SPH MODELLING OF TSUNAMI WAVE IMPACT ON LOW-RISE STRUCTURES

This study examines the influence of low-rise structure orientations on tsunami-induced impact force. The particular focus is on low-rise structures since these often make up the majority of building stock in tsunami prone areas and are usually most vulnerable. The meshless method smoothed particle hydrodynamics (SPH) is used for simulating the tsunami flow. Multiple cube structures named A, B and C were arranged at different angles of rotation and were situated on a flat shore. Four cases were simulated with variation on the number of structures and orientation toward the tsunami direction. Case 1 comprises a single structure (SS) C without rotation (R=0 degrees) and used as the baseline, Case 2 contains multiple structures (MS) A, B and C without rotation (R=0 degrees), Case 3 includes multiple structures (MS) A, B and C with 30 degree rotation (R=30d egrees), and Case 4 consist of multiple structures (MS) A, B and C with 45 degree rotation (R=45 degrees). The simulations show that for a 2-solitary wave train the front structures generated a flow focusing effect that accelerated the bore velocity. The orientation of the multiple structures to the direction of the oncoming tsunami bore significantly affected the magnitude of the applied force, where the most effective structure orientation is provided by the 45-degree rotation. The results of this study emphasize the potential for improving tsunami resilience through appropriate positioning of structures. Importantly, such large reductions in force may provide an economic solution to building resilience in developing countries prone to tsunamis.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/WNtyTNzQ7yY

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Three-dimensional wave impact on a rigid structure using smoothed particle hydrodynamics

International Journal for Numerical Methods in Fluids ◽

10.1002/fld.3690 ◽

2012 ◽

Vol 69 (9) ◽

pp. 1566-1566

Author(s):

S. J. Cummins ◽

T. B. Silvester ◽

P. W. Cleary

Keyword(s):

Smoothed Particle Hydrodynamics ◽

Three Dimensional ◽

Wave Impact ◽

Rigid Structure ◽

Particle Hydrodynamics ◽

Smoothed Particle ◽

Dimensional Wave

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Numerical Simulations of Regular Wave Impact on Horizontal Plate Based on SPH Methods

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.353-356.3531 ◽

2013 ◽

Vol 353-356 ◽

pp. 3531-3536

Author(s):

Kun Zheng ◽

Zhao Chen Sun ◽

Chang Ping Chen ◽

Feng Zhou

Keyword(s):

Estimation Method ◽

Impact Pressure ◽

Horizontal Plate ◽

Regular Waves ◽

Wave Impact ◽

Numerical Wave Flume ◽

Wave Flume ◽

Particle Hydrodynamics ◽

Smoothed Particle ◽

The Impact

The numerical wave flume was established for simulating the impact effects of regular waves on horizontal plate by adopting the method of Smoothed Particle Hydrodynamics (SPH).The impact process of regular waves on horizontal plate was analyzed, and the impact pressure-time curves were gotten using a new estimation method. The comparison of numerical results and experimental results shows that the new estimation method can predict the peak impact pressure more accurately.

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Smoothed Particle Hydrodynamics Simulation of Wave Overtopping Characteristics for Different Coastal Structures

The Scientific World JOURNAL ◽

10.1100/2012/163613 ◽

2012 ◽

Vol 2012 ◽

pp. 1-10 ◽

Cited By ~ 6

Author(s):

Jaan Hui Pu ◽

Songdong Shao

Keyword(s):

Porous Material ◽

Smoothed Particle Hydrodynamics ◽

Free Particle ◽

Fluid Pressure ◽

Wave Structure ◽

Wave Impact ◽

Wave Overtopping ◽

Coastal Structure ◽

Particle Hydrodynamics ◽

Smoothed Particle

This research paper presents an incompressible smoothed particle hydrodynamics (ISPH) technique to investigate a regular wave overtopping on the coastal structure of different types. The SPH method is a mesh-free particle modeling approach that can efficiently treat the large deformation of free surface. The incompressible SPH approach employs a true hydrodynamic formulation to solve the fluid pressure that has less pressure fluctuations. The generation of flow turbulence during the wave breaking and overtopping is modeled by a subparticle scale (SPS) turbulence model. Here the ISPH model is used to investigate the wave overtopping over a coastal structure with and without the porous material. The computations disclosed the features of flow velocity, turbulence, and pressure distributions for different structure types and indicated that the existence of a layer of porous material can effectively reduce the wave impact pressure and overtopping rate. The proposed numerical model is expected to provide a promising practical tool to investigate the complicated wave-structure interactions.

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Rogue Wave Impact on a Semi-Submersible Offshore Platform

Volume 5: Materials Technology; CFD and VIV ◽

10.1115/omae2008-57705 ◽

2008 ◽

Cited By ~ 1

Author(s):

Murray Rudman ◽

Paul Cleary ◽

Justin Leontini ◽

Matthew Sinnott ◽

Mahesh Prakash

Keyword(s):

Rogue Wave ◽

Three Dimensional ◽

Breaking Waves ◽

Attractive Alternative ◽

Wave Impact ◽

Particle Hydrodynamics ◽

Smoothed Particle ◽

Dimensional Simulation ◽

The Impact ◽

Structural Motion

Full three-dimensional simulation of the impact of a rogue wave on a semi-submersible platform is undertaken using the Smoothed Particle Hydrodynamics (SPH) technique. Two different mooring configurations are considered: A Tension Leg Platform (TLP) system and a Taut Spread Mooring (TSM) system. It is seen that for a wave impact normal to the platform side, the heave and surge responses of the platform are significantly different for the two mooring systems. The TLP system undergoes large surge but comparatively smaller heave motions than the TSM system. The degree of pitch is very similar. The total tension in the mooring cables is approximately four times higher in the TSM system and exceeds the strength of the cables used in the simulation. SPH is seen to be an attractive alternative to standard methods for simulating the coupled interaction of highly non-linear breaking waves and structural motion.

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A Coupled SPH-Spectral Method for the Simulation of Wave Train Impacts on a FPSO

Volume 2: CFD and VIV ◽

10.1115/omae2014-24679 ◽

2014 ◽

Cited By ~ 2

Author(s):

G. Oger ◽

D. Le Touzé ◽

G. Ducrozet ◽

J. Candelier ◽

P.-M. Guilcher

Keyword(s):

Spectral Method ◽

Complex Geometry ◽

Wave Train ◽

Floating Body ◽

Dynamic Impact ◽

Particle Hydrodynamics ◽

Smoothed Particle ◽

High Dynamic ◽

Complementary Techniques ◽

Correct Design

In order to help in achieving a correct design of structures subjected to wave impacts, CFD tools with a sufficient accuracy should be developed. But nowadays, modelling accurately both wave propagations and the resulting impact of a wave train on a complex geometry is still challenging. This paper deals with the introduction of a weak coupling between a Spectral method and Smoothed Particle Hydrodynamics (SPH), used as complementary techniques for modelling respectively wave propagation and high-dynamic impact of a wave train on a complex-shaped floating body. Comparisons with experiments are provided as a validation of these preliminary developments.

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