HULL VIBRATION INDUCED BY SHORT SWELLS; A STUDY OF SPRINGING VIBRATION

The lenghth of waves which induce the springing vibration is considered to be one tenth of the length of the ship, and such short waves rarely contribute to the pitching motion of the ship, due to the difference of the ship, and difference of these frequencies. Accordingly, it is considered that, in proportion to the ship size increase, vibration exciting energy will be rapidly increased, because of the enlargement of the fluctuation of vertical acceleration together with the buoyancy at both ends of ship, and the increase of these bending levers. The results confirm that large ships like VLCC's or ULCC's have a sufficient possiblity for the springing vibration induced by comparatively regular short swells and though the probability of the appearance of this phenomenon is a separate problem, due to the increase of ship size, the magnitude of the springing vibration will rapidly increase to a serious level.

• Supplemental Notes:
  • First Report Contribution A, No. 98 from the Faculty of Marine Science and Technology, Tokai Univeristy.
• Corporate Authors:

  Tokai University

  Shimizu,   Japan 
• Authors:
  • Tsunoda, R
• Publication Date: 1976-3

Media Info

• Pagination: p. 73-78
• Serial:
  • Faculty of Marine Science & Technology, Journal of
  • Issue Number: 9
  • Publisher: Tokai University

Subject/Index Terms

• TRT Terms: Hulls; Vibration
• Old TRIS Terms: Hull springing; Hull vibration
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00144278
• Record Type: Publication
• Source Agency: Tokai University, Japan
• Files: TRIS
• Created Date: Jan 16 1977 12:00AM