Through the Ice Mining Study
Abstract
A search for literature relevant to ice penetration by naval mines has shown that interest in the problem has existed since 1952. Early studies were followed by Arctic sea ice penetration tests using instrumented penetrators of varying sizes and weights. Empirical equations for prediction of ice penetration and longitudinal accelerations during ice penetration were originally developed by modification of earth penetration equations. Analysis of all available test data has validated the empirical equations within the originally stated limits of accuracy. Comparable test data appear to confirm the validity for structural tests of penetration testing in gypsite as a simulation of Arctic sea ice for the first few feet of penetration. Very little information exists concerning transverse acceleration and loading in either ice or gypsite. Parametric studies of mine design parameters for a typical moored mine with practical constraints show trends of the weight area factor relationship and the nose shape factor relationship to maximum thickness of ice perforation capability, the payload to penetration relationship and the weight efficiency of the payload in a constrained total weight system. The few data available suggest that the problem of structural survival of transverse loads may be far more severe than that of surviving the longitudinal deceleration forces.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1983
- Accession Number
- ADA174310
Entities
People
- Melvin W. Crawford
- Robert L. Detwiler