해저지진의 수직지반운동에 의한 부유식 해양구조물의 지진응답 해석기법 개발

서지정보

ㆍ발행기관 : 한국지진공학회 ㆍ수록지정보 : Jorunal of the Earthquake Engineering Society of Korea / 18권 / 6호
ㆍ저자명 : 이진호, 김재관, 진병무

목차

A B S T R A C T
1. 서 론
2. 부유식 해양구조물의 운동방정식
3. 구조물에 작용하는 유체의 동수압
3.1 유체 근역의 운동방정식
3.2 유체 원역의 운동방정식
3.3 유체 원역의 자유장 문제
3.4 유체 원역의 파 방사 문제
3.5 구조물에 작용하는 동수압
4. 부유식 해양구조물 시스템의 운동방정식
5. 검증 및 적용 예제
5.1 자유장 해석
5.2 무질량 강체 원형판의 강제진동 해석
5.3 부유식 해양구조물의 지진응답 해석
6. 결 론
감사의 글
REFERENCES
부 록. 무질량 강체 원형판의 강제진동에 대한 해석해

영어 초록

Considering a rigorously fluid-structure interaction, a method for an earthquake response analysis of a floating offshore structure subjected to vertical ground motion from a seaquake is developed. Mass, damping, stiffness, and hydrostatic stiffness matrices of the floating offshore structure are obtained from a finite-element model. The sea water is assumed to be a compressible, nonviscous, ideal fluid. Hydrodynamic pressure, which is applied to the structure, from the sea water is assessed using its finite elements and transmitting boundary. Considering the fluid-structure interaction, added mass and force from the hydrodynamic pressure is obtained, which will be combined with the numerical model for the structure. Hydrodynamic pressure in a free field subjected to vertical ground motion and due to harmonic vibration of a floating massless rigid circular plate are calculated and compared with analytical solutions for verification. Using the developed method, the earthquake responses of a floating offshore structure subjected to a vertical ground motion from the seaquake is obtained. It is concluded that the earthquake responses of a floating offshore structure to vertical ground motion is severely influenced by the compressibility of sea water.

참고 자료

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