Accession Number : ADA117058

Title :   Experimental Program for the Determination of Hull Structural Damping Coefficients.

Descriptive Note : Final rept.,

Corporate Author : UNITED STATES STEEL CORP MONROEVILLE PA RESEARCH LAB

Personal Author(s) : Chang,Pin Yu ; Carroll,Thomas P

PDF Url : ADA117058

Report Date : Sep 1981

Pagination or Media Count : 85

Abstract : A program of full-scale and model experiments for the determination of hull damping coefficients is outlined. A literature survey discusses available data for ship vibration damping, and assesses analytical and experimental techniques used in the past. Existing ship damping data have proven to be inadequate for making reliable vibration predictions. A scheme is discussed for experimentally isolating the damping coefficients associated with each important mode of vibration, as well as the breakdown of the total damping into its separate components (structural, cargo, and hydrodynamic), and the determination of the distribution of the damping along the ship. Excitation devices and analytical methods for reducing the experimental data are discussed, along with specific application to two ships (a 74,000 ton Great Lakes ore carrier, and a 30,000 ton container ship). (Author)

Descriptors :   *Ships, *Vibration, *Damping, Structures, Cargo, Hydrodynamics, Theory, Test methods, Model tests

Subject Categories : Marine Engineering
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE