Large Waves in Channels

Period of Performance: 01/01/1988 - 12/31/1988

$470K

Phase 2 SBIR

Recipient Firm

Engineering Methods
9086 Cypress Green Dr
Jacksonville, FL 32216
Principal Investigator

Research Topics

Abstract

PHASE I REVEALED THAT LONG EXPLOSION WAVES IN CHANNELS SUCH AS HOOD CANAL MAY EXPERIENCE AMPLIFICATIONS IN HEIGHT AT THE BANKS OF A FACTOR OF TWO OR MORE. THIS BEHAVIOR GREATLY STRENGTHENS THE DAMAGE POTENTIAL OF EXPLOSION GENERATED WATER WAVES WHICH MAY PROPAGATE FOR GREAT DISTANCES IN CHANNELS WITH LITTLE ATTENUATION. AN EXTREMELY DESTRUCTIVE BREAKING ZONE MIGHT SWEEP THE CHANNEL BANKS FOR A DISTANCE OF MANY MILES FOLLOWING DETONATION OF A DEVICE OF MODERATE YIELD. THIS BEHAVIOR HAS BEEN OBSERVED IN NATURE AFTER A LANDSLIDE (ENERGY COMPARABLE TO 100 KT) PRODUCED EDGE BORES WHICH SWEPT TREES TO 200 FOOT ELEVATION FOR A LENGTH OF SEVERAL MILES. PHASE I PRESENTED SEMI-QUANTITATIVE ESTIMATES USING PRELIMINARY THEORIES. WORK IS PROPOSED TO ESTABLISH WAVE PROFILES, VELOCITIES, ACCELERATIONS, AND BREAKING CHARACTERISTICS. THE PROPOSED WORK INCLUDES ANALYTICAL, NUMERICAL, AND EXPERIMENTAL EFFORTS (EXPERIMENTS TO BE PERFORMED BY OTHER DNA CONTRACTORS).