TUNEABLE HULL PLATE REDUCES PROP VIBRATION

A brief description is given of the CIRR-PSA system, developed by P.F. Hansen, for reducing propeller-induced noise and vibration; a prototype is currently in service on the MV Olav V, a high-speed lifeboat. Basically the device consists of a box built into the hull immediately above the propeller, closed by a hull plate that is faired to the hull lines and is mounted within the box on flexible isolators with an elastomeric seal between the hull plate and the shell plating. The flexible isolators consist of helical coils of wire rope, placed horizontally, and attached to top and bottom spacing and mounting bars. Suitable selection of the hull plate mass and of the stiffness of the isolators enables a 60 to 90% reduction of the transmission of propeller-induced shock forces into the hull structure to be achieved.

• Supplemental Notes:
  • Ocean Ind., 19 <1984>, p. 56 <June> (2 pp., 4 fig.)
• Publication Date: 1984

Language

• English

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00686898
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM