INVESTIGATION OF VIBRATIONS IN A PRODUCTION PIPE DURING SHIP HEAVING

Hydraulic transport units are a promising type of equipment that can enable a ship to lift ore from depths of thousands of meters. Such a unit comprises a long pipe attached to the ship by a heaving vibration compensator and a weight attached to the end of the pipe. Flexible piping connects the bottom end of the long pipe to the miner. Ensuring the dynamic stability of these pipes is important. One cause of instability is parametric vibrations that may occur when the frequencies of longitudinal pipe vibrations from the ship's heaving bear certain ratios to the natural frequencies of the system's transverse vibrations in the direction of the vertical axis from ship to seabed. A mathematical study of these parametric vibrations is presented.

• Supplemental Notes:
  • Journal article; DTIC distribution restrictions apply
• Authors:
  • Tikhonov, V S
• Publication Date: 0

Media Info

• Features: References;
• Pagination: 5 p.
• Serial:
  • Sudostroyeniye (Soviet Shipbuilding) [USSR], Issue 7, 1988 (Translated by U.S. Naval Technical Intelligence Center, February 1989)
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Hydraulic equipment; Mining; Ocean bottom; Pipe; Translations; Underwater pipelines; Vibration
• Uncontrolled Terms: Heaving
• Geographic Terms: Former Soviet Union
• Old TRIS Terms: Mining vessels; Ocean mining
• Subject Areas: Bridges and other structures; Data and Information Technology; Marine Transportation;

Filing Info

• Accession Number: 00657146
• Record Type: Publication
• Source Agency: Maritime Technical Information Facility
• Files: TRIS
• Created Date: Jul 21 1994 12:00AM