Analyzing the Stability of Floating Ice Floes,

Abstract

This report describes an experimental study to measure the pressure caused by fluid acceleration beneath a floating parallelepiped block. Dynamic fluid pressure was measured at discrete points beneath the block for several flow velocities, flow depths, block angles of attack and block-thickness-to-depth ratios. The measured pressures were used to calculate block underturning moments, and a hydrostatic analysis was used to calculate a block righting moment. From this, a densimetric Froude undertuming criterion is presented. The measured hydrodynamic pressure distribution on the bottom of a single model ice floe is used to estimate the dynamic stability at three thickness-to-depth ratios. The energy-based analysis details the conditions required for instability, metastability and stability. At three thickness-to-depth ratios, block rotational inertia has the effect of reducing the Froude stability number by 5 to 10% over a completely static stability criterion. (MM)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1994
Accession Number
ADA292149

Entities

People

  • Barry Coutermarsh
  • Randy Mcgilvary

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Angular Acceleration
  • Angular Momentum
  • Cold Regions
  • Deep Water
  • Fluid Flow
  • Fluid Mechanics
  • Froude Number
  • Geometry
  • Instability
  • Kinetic Energy
  • Metastable State
  • Phase
  • Pressure Distribution
  • Pressure Measurement
  • Shallow Water
  • Strouhal Number
  • Thickness

Readers

  • Fluid Dynamics.
  • Marine Hydrodynamics
  • Polar and Arctic Studies