Accession Number : AD0709072

Title :   THE FRANK CLOSE-FIT SHIP-MOTION COMPUTER PROGRAM.

Descriptive Note : Final rept.,

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER WASHINGTON D C

Personal Author(s) : Frank,Werner ; Salvesen,Nils

Report Date : JUN 1970

Pagination or Media Count : 144

Abstract : The report is a manual for 'The Frank Close-Fit Ship-Motion Computer Program.' The input and output schemes and the theory are explained in detail. The program computes pitch and heave motions for ships in regular and irregular head waves. The regular wave responses are computed according to an improved version of the Korvin-Kroukovsky strip theory. The irregular seaway is represented by the Pierson-Moskowitz Sea Spectrum and statistical response parameters are computed for pitch and heave as well as for absolute and relative vertical displacment, velocity and acceleration at any point along the length of the ship. A comparison between theory and experiment of the pitch and heave amplitudes and phases for five hull forms is presented and the agreement is satisfactory for both common cruiser-stern ships and high-speed destroyers and also for hulls with large bulbs and sonar arrays. (Author)

Descriptors :   (*SHIPS, *MOTION), (*COMPUTER PROGRAMS, HYDRODYNAMICS), CARGO SHIPS, CRUISERS, DESTROYERS, OCEAN WAVES, PITCH(MOTION), SHIP HULLS, SONAR ARRAYS

Subject Categories : Computer Programming and Software
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE