Accession Number : AD0675639

Title :   THE EFFECT OF SHIP STIFFNESS UPON THE STRUCTURAL RESPONSE OF A CARGO SHIP TO AN IMPULSIVE LOAD.

Descriptive Note : Final rept.,

Corporate Author : NATIONAL ENGINEERING SCIENCE CO PASADENA CALIF

Personal Author(s) : St. Denis,Manley ; Fersht,Samuel N.

Report Date : SEP 1968

Pagination or Media Count : 130

Abstract : The purpose of the study is to set up a computer program to investigate the dynamic effects resulting from an impulsive loading on a ship and to determine how these effects tend to vary with the stiffness of the hull girder. The hull is treated as a Timoshenko beam and the solution is obtained by finite difference technique. Two codes are written: an implicit one, which is more efficient for short durations, and an implicit one, which is superior for long durations of impulse. Application is made to a dry cargo ship. Limited analysis of her response to a unit impulse indicates that, in general, reduced hull rigidity tends to be beneficial. (Author)

Descriptors :   (*CARGO SHIPS, LOADS(FORCES)), SHIP STRUCTURAL COMPONENTS, RESPONSE, BEAMS(STRUCTURAL), MECHANICAL PROPERTIES, EQUATIONS OF MOTION, BENDING, HYDRODYNAMICS

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE