Journal of Korean Society of Coastal and Ocean Engineers (한국해안해양공학회지)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Reflection and Transmission of Submerged Breakwater due to Wave Groups

파군특성에 따른 잠제의 반사와 투과

  • Published : 2001.03.01
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Abstract

The effects of wave groups on reflection and transmission over a submerged breakwater are studied by using a hydrodynamic numerical model and five independent wave grouping parameters. Based on qualitative analyses of limited data, it is found that the reflection and transmission coefficients of submerged breakwater may be strongly correlated with the incident wave groups. The reflection and transmission coefficients tend to decrease as wave groups become relatively larger. In particular, the reflection and transmission coefficients due to wave groups are evaluated smaller than those of single incident waves. However, the reflection and transmission coefficients are not affected by the interval of higher wave groups. It is finally concluded that the mean of nul-length among wave grouping parameters can be an useful parameter for correlating the wave groups with the reflection and transmission coefficients of submerged breakwater.

천해영역에서 적용 가능한 동수역학적 수치모형을 이용하여 규칙 입사파군이 수직으로 입사할 때 잠제에 의하여 발생되는 반사와 투과의 거동 특성을 해석하였다. 여러 입사파군 조건에서 계산된 잠제의 반사율과 투과율이 파군의 발달정도를 해석하기 위하여 제시된 변수들의 함수로 표시되었다. 입사파군과 잠제의 반사율 및 투과율의 관계를 정성적으로 해석한 결과, 고파군이 발달될수록 잠제에 의하여 발생되는 입사파랑의 반사율과 투과율의 크기가 감소하는 것으로 나타났다. 특히 파군으로 입사하는 경우의 반사율과 투과율이 단일 파랑으로 입사하는 경우의 반사율과 투과율에 비하여 상대적으로 작게 나타났다. 그러나 고파군과 고파군의 간격에 따른 반사율과 투과율의 차이는 크지 않은 것으로 나타났다. 비록 제한적이지만 본 연구에서 해석된 결과에 의하면 파랑 연이음의 평균을 이용할 때 입사파군과 잠제의 반사율 및 투과율의 관계가 가장 잘 해석될 수 있다.

Keywords

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