Accession Number : AD0651994

Title :   AN INVESTIGATION OF THE SENSITIVITY AND THE LINEARITY OF RESPONSE OF A STEERED SHIP.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY COLL OF ENGINEERING

Personal Author(s) : Chen,Hsao-Hsin

Report Date : FEB 1967

Pagination or Media Count : 158

Abstract : The change of ship response in a zig-zag maneuver due to a small variation of each of the coefficients in the equations of motion was obtained. The degree of the response change, and therefore the sensitivity, is expressed by a non-dimensional parameter. Abkowitz's mathematical model with Chislett and Strom-Tejsen's data for the Mariner class ship are used for this purpose. The nonlinear equations are solved using a numerical technique. Both a dynamically stable and unstable ship were investigated by these techniques. The linear relationship between ship yawing and a harmonic rudder oscillation was found by a specially developed experimental technique. The test results were compared with the theoretical computations of the semi-empirical method. Excellent agreement between experiment and theoretical prediction was obtained. (Author)

Descriptors :   (*SHIPS, MANEUVERABILITY), STEERING, SENSITIVITY, YAW, MARINE RUDDERS, SYSTEM TEST VESSELS, EQUATIONS OF MOTION

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE