무한수심 부유체의 부가질량계수와 감쇠계수 결정을 위한 신 방법

• 영문명: A New Method for determining Added Mass and Damping Coefficients of Floating Objects in Infinite Water Depth: Residue Integration of Singular Free Surface Term
• 발행기관: 한국연안방재학회
• 저자명: 전인식(Insik Chun) 오병철(Byungcheol Oh) 김동하(Dong-Ha Kim) 심재설(Jaeseol Shim)
• 간행물 정보: 『한국연안방재학회지』제8권 제1호, 21~27쪽, 전체 7쪽
• 주제분류: 사회과학 > 사회과학일반
• 파일형태: PDF
• 발행일자: 2021.01.30

영문 초록

It has been the case that the added mass and damping coefficients of a floating body are determined differently depending on the water depth condition which is finite or infinite. In the present study, Green functions for the finite and infinite depth conditions are compared, and a new method based on residue integration technique is proposed to determine the singular integral of the free surface term in the Green function of infinite water depth. The new method is semi-analytic in that it does not depend on any approximate transcendental functions or numerical calculations as generally appeared in the existing methods. Hence, it can be more advantageous in both accuracy and calculation time. The method is numerically implemented to a floating hemisphere. The results are compared with those of existing numerical studies, and they showed nice agreements. The depth criterion to judge whether to use finite or infinite water depth is discussed as well.

목차

1. 서 론

2. 수심조건 별 그린함수의 비교

3. 특이점적분의 수치해석

4. 수치해석의 적용

5. 유한수심과 무한수심의 판별에 대한 고찰

6. 결 론

감사의 글

References

키워드

floating structures added mass coefficient radiation damping coefficient singularity distribution method Green function