Call number:
ZSP-201-84/7
In:
CRREL Report, 84-7
Description / Table of Contents:
Experiments were conducted in CRREL's refrigerated flume facility to examine the two-dimensional force distribution of a floating, fragmented ice cover restrained by a boom in a simulated river channel. To determine the force distribution, a vertically walled channel, instrumented for measuring normal and tangential forces, and an instrumented restraining boom were installed in a 40.0- by 1.3-m flume. Two sizes of polyethylene blocks and two similar sizes of fresh-water ice blocks were tested using water velocities ranging from 10 to 30 cm/s. The forces measured at the instrumented boom leveled off with increasing cover length. The contribution of the increasing shear forces developed along theshorelines to this leveling off in the data was clearly evident. The shear coefficients of the polyethylene blocks averaged 0.43, and the freshwater ice averaged 0.044. The normal force measured along the instrumented shoreline could not be related simply by a K coefficient to the longitudinal force; another expression was required, with a term being a function of the cover thickness and independent of the undercover shear stress or cover length. By adding this term, good agreement was then found between the measured and predicted values of the boom forces and the shoreline normal and shear forces
Type of Medium:
Series available for loan
Pages:
iv, 22 Seiten
,
Illustrationen
Series Statement:
CRREL Report 84-7
URL:
https://apps.dtic.mil/dtic/tr/fulltext/u2/a142100.pdf
URL:
https://hdl.handle.net/11681/9284
Language:
English
Note:
CONTENTS
Abstract
Preface
Introduction
Experiments
Test flume facility
Experimental apparatus
Experimental procedure
Results
Plastic versus freshwater ice
Shoreline forces
Boom forces
Average shear stress under ice cover
Internal forces
Discussion
Data scatter
Summary and conclusions
Literature cited
Appendix A: Experimental results
Location:
AWI Archive
Branch Library:
AWI Library
