ranges. An ocean testing program is underway to collect marine data for evaluating the performance and validating numerical simulation models of these small semisubmersible platforms. The ocean testing program includes the deployment of a moored semisubmersible buoy in 2,910 feet of water off the coast of Southern California. A marine data collection system has been developed to obtain data on the meteorologic, oceanographic, and platform and mooring structural response parameters. Unique and complex algorithms have been developed to process the data for use in validating frequency-and time-domain simulation models of a moored semisubmersible.

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Section: Measurement Experimentsmentioning

confidence: 99%

Ocean Model Testing of a Small Semisubmersible

Shields

Zueck

Nordell

1987

Offshore Technology Conference

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Nonlinear vibrations of suspended cables—Part III: Random excitation and interaction with fluid flow

Ibrahim

2004

Applied Mechanics Reviews

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This review article deals with the random excitation of nonlinear strings and suspended cables in air and fluid flow. For strings and 1D cables, the system dynamics is governed by different forms of Duffing oscillator. A brief review is devoted to the stochastic excitation of a Duffing oscillator. Under random excitation, this oscillator may or may not possess multiple solutions depending on the excitation bandwidth and level. One may be interested in estimating response statistics, first passage problem, and power spectral density. Particular attention is given to the complex response phenomena associated with increasing the spectral density level of excitation. The numerical results of the problem of nonlinear modal interaction in suspended cables will be discussed in the neighborhood of multiple internal resonance conditions. For a unimodal response, the linear theory fails to predict nonzero mean response and underestimates the mean square response under white noise excitation. Complex response phenomena such as “on-off” intermittency, energy transfer, and stochastic bifurcation are reviewed. The dynamic behavior of suspended cables in still air is different from that in flowing fluid or severe wind current due to the action of vortices, fluid normal forces, added fluid inertia force, and fluid drag force. Aeolian and galloping vibration of suspended cables in air and their dynamics in fluid flow are discussed, together with the influence of dynamic tension. In the absence of external excitation, the action of fluid forces induces vibration to the cable. The dynamics of cables subjected to steady and random fluid flow is reviewed for mooring systems. Depending on the flow speed, the cable may experience divergence or flutter similar to the case of aeroelastic structures. While the deterministic theory of strings and cables has reached an advanced stage, the reader will realize that these systems need further investigations under random excitations. There are 297 references cited in this review article.

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Design and Installation of a Mooring System in 2,910 ft of Water

Cited by 2 publications

References 0 publications

Ocean Model Testing of a Small Semisubmersible

Ocean Model Testing of a Small Semisubmersible

Nonlinear vibrations of suspended cables—Part III: Random excitation and interaction with fluid flow

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