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Boussinesq방정식을 이용한 규칙파의 연파해석Stem Wave Analysis of Regular Waves using a Boussinesq Equation

Other Titles
Stem Wave Analysis of Regular Waves using a Boussinesq Equation
Authors
이종인김영택윤성범
Issue Date
Oct-2007
Publisher
한국해안,해양공학회
Keywords
stem waves; regular waves; two-layer Boussinesq equations; higher harmonics; nonlinearity of waves.; 연파; 규칙파; 2층 Boussinesq방정식; 고차 조화성분; 비선형성
Citation
한국해안·해양공학회논문집, v.19, no.5, pp 446 - 456
Pages
11
Indexed
KCI
Journal Title
한국해안·해양공학회논문집
Volume
19
Number
5
Start Page
446
End Page
456
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/44018
ISSN
1976-8192
2288-2227
Abstract
본 연구에서는 Lynett and Liu(2004 a,b)에 의해 유도된 2층 Boussinesq방정식을 이용하여 일정수심상의 규칙파 조건에서 직립벽을 따른 연파를 해석하고, 수리모형실험결과 및 포물형근사식에 의한 해석결과와 비교하였다. 두 가지 수치모형에 의한 해석결과는 수리실험결과와 비교적 잘 일치하였으나, 입사각이 증가할수록 Boussinesq모형이 포물형모형보다 우수한 결과를 주는 것으로 나타났다. 특히 파랑의 비선형성에 의한 고차 조화성분의 발생은 Boussinesq모형에서만 관찰되었다.
Numerical analyses of stem waves, the interaction between incident and reflected waves of obliquely incident regular waves along a vertical wall in a constant water depth, are presented. For the numerical model of the analysis, the two-layer Boussinesq equations developed by Lynett and Liu(2004a,b) are employed. Numerical results are compared with both laboratory measurements and those obtained using parabolic approximation model. The overall comparisons between the results from the two numerical models and the experiments are good. However, the two-layer Boussinesq model is more accurate than the parabolic approximation model as the angle of incident waves increases. In particular, the higher harmonic generation due to the wave nonlinearity is captured only in the Boussinesq model.
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