NOTES ON THRUSTERS FOR SHIP MANEUVERING AND DYNAMIC POSITIONING

The paper begins with the historical development of thrusters as maneuvering aids. A review of current thruster types and their applications is included. A system of nomenclature is presented in the hope that some degree of standardization can be achieved. Various aspects of mechanical design are discussed, including gears, bearings and seals. Hydrodynamic considerations based on model testing are explored, and a merit coefficient based on the work of Bendemann is proposed for use. Additional full-scale data on the effectiveness of thrusters, the influence of vessel speed on turning moment, and resistance effect are given, and directions for further investigation are suggested. Sources of vibration and noise, both mechanical and hydrodynamic, are examined, and implications of these in various types of service, such as passenger vessels and dynamically positioned drill ships, are explored. Solutions to these problems, such as resilient mountings and blade shape, are presented and discussed. Thruster control sytems are addressed, both conventional maneuvering systems and integration into sophisticated position-keeping systems. The paper concludes with a discussion of ship operators' requirements for thruster installations.

  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Norrby, R A
    • Ridley, D E
  • Publication Date: 1980

Media Info

  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00323479
  • Record Type: Publication
  • Report/Paper Numbers: No. 13
  • Files: TRIS
  • Created Date: Feb 18 1981 12:00AM