Numerical Study on Performance of Perforated Breakwater for Green Water
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 145, Issue 6
Abstract
In this work, the influence of the geometry of lightweight perforated breakwaters on its performance against green water impact loads is investigated systematically through a series of numerical simulations. For this purpose, a fully Lagrangian meshfree particle-based method is adopted to model transient and impulsive hydrodynamic phenomenon with free surface and complex geometry. The green water flow is represented by a dam-break problem; the breakwater is modeled as a perforated plate and the protected installation as a vertical wall. Computed impact force, moment, and impulse on the breakwater and protected wall show nonlinear effects, and the main geometric parameter is the open-area ratio. In addition, the increase in the breakwater height is effective only for low open-area ratios. The influence of the arrangement of the holes are also investigated. Different flow patterns are obtained for small and large gaps between the breakwater and the wall. The relation between the loads on the breakwater and the wall also provides the basis for the optimal design of the breakwater, considering the tolerant hydrodynamic loads of protected structures.
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Acknowledgments
This work has financial support from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001 and FAPESP Proc. No. 2015/10287-0. The authors are grateful to Petrobras for financial support on the development of the MPS/TPN-USP simulation system based on the MPS method. The authors would like to express sincere thanks to D.Sc. Daniel Fonseca de Carvalho e Silva for valuable discussions.
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Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 145 • Issue 6 • November 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Apr 30, 2018
Accepted: Feb 20, 2019
Published online: Aug 29, 2019
Published in print: Nov 1, 2019
Discussion open until: Jan 29, 2020
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