DEEP UNDERGROUND OPENINGS UNDER NUCLEAR WEAPONS EFFECTS

Award Information
Agency:
Department of Defense
Branch:
Defense Threat Reduction Agency
Amount:
$49,999.00
Award Year:
1988
Program:
SBIR
Phase:
Phase I
Contract:
N/A
Agency Tracking Number:
8604
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Ewa Inc
133 First Ave N, Minneapolis, MN, 55401
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
N/A
Principal Investigator
 DR ANTOUN Y CALASH
 (612) 332-0000
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE SAFE DESIGN OF DEEP MISSILE BASING STRUCTURES SUBJECTED TO STRESS TRANSIENTS GENERATED BY SURFACE DISTURBANCES SUCH AS NUCLEAR OR CONVENTIONAL EXPLOSIONS IS A VERY IMPORTANT PROBLEM FOR J.S. NATIONAL SECURITY INTEREST. THE PROPAGATION OF SURFACE DISTURBANCES THROUGH INHOMOGENEOUS, JOINTED, FRACTURED, AND LAYERED GEOLOGIC MEDIUM OF THE INFINITE DOMAIN IS A VERY COMPLEX PROBLEM ESPECIALLY NEAR DEEP UNDERGROUND OPENINGS/STRUCTURES. THE DEVELOPMENT OF AN OPTIMUM HYBRID NUMERICAL SCHEME COMBINING DIFFERENT NUMERICAL SCHEMES OF INDIVIDUAL SUBDOMAINS SUCH AS DEEP UNDERGROUND STRUCTURE, THINLAYER MEDIUM-STRUCTURE INTERFACE, DISTURBED FIELD NEAR THE OPENING/ STRUCTURE, INTACT FIELD AWAY FROM THE OPENING/STRUCTURE, AND BOUNDARY OF INFINITE DOMAIN IS ESSENTIAL FOR ANALYSIS OF DEEP MISSILE BASING SYSTEMS. PHASE I INVESTIGATION IS TO STUDY THE FEASIBILITY OF AN OPTIMUM HYBRID NUMERICAL SCHEME COMBINING THE FINITE ELEMENT, FINITE DIFFERENCE, DISTRICT ELEMENT, AND BOUNDARY ELEMENT/INFINITE ELEMENT MODELING TECHNIQUES. SUCCESSFUL COMPLETION OF PHASE I STUDY WILL PROVIDE THE FEASIBILITY OF A UNIFIED AND ECONOMICAL SCHEME AS A TOOL TO ANALYZE DEEP UNDERGROUND STRUCTURES SUBJECTED TO SURFACE OR NEAR SURFACE NUCLEAR BURSTS. THIS WILL PROVIDE THE ESSENTIAL FOUNDATION FOR THE DEVELOPMENT OF AN OPTIMUM UNIFIED HYBRID NUMERICAL SCHEME, SOLUTION ALGORITHM AND A COMPUTER CODE FOR THE ANALYSIS OF DEEP MISSILE BASING SYSTEMS.

* information listed above is at the time of submission.

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