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비특이화 간접경계적분방정식 방법을 이용한 부유식 구조물의 유체동역학적 거동에 대한 주파수영역 해석Frequency Domain Analysis for Hydrodynamic Responses of Floating Structure using Desingularized Indirect Boundary Integral Equation Method

Other Titles
Frequency Domain Analysis for Hydrodynamic Responses of Floating Structure using Desingularized Indirect Boundary Integral Equation Method
Authors
오승훈정동호조석규남보우성홍근
Issue Date
2019
Publisher
대한조선학회
Keywords
Rankine source method(랜킨 소오스 방법); Desingularized indirect boundary integral equation method (DIBIEM; 비특이화 간접 경계적분방정식 방법); Hydrodynamic response(유체동역학적 응답); Mean wave drift load (시간 평균파랑 표류 하중); Floating structure(부유식 구조물)
Citation
대한조선학회 논문집, v.56, no.1, pp 11 - 22
Pages
12
Journal Title
대한조선학회 논문집
Volume
56
Number
1
Start Page
11
End Page
22
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/364
DOI
10.3744/SNAK.2019.56.1.011
ISSN
1225-1143
Abstract
In this paper, a Rankine source method is applied and validated to analyze the hydrodynamic response of a three-dimensional floating structure in the frequency domain. The boundary value problems for radiation and diffraction problem are solved by using a desingularized indirect boundary integral equation method (DIBIEM). The DIBIEM is simpler and faster than conventional methods based on the numerical surface integration of Green's function because the singularities of Green's function are located outside of fluid regions. In case of floating structure with complex geometry, it is difficult to desingularize the singularities of Green’s function consistently. Therefore a mixed approach is carried out in this study. The mixed approach is partially desingularized except singularities of the body. Wave drift loads are calculated by the middle-field formulation method that is mathematically simple and has fast convergence. In order to validate the accuracy of the developed program, various numerical simulations are carried out and these results are analyzed and compared with previously published calculations and experiments.
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