Research on dynamic instability of plates in high speed ship structure

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Research on dynamic instability of plates in high speed ship structure

Format:
Grant
Kyushu Univ. Production Kyushu Univ. Production
Title(Other Language):
超高速船外板の水中パネルフラッターに関する研究
Responsibility:
安澤 幸隆(九州大学・工学部・助教授)
YASUZAWA Yukitaka(九州大学・工学部・助教授)
Language:
Japanese
Project Year:
1993-1994
Latest Report:
High speed ships TSL (Techno Super Liner) have beecn developed recently for realization of modal-shift of transportation in Japan. The shell surfaces of these high speed ships are in contact with a rapid flow of water. These panels are so thin for light weight that dynamic instability like flutter phenomena can occur. Such dynamic instablity can cause a drastic collapse or fatigue cracks in the ship structure. The possibility of dynamic instability should be studied for this kind of high speed ship. The purpose of the present study is to investigate the possibility of dynamic instability of the outer panels of ships due to rapid flow of water. Finite element approach for plates and boundary element approach for surrounding fluid are used for the numerical analysis of this fluid-structure interaction problems. The numerical code, ISAP-TSL,developed in the study is used for investigation of the effect of mass ratio, various boundary conditions on critical speed of relative speed of the ship and the reduction of natural frequencies. Moreover the difference between the dynamic characteristics of the plate and those of a continuous plate is discussed from the numerical results. Read more
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