DYNAMIC RESPONSE OF AN OCEAN CONSTRUCTION BARGE TO VARIOUS SEA STATES

Load handling technology in the sea environment to place heavy and bulky loads accurately on the ocean floor is in its preliminary stages of development. The load handling system is usually mounted on a platform which interacts with the sea surface, imparting dynamic loads to the lifting lines that are not experienced on land. This study evaluates the response of a specific load handling system composed of a crane and constant-tension winch mounted on AMMI pontoon barge to sea states 3, 4, and 5. The motions of heave, pitch, and roll were coupled by phasing at specific load suspension points and the rms values of the vertical displacement and acceleration at these points were calculated using spectral analysis techniques. It was found that the constant tension winch could compensate for the motions of sea state 3 but that the probability of exceeding the winch capability in sea state 4 was large enough to limit operations to missions of very short duration.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Ocean Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Donovan, L K
• Publication Date: 1970-9

Subject/Index Terms

• TRT Terms: Barges; Motion; Offshore moorings; Offshore structures; Ship motion
• Old TRIS Terms: Barge motions; Construction barges
• Subject Areas: Bridges and other structures; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00034683
• Record Type: Publication
• Source Agency: Massachusetts Institute of Technology
• Files: TRIS
• Created Date: Sep 29 1973 12:00AM