PREDICTION OF PRESSURE LOADS ON PLANING HULLS IN CALM WATER

The paper presents a theoretical method for estimating the pressure distribution over the wetted area based on the representation of this area by an assemblage of rectangular elements of constant pressure. The pressure on each element is determined from the plan form of the wetted bottom area and the shape of the hull buttock lines. A computer program using this method has been written in FORTRAN and implemented on a CDC 7600 computer. Some results from this program are presented for flat plate and constant deadrise surfaces, both upright and heeled. The data for the upright cases have been compared with other published work and some experimental work has been carried out at the Admiralty Marine Technology Establishment (AMTE), Haslar, formerly AEW, to provide data for comparison with the theory. The method is potentially very flexible and can be used to investigate a number of detailed features commonly found in practice. Particular applications investigated so far include the effect of trailing edge wedges and the interaction between the planing surfaces of stepped hull forms. The performance of cambered buttocks designed to reduce spray and wave-making drag have also been studied.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03060209
• Corporate Authors:

  Royal Institution of Naval Architects

  10 Upper Belgrave Street
  ,   United States 
• Authors:
  • Wellicome, J F
  • Jahangeer, J M
• Publication Date: 1979-3

Media Info

• Pagination: p. 53-70
• Serial:
  • Naval Architect
  • Issue Number: 2
  • ISSN: 0306-0209

Subject/Index Terms

• TRT Terms: Computer programs; Drag; Hulls; Plating (Ships); Pressure
• Uncontrolled Terms: Hull plating; Pressure distribution
• Old TRIS Terms: Computer programs (Pressure distribution); Drag reduction; Hull forms; Wetted surface calculation
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00312344
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 27 1980 12:00AM