Wave load on submerged quarter-circular and semicircular breakwaters under irregular waves

Xue Lian Jiang, Qing Ping Zou, Na Zhang

Research output: Contribution to journalArticle

Abstract

Laboratory experiments were conducted to investigate the characteristics of wave loading on submerged circular-front breakwaters due to irregular waves. The wave force spectrum for a semicircular breakwater is similar to that for a quarter-circular breakwater. The dimensionless peak wave force for irregular waves is less than that for regular waves. The performance of our theoretical wave load model is improved significantly by incorporating the effect of wave transmission and flow separation. A RANS-VOF model was used to investigate the effect of local hydrodynamic disturbances by submerged breakwaters on the pressure distribution around the breakwater and total wave load. The numerical results reveal that wave-induced vortices at the structure have a substantial influence on the wave loading on the submerged quarter-circular breakwater but not on the semicircular breakwater. A parametric analysis is required to further improve the relationship between wave loads and the vortices.

Original languageEnglish
Pages (from-to)265-277
Number of pages13
JournalCoastal Engineering
Volume121
Early online date30 Jan 2017
DOIs
Publication statusPublished - 1 Mar 2017

Fingerprint

Breakwaters
Vortex flow
Flow separation
Wave transmission
Pressure distribution
Hydrodynamics

Keywords

  • Irregular waves
  • Pressure
  • Submerged circular-front breakwaters
  • Vorticity
  • Wave load model

ASJC Scopus subject areas

  • Environmental Engineering
  • Ocean Engineering

Cite this

@article{f8c3bd3e144542e3b69b2c01fe49149b,
title = "Wave load on submerged quarter-circular and semicircular breakwaters under irregular waves",
abstract = "Laboratory experiments were conducted to investigate the characteristics of wave loading on submerged circular-front breakwaters due to irregular waves. The wave force spectrum for a semicircular breakwater is similar to that for a quarter-circular breakwater. The dimensionless peak wave force for irregular waves is less than that for regular waves. The performance of our theoretical wave load model is improved significantly by incorporating the effect of wave transmission and flow separation. A RANS-VOF model was used to investigate the effect of local hydrodynamic disturbances by submerged breakwaters on the pressure distribution around the breakwater and total wave load. The numerical results reveal that wave-induced vortices at the structure have a substantial influence on the wave loading on the submerged quarter-circular breakwater but not on the semicircular breakwater. A parametric analysis is required to further improve the relationship between wave loads and the vortices.",
keywords = "Irregular waves, Pressure, Submerged circular-front breakwaters, Vorticity, Wave load model",
author = "Jiang, {Xue Lian} and Zou, {Qing Ping} and Na Zhang",
year = "2017",
month = "3",
day = "1",
doi = "10.1016/j.coastaleng.2016.11.006",
language = "English",
volume = "121",
pages = "265--277",
journal = "Coastal Engineering",
issn = "0378-3839",
publisher = "Elsevier",

}

Wave load on submerged quarter-circular and semicircular breakwaters under irregular waves. / Jiang, Xue Lian; Zou, Qing Ping; Zhang, Na.

In: Coastal Engineering, Vol. 121, 01.03.2017, p. 265-277.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Wave load on submerged quarter-circular and semicircular breakwaters under irregular waves

AU - Jiang, Xue Lian

AU - Zou, Qing Ping

AU - Zhang, Na

PY - 2017/3/1

Y1 - 2017/3/1

N2 - Laboratory experiments were conducted to investigate the characteristics of wave loading on submerged circular-front breakwaters due to irregular waves. The wave force spectrum for a semicircular breakwater is similar to that for a quarter-circular breakwater. The dimensionless peak wave force for irregular waves is less than that for regular waves. The performance of our theoretical wave load model is improved significantly by incorporating the effect of wave transmission and flow separation. A RANS-VOF model was used to investigate the effect of local hydrodynamic disturbances by submerged breakwaters on the pressure distribution around the breakwater and total wave load. The numerical results reveal that wave-induced vortices at the structure have a substantial influence on the wave loading on the submerged quarter-circular breakwater but not on the semicircular breakwater. A parametric analysis is required to further improve the relationship between wave loads and the vortices.

AB - Laboratory experiments were conducted to investigate the characteristics of wave loading on submerged circular-front breakwaters due to irregular waves. The wave force spectrum for a semicircular breakwater is similar to that for a quarter-circular breakwater. The dimensionless peak wave force for irregular waves is less than that for regular waves. The performance of our theoretical wave load model is improved significantly by incorporating the effect of wave transmission and flow separation. A RANS-VOF model was used to investigate the effect of local hydrodynamic disturbances by submerged breakwaters on the pressure distribution around the breakwater and total wave load. The numerical results reveal that wave-induced vortices at the structure have a substantial influence on the wave loading on the submerged quarter-circular breakwater but not on the semicircular breakwater. A parametric analysis is required to further improve the relationship between wave loads and the vortices.

KW - Irregular waves

KW - Pressure

KW - Submerged circular-front breakwaters

KW - Vorticity

KW - Wave load model

UR - http://www.scopus.com/inward/record.url?scp=85010869352&partnerID=8YFLogxK

U2 - 10.1016/j.coastaleng.2016.11.006

DO - 10.1016/j.coastaleng.2016.11.006

M3 - Article

VL - 121

SP - 265

EP - 277

JO - Coastal Engineering

JF - Coastal Engineering

SN - 0378-3839

ER -