Review of hydroelasticity theories for global response of marine structures

Chen, Xujun; Wu, Yusen; Cui, Weicheng; Jensen, Jørgen Juncher

doi:10.1016/j.oceaneng.2004.04.010

Cited by 143 publications

(58 citation statements)

References 45 publications

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“…Similarly, in ship Hydroelasticity (Bishop et al, 1986;Chen et al, 2006;Temarel and Hirdaris, 2009), this idea has also been extensively applied to compute the structure dynamics in regular and irregular waves (irregular wave calculation is also based on the regular case using spectral method). However, this computation is usually based on the small wave amplitude assumption (linear wave), and consequently the fluid domain is calculated using potential flow theory, subject to the boundary conditions at the mean free surface and structure positions (Temarel and Hirdaris, 2009).…”

Section: Introductionmentioning

confidence: 99%

Coupled MPS-modal superposition method for 2D nonlinear fluid-structure interaction problems with free surface

Sun

Djidjeli

Xing

et al. 2016

Journal of Fluids and Structures

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Keywords:Moving particle semi-implicit (MPS) method Fluid structure interaction (FSI) Modal superposition Free surface flow Floating beam Flexible wedge dropping a b s t r a c tIn this paper, a coupled MPS-modal superposition method is developed for 2D nonlinear fluid-structure interaction problems. In this method, the rigid-body and relatively small elastic deformation are coupled together, which considers the mutual effect between them. The elastic deformation of the structure is represented by a mode superposition formulation, which is more efficient compared with FEM, regardless of the size of the structure. For 2D cases, if the first three modes are chosen to represent the flexible deformation of the structure, it only results in a 6 Â 6 matrix equation to be solved. For the fluid motion, the modified Moving Particle Semi-implicit (MPS) method, which significantly reduces the fluctuation of pressure calculation of the original MPS method, is used.Two nonlinear problems, i.e. breaking-water-dam impacting a floating beam and flexible wedge slamming into the water are simulated to demonstrate the performance of the developed method. The numerical simulations show that this coupling model is capable of providing stable results that are generally in good agreement with the available experimental data. For the highly nonlinear case with very large rigid motions, the mutual effect between elastic deformation and rigid motions could accumulate to a relatively remarkable level shown by the curves of trajectories or acceleration history of the body mass centre. This also indicates the importance of mutual effect to analyse highly nonlinear FSI problems with large rigid-body motions and relatively small flexible deformation.

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Section: Introductionmentioning

confidence: 99%

Coupled MPS-modal superposition method for 2D nonlinear fluid-structure interaction problems with free surface

Sun

Djidjeli

Xing

et al. 2016

Journal of Fluids and Structures

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“…With horizontal dimensions stretching from tens to hundreds of meters, VLFSs provide extended floor span, highly desirable for various applications ranging from storage, docking and military operation platforms to recreational facilities and floating airport and helicopter bases [1,2]. Moreover, the ability to moor the structures at safe distances from the shore makes them suitable for the accommodation of socially sensitive facilities, such as power and sewage treatment plants [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Considering long wave excitation, Sturova [16] developed an eigenfunction expansion technique for the calculation of the hydroelastic response of thin heterogeneous plates. In the same line of work, 4 analysis of the vertical strip deflection, bending moment, strain shear force and spatial distribution for moored configurations under harmonic excitation is presented.…”

Section: Introductionmentioning

confidence: 99%

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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“…The foundation of both fields is set on hydroelasticity, the branch of science concerned with the response of deformable immersed bodies under sea wave excitation [22]. Applications span from ships and VLFSs [22][23][24] to floating ice bodies [13]. Frequency domain methods, serving as primary analysis tools, are based on mesh methods [25,26] or other techniques, such as Galerkin schemes [27], Green function [28] and eigenfunction expansion approaches [29].…”

Section: Introductionmentioning

confidence: 99%

A higher order FEM for time-domain hydroelastic analysis of large floating bodies in an inhomogeneous shallow water environment

Papathanasiou¹,

Karperaki²,

Theotokoglou³

et al. 2015

Proc. R. Soc. A.

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The study of wave action on large, elastic floating bodies has received considerable attention, finding applications in both geophysics and marine engineering problems. In this context, a higher order finite-element method (FEM) for the numerical simulation of the transient response of thin, floating bodies in shallow water wave conditions is presented. The hydroelastic initial-boundary value problem, in an inhomogeneous environment, characterized by bathymetry and plate thickness variation, is analysed for two configurations: (i) a freely floating strip modelling an ice floe or a very large floating structure and (ii) a semi-fixed floating beam representing an ice shelf or shore fast ice, both under long-wave forcing. The variational formulation of these problems is derived, along with the energy conservation principle and the weak solution stability estimates. A special higher order FEM is developed and applied to the calculation of the numerical solution. Results are presented and compared against established methodologies, thus validating the present method and illustrating its numerical efficiency. Furthermore, theoretical results concerning the energy conservation principle are verified, providing a valuable insight into the physical phenomenon investigated.

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Review of hydroelasticity theories for global response of marine structures

Cited by 143 publications

References 45 publications

Coupled MPS-modal superposition method for 2D nonlinear fluid-structure interaction problems with free surface

Coupled MPS-modal superposition method for 2D nonlinear fluid-structure interaction problems with free surface

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

A higher order FEM for time-domain hydroelastic analysis of large floating bodies in an inhomogeneous shallow water environment

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