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原文传递 Numerical Study on Performance of Perforated Breakwater for Green Water

题名：	Numerical Study on Performance of Perforated Breakwater for Green Water
正文语种：	英文
作者：	Rubens Augusto Amaro Jr.1; Liang-Yee Cheng2; Stella Vieira Rosa3
作者单位：	1Ph.D. Student, Dept. of Construction Engineering, Polytechnic School of Univ. of S?o Paulo, Av. Prof. Almeida Prado, Travessa 2, 83—CidadeUniversitária, 05508-070, S?o Paulo, SP, Brazil (corresponding author). 2Professor, Dept. of Construction Engineering, Polytechnic School of Univ. of S?o Paulo, Av. Prof. Almeida Prado, Travessa 2, 83—Cidade Universitária, 05508-070, S?o Paulo, SP, Brazil. 3Graduate Student, Dept. of Mechanical Engineering, Polytechnic School of Univ. of S?o Paulo, Av. Professor Melo Moraes, 2231, Cidade Universitária, 05508-030, S?o Paulo, SP, Brazil.
关键词：	Green water; Hydrodynamic impact; Breakwater; Numerical simulation; Particle method; Moving particle semi-implicit (MPS)
摘要：	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 openarea 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.
出版年：	2019
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
卷：	145
期：	6
页码：	1-19