Experimental Program for the Determination of Hull Structural Damping Coefficients.

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)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1981
Accession Number
ADA117058

Entities

People

  • Pin Yu Chang
  • Thomas P. Carroll

Organizations

  • U.S. Steel

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Coast Guard
  • Control Systems
  • Hydraulic Actuators
  • Measurement
  • Mechanics
  • Model Basins
  • Model Tests
  • Modulus Of Elasticity
  • Naval Architecture
  • Plastic Explosives
  • Resonant Frequency
  • Ship Decks
  • Ship Model Basins
  • Ship Models
  • Structural Components
  • Test And Evaluation
  • Test Facilities

Readers

  • Marine Hydrodynamics
  • Structural Dynamics.
  • Systems Analysis and Design