OPTIMIZATION OF CATAMARAN DEMIHULL FROM WAVE RESISTANCE STAND POINT

The author has developed a computer program intended to find a catamaran satisfying a set of design requirements (displacement, hull spacing and speed) with a minimum wave resistance. The optimal source distribution generated by a given set of constraints regarding the water plane, is not necessarily an optimal source of distribution with respect to distributions generated by any other set of constraints. for each Froude number there must exist an optimal set of contraints with the property that the ship generated under these constraints satisfies the design requirements and has a minimum wave resistance. The computer program developed by the author will find the optimal set of constraints for each Froude number and will print out the shape, the length and the wave resistance coefficient of the ship generated by the optimal constraints. The wave resistance coefficients of that ship at speeds other than the design speed are also computed and printed out for both the design hull spacing and for infinite hull spacing so that the user can compute the interference factor for each speed. The ship with smallest wave resistance coefficient will be considered the optimal ship and the length of that ship is considered the optimal length. The program has been provided with an alternative which once the optimal ship has been defined, will develop a systematic variation of the hull spacing until the optimal hull spacing for the optimal length (Froude number) has been found and printed out. The alternative of finding the optimal length and that of finding the optimal hull spacing work independently and used carefully by a naval architect will help in finding a virtually optimal solution.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Ocean Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Popescu, C
• Publication Date: 1973-5

Subject/Index Terms

• TRT Terms: Catamarans; Fluid resistance; Hydrodynamics; Ship motion; Ships; Wave resistance
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00048356
• Record Type: Publication
• Source Agency: Massachusetts Institute of Technology
• Report/Paper Numbers: MS Thesis
• Files: TRIS
• Created Date: Nov 14 1973 12:00AM