• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1991 Fiscal Year Final Research Report Summary

Study on Dynamic Strength and Vibration of High Speed Ships.

Research Project

Project/Area Number 02302053
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field 船舶構造・建造
Research InstitutionKyushu University

Principal Investigator

OHTAKA Katuo  Kyushu University, Faculty of Eng'g, Professor, 工学部, 教授 (80194182)

Co-Investigator(Kenkyū-buntansha) MORI Masahiro  Nagasaki Institute of Technology, Professor, 教授 (80140937)
MICHIMOTO Jun-ichi  College of Coast Guard, Associate Professor, 助教授 (80106806)
GOUDA Kunio  Tsukuba Univ., Structure Division, Professor, 構造系, 教授 (40134209)
MAEDA Masahiro  Kyushu Univ., Faculty of Eng'g, Research Assistant, 工学部, 助手 (70173713)
YASUZAWA Yukitaka  Kyushu Univ., Faculty of Eng'g, Associate Prof., 工学部, 助教授 (10191123)
Project Period (FY) 1990 – 1991
KeywordsShip Strength / Vibration / Stiffened Plate / High Speed Ship / Submerged Structure
Research Abstract

A. Calculation procedure of longitudinal strength of thin-walled ship has been made which include the effect of shear lag. By this method calculation are made for semi-submersible hydrofoil catamaran and the existence of additional stress near the foil strut has been found in addition to the stress by ordinary beam theory.
B. Simplified calculation method for two-dimensional structures has been developed through combination of finite element method and transfer matrix method.
C. Dynamic strength of internal structural members against shock load is examined by theory and experiment, and the effect of setting angle between plate and stiffener on the strength has been clarified.
D. Vibration characteristics of submerged stiffened plate are investigated under the action of inpla ne load and initial deflection. The following results are obtained.
(1) Vibratory characteristics of the stiffened plate are sensitive to the initial deflection and inp lane load. Effect of initial deflection tends to increase, whereas that of inplane load decrease frequency, the trade-off of which decides the frequency of each structure. Change of frequency mentioned above has close relation to the buckling load and buckling mode shape of plates between stiffeners.
(2) Effect of entrained water on the natural frequency and mode shape has little to do with the init ial deflection and inplane load.
(3) Irregular initial deflection and irregular spacing of stiffeners tends to change the vibratory characteristics considerably, especially mode shapes.
E. Method to identify the vibratory characteristic matrix from measured data has been developed, whic h can be used for high-frequency vibration of high-speed ships.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 前田 正広,山越 道郎: "2次元弾性問題のせん移行列法による解析" 西部造船会会報. 81号. 189-207 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大高 勝夫,安澤 幸隆,西野 宏: "接水防撓板の振動特性" 西部造船会会報. 82号. 229-241 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 西野 宏,安澤 幸隆,大高 勝夫: "面内力を受け初期撓みを有する防撓板の振動" 西部造船会会報. 83号. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 道本 順一: "振動方程式の特性行列の同定に関する研究(その3)" 日本造船学会論文集. 170. 545-554 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] OHTAKA,K,YASUZAWA,Y,NISHINO,H.: "Vibration of Stiffened Plate" 日本造船学会論文集. 172. (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] MAEDA, M. and YAMAKOSHI, M.: "An Analysis of Two Demensional Elastic Problem by Transfer Matrix Method." Transactions of the West-Japan Society of Navel Architectes. No. 81. 189-207 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] OHTAKA, K., YASUZAWA, Y. and NISHINO, H.: "Vibration Characteristics of Stiffened Plate in Contact With Water." Transactions of the West-Japan Society of Navel Architects. No. 82. 229-241 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] NISHINO, H., YASUZAWA, Y. and OHTAKA, K.: "Vibration of Stiffened Plate With Inplane Force and Initial Deflection." Transactions of the West-Japan Society of Navel Architectes. No. 83. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] MICHIMOTO, J.: "Identification of Characteristic Matrices in Vibration Equation." Journal of Society of Naval Architects of Japan. 170. 545-554 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] OHTAKA, K., YASUZAWA, Y. and NISHINO, H.: "Vibration of Stiffened Plats." Journal of Society of Naval Architects of Japan. 172. (1992)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1993-03-16  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi