A Theoretical Approach to Hydroelastic Behavior of a Very Large Floating Structure in Regular Waves (Fourth Report)

Seto, Hideyuki; Ochi, Mayumi; Ohta, M.; Kawakado, Shoji

doi:10.2534/jjasnaoe1968.2001.47

Cited by 5 publications

(1 citation statement)

References 2 publications

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“…It is noted that for large stiffness coefficient values, the maximum absolute deflection is practically independent of the studied damping parameter values. Additionally, it is observed in Fig.7 (a) and (b), that the optimal damping parameter, minimizing the maximum absolute deflection, is generally dependent on the stiffness of the 22 connectors. In the overdamped case ( 1 c  ) the above correlation appears weaker.…”

Section: Constant Depth Environmentmentioning

confidence: 96%

Time-domain, shallow-water hydroelastic analysis of VLFS elastically connected to the seabed

2016

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In order to ensure the safe operation of a VLFS, a combination of mooring, breakwater and other motion reducing systems is employed. In the present work, the transient hydroelastic response of a floating, thin elastic plate, elastically connected to the seabed, is examined. The plate is modelled as an Euler-Bernoulli strip, while the linearized shallow water equations are used for the hydrodynamic modelling. Elastic connectors are approximated by a series of simple spring-dashpot systems positioned along the strip. A higher order finite element scheme is employed for the calculation of the hydroelastic response of the strip-connector configuration, over the shallow bathymetry. After the definition of the initial-boundary value problem, its variational form is derived and discussed. Next, on the basis of the aforementioned formulation, an energy balance expression is obtained. The effect of variable bathymetry on the response of a two connector-strip system, is examined by means of three seabed profiles, featuring a flat bottom, an upslope and a downslope environment. For the flat bottom case, the strip response mitigating effect exerted by the employment of two and three elastic connectors is considered. Finally, by means of the derived energy balance equation, the energy exchange is monitored, providing a valuable insight into the transient phenomena that take place in the studied configurations.

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Section: Constant Depth Environmentmentioning

confidence: 96%