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자료유형
학술저널
저자정보
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제23권 제1호
발행연도
2009.2
수록면
74 - 80 (7page)

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In this study, the static and modal analyses to find the characteristic if eigenvalues for a towed cable were with a free boundary condition at the bottom end carried out with numerical study. The resulting numerical code with finite element method was used to study sample problems for a cable with towing speeds. After tracing the equlibrium state with a towing speed through the static analysis, modal analysis on the basis of static results was performed. The static top tension for a critical towing speed is nearly 50 percent of what it was for a free hanging pipe. From static analyses it is found that towing speed has a noticeable effect on top tension of a towed pipe. At a high towing speed, difference between the first and second periods become larger. Compared to the fundamental period for a free hanging pipe, that for a towed pipe with a critical towing speed is approximately 1.4 times larger. This result is very important point in that the lockin condition and tension of the towed cable system with top excitation can be predicted. The corrected close farm solution to solve natural periods for a towed cable was presented in this study. The code is validated by comparison of the results of theoretical and numerical studies. Two results were in very good agrrement. This study can contribute to predicting the lockin condition and tension for a towed cable or pipe with top excitation.

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ABSTRACT
1. 서론
2. 지배방정식
3. 수치해석
4. 수치해석 결과
5. 개발된 알고리즘의 검증
6. 결론
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