Preliminary Assessment of Lighter Damping Augmentation in Heave for Reduction of Relative Motion

Abstract

The concept of augmenting the inherent damping of a lighter hull to suppress its heave response in waves, and thereby to reduce relative motion between a cargo ship and lighter is the subject of investigation. The scope of the effort was a minimum one to rapidly assess the promise of the concept. A primarily empirical approach was taken. Sufficient analysis was included to interpret the test results and to consider the implications of the results in full scale. Model tests were performed in a model basin with wave making facility. The model consisted of a one-sixth scale hull for a 45 ft. long patrol boat with its damping appendage slats, one or two high, longitudinally aligned on either side.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1972
Accession Number
AD0756690

Entities

People

  • Sidney Berger

Tags

DTIC Thesaurus Topics

  • Boats
  • Control Systems
  • Engineering
  • Frequency
  • Intact Stability
  • Measurement
  • Model Basins
  • Model Tests
  • Physical Properties
  • Relative Motion
  • Resonance
  • Resonant Frequency
  • Scale Models
  • Ships
  • Sine Waves
  • Vibration
  • Waves

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Marine Hydrodynamics
  • Systems Analysis and Design