Research on dynamic instability of plates in high speed ship structure

高速船舶结构板动力失稳研究

• 批准号: 05650947
• 负责人: YASUZAWA Yukitaka
• 金额: $ 1.47万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650947/
• 关键词: Techno Super Liner; Vibration; Panel flutter; divergence; FEA; BEM; 動的不安定; 流体構造連成振動; ダイバージェンス; 構造流体連成振動; 自励振動

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.

为实现运输方式的转变，日本近年来开发了高速船TSL（Techno Super Liner）。这些高速船的外壳表面与快速流动的水接触。这些面板是如此之薄，重量轻，动态不稳定性，如颤振现象可能发生。这种动力不稳定性会导致船体结构的严重倒塌或疲劳裂纹。这类高速船需要研究其动力失稳的可能性，本文的目的是研究船舶外壁板在快速水流作用下发生动力失稳的可能性。采用板的有限元法和周围流体的边界元法对该流固耦合问题进行了数值分析。数值计算程序ISAP-TSL用于研究质量比、各种边界条件对船舶临界速度、相对速度和固有频率降低的影响。此外，从数值结果中讨论了板的动力特性与连续板的动力特性之间的差异。

项目成果

Katsuo Ohtaka: "Vibration of Stiffened Plates" Proc.of Asia-Pacific Vibration Conf.3. 1288-1293 (1993)

Katsuo Ohtaka：“加强板的振动”Proc.of Asia-Pacific Vibration Conf.3。

OHTAKA,O et.al.: "Vibration of Stiffened Plates" Proceeding of Asia-Pacific Vibration Conference '93. vol.3. 1288-1293

OHTAKA,O 等人：“加强板的振动”，亚太振动会议 93 论文集。

Yukitaka YASUZAWA: "Dynamic Instability Analysis of a Thin Plate in contact with water" Proc.of The Teuth Asian Technical Exchrnge and Advtsary Moeting. 1. 449-458 (1996)

Yukitaka YASUZAWA：“薄板与水接触的动态不稳定性分析”Proc.of The Teuth Asian Technical Exchrnge 和 Advtsary Moeting。

Yasuzawa, Y.et.al.: "Dynamic Instability Analysis of a Thin Plate in contact with a Rapid Flow" Proceedings of The Tenth Asian Tecnical Exchange and Advisary Meeting, on Marine Structures. 449-458

Yasuzawa, Y.et.al.：“与快速流接触的薄板的动态不稳定性分析”第十届亚洲海洋结构技术交流和咨询会议论文集。