| NUDACC(Nuclear Damage Assessment Computer Code) Programmer's Guide: Version II |
JUN 1981 |
|
| Authors:
Timothy M. Geipe; HARRY DIAMOND LABS ADELPHI MD
|
 | This report serves as a second version to the Nuclear Damage Assessment Computer Code (NUDACC) Programmer's Guide (HDL-SR-80-1). The initial report served as a user's manual for the analyst or the programmer interested in installing and using NUDACC. As such, the initial report contained a description of NUDACC methodology as well as detailed descriptions of file structure, mass storage requirements, and logic flow. Recent major improvements in the computer code ... |
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| A Detailed Comparison of 3-D Hydrocode Computations for Shock Diffraction Loading on an S-280 Electrical Equipment Shelter |
JUN 1981 |
101 pages |
| Authors:
Richard E. Lottero; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
 | The normal shock diffraction loading on an S-280 Electrical Equipment Shelter (essentially a rectangular parallelepiped) by a 34.5 kPa (5.0 psi) shock is reported. Two different three-dimensional hydrodynamic computer codes, BAAL from the Los Alamos Scientific Laboratory and HULL from the Air Force Weapons Laboratory, were used. The results from the two hydrocodes are compared with one another, showing good agreement, and with two existing semiempirical models. Improvements to these ... |
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| Electrical Noise Problems Associated with Cable and Gage Failure During Explosive Testing |
JUN 1981 |
20 pages |
| Authors:
F. P. Hanes; F. P. Leake; G. P. Bonner; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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| Electrical noise and cross talk generated during explosive testing by gage and cable destruction were investigated. Results indicate that the primary instrumentation parameters affecting noise and cross talk levels are cable type, transducer bridge symmetry and its effects on signal conditioner common mode rejection ratio, and the degree of isolation between conditioner power circuits. (Author) |
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| Detection, Location and Identification of Explosions and Earthquakes using Regional Seismic Data Recorded at a Single Station |
JUN 1981 |
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| Authors:
J. R. Murphy; SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
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| This report summarizes the results of an analysis of the various factors affecting the detection, location and event identification capability of a single seismic station in the regional distance range. A regional seismic detection model is described in Section II where it is applied to the evaluation of the frequency dependent detectability of underground explosions in various source media. On the basis of these analyses it is concluded that P ... |
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| Investigation of Environment and Response Phenomena for Buried Target Structures in Crater Margins |
01 MAY 1981 |
119 pages |
| Authors:
Y. M. Ito; Russell H. England; Kenneth N. Kreyenhagen; CALIFORNIA RESEARCH AND TECHNOLOGY INC CHATSWORTH
|
| There are situations in which peak overpressure on the surface may be a conservative or even a misleading kill criterion. To kill structures which are hardened to withstand the effects of several thousand psi overpressures may require such small miss distances for a blast-only kill that the structure will be within or very near the crater. Other effects - notably direct ground shock and cratering action will then become substantial, ... |
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| Scale Modeling for the PATRIOT Electromagnetic Pulse Test |
MAY 1981 |
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| Authors:
Andrew A. Cuneo Jr.; James J. Loftus; HARRY DIAMOND LABS ADELPHI MD
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| Experimental electromagnetic coupling studies were made of a scale model of the PATRIOT air defense system as part of the evaluation of this system's ability to survive exposure to an electromagnetic pulse (EMP). This exercise was primarily concerned with providing basic information this is either too costly and time consuming or impossible to obtain in a full-scale field operation. This basic information consists of the answers to such questions as ... |
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| Source-Region Electromagnetic Pulse Simulator. |
10 APR 1981 |
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| Authors:
George Merkel; William D. Scharl; DEPARTMENT OF THE ARMY WASHINGTON DC
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| These and other objects, features and advantages of the invention are accomplished by a method and apparatus for simulating, in conjunction with a source of ionizing radiation, intense pulsed electromagnetic fields and time varying conductivity caused by the gamma radiation associated with a nuclear detonation. An enclosed space, including the source of ionizing radiation is separated into three spaces, each space separated from the adjacent space by a gas impermeable, ... |
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| Evaluations of Five Nuclear Weapons Effects Programs Developed by Horizons Technology, Inc |
MAR 1981 |
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| Authors:
Mark L. Potochi; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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| Five of the programs presented by Horizons Technology, Inc. in 'Nuclear Weapons Effects Programs' are evaluated in this report. These programs are: Overpressure - Near Ideal Surface; Cratering - Radius and Depth II; Overpressure Phenomena; Nuclear Blast Overpressure; and Dynamic Pressure Phenomena. The evaluations are made by comparisons to standard references. A brief description of the phenomena and a listing of the program equations are included. A modified Overpressure Phenomena ... |
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| The DNA Nuclear Blast Standard (1 KT) |
30 JAN 1981 |
167 pages |
| Authors:
Charles E. Needham; Joseph E. Crepeau; SYSTEMS SCIENCE AND SOFTWARE INC ALBUQUERQUE NM
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| A set of subroutines has been developed which provide complete definition of the blast environment resulting from the free air detonation of a one kiloton device in a sea-level atmosphere. The subroutines provide the pressure, density, and velocity as function of space and time (from 1 ms to several minutes). The analytic fits are compared with results of hydrodynamic calculations and with experimental data. Blast parameters are as a function ... |
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| Neutron and Gamma Radiation Measurements and Calculations up to 1.1 Kilometers from a Fission Source. |
26 JAN 1981 |
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| Authors:
A. H. Kazi; C. R. Heimbach; R. C. Harrison; ABERDEEN PROVING GROUND MD MATERIEL TESTING DIRECTORATE
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| The primary objective of this study was to attempt to verify by experimental data whether state-of-the-art radiation transport codes and models, such as DOT III used by Oak Ridge National Laboratory (ORNL) and the Defence Research Establishment Ottawa (DREO) are suitable for predicting radioactive dose and spectra versus distance for fission nuclear weapons. To accomplish this, neutron and gamma spectra, tissue kerma, and dose were measured and calculated at ranges ... |
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| Aurora Flash X-Ray Facility as a Source-Region EMP Simulator |
1981 |
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| Authors:
M. Bushell; R. Manriquez; G. Merkel; W. D. Scharf; HARRY DIAMOND LABS ADELPHI MD
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| The study of source-region electromagnetic pulse phenomenology and coupling is distinguished from more conventional electromagnetic research by the presence of time-varying air conductivity. A good deal of thought and discussion is currently being generated on possible designs for new SREMP simulation techniques. While this is undoubtedly a healthy development, the AURORA facility remains a significant and ever-improving source of data relevant to SREMP environments and coupling. Tactical work using auxiliary ... |
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| DIRECT COURSE Blast Shelter Entranceway and Blast Door Experiments, |
1981 |
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| Authors:
S. A. Kiger; D. W. Hyde; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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| The DIRECT COURSE Event is a high-explosive simulation of a 1-kt height-of-burst nuclear weapon. DIRECT COURSE is sponsored by the Defense Nuclear Agency and is scheduled for September 1983 at the White Sands Missile Range, New Mexico. Three entranceway experiments will be fielded, one full size complete with two blast doors to document structural response and loading in the simulated 1-kt blast environment. Also, two 1/10-scale models, one double and ... |
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| Radiative Properties of a Nuclear Thermal Source Simulator |
31 DEC 1980 |
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| Authors:
W. F. Dudziak; P. V. Lad; INFORMATION SCIENCE INC SANTA BARBARA CA
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| This report summarizes some of the thermal properties of an SAI thermal radiation source (TRS). Its purpose is to illustrate some of the significant time dependent surface fluctuations that do exist in such a radiator which are not present in a nuclear device. These surface fluctuations should be considered in planning experiments, as well as in the interpretation of the collected data. The report also illustrates the courseness of the ... |
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| Broadband Discrimination Studies. |
29 DEC 1980 |
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| Authors:
T. V. McEvilly; L. R. Johnson; CALIFORNIA UNIV BERKELEY SEISMOGRAPHIC STATION
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| Contents: Near field array studies; Regional crustal model from surface waves; Near-source effects on P waves; Archival of digital seismic data. |
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| EXCEDE Energy Deposition. Theory and Experiment Compared |
30 NOV 1980 |
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| Authors:
Douglas H. Archer; MISSION RESEARCH CORP SANTA BARBARA CA
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| This report describes work performed to determine the adequacy of code calculations (based on single particle deposition in ambient air) to describe the energy deposition rate surrounding electron beams at E-region altitudes in the atmosphere. Comparisons are made between model predictions and camera data from the PRECEDE II and EXCEDE:SPECTRAL experiments. Large discrepancies are found to exist between theory and experiment, at least for the EXCEDE:SPECTRAL event, in the region ... |
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| XM-1 Tank EMP Susceptibility and Survivability Test Program and Plan. |
NOV 1980 |
39 pages |
| Authors:
Andrew A. Cuneo Jr; HARRY DIAMOND LABS ADELPHI MD
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| This document describes in detail the test approach, functional tests, support requirements, safety procedures, instrumentation, simulators, and specific test procedures necessary to determine susceptibility and survivability of the XM-1 tank to a simulated nuclear electromagnetic pulse environment. The approach is designed to give high confidence level results with a test sample of one. It incorporates simulator illumination, electromagnetic scale modeling, and cable driving technology. (Author) |
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| Two-Dimensional FCT Model of Low-Altitude Nuclear Effects. |
16 OCT 1980 |
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| Authors:
D. L. Book; NAVAL RESEARCH LAB WASHINGTON DC
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| Low-yield experiments with chemical explosives detonated at low altitude have revealed unusual Mach stem structures. Existing codes employed to simulate these phenomena have been unable to resolve them satisfactorily. During the year beginning 1 June 1979, personnel of the Laboratory for Computational Physics have been working under a contract with the Defense Nuclear Agency to develop software for performing these calculations. For this purpose, we have employed the method of ... |
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| MISERS BLUFF Electromagnetic Propagation Experiments. Final Analysis of the Laser Experiment Data |
01 OCT 1980 |
49 pages |
| Authors:
Arne Rosengreen; Alan A. Burns; SRI INTERNATIONAL MENLO PARK CA
|
| This report describes the lidar data obtained at 1.06 and 0.53 micrometers during the MISERS BLUFF II-2 (MBII-2) tests at the Planet Test Site near Lake Havasu City, Arizona. Experiments were also performed at 10.6 micrometers, but data from these experiments were lost because the recording system malfunctioned. The results from the first four minutes after the detonation are presented. In retrospect, the theoretical analysis, which was developed before the ... |
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| Blast/Fire Interactions: Analysis of Parametric Sensitivity and Large-Scale Experimental Determination of Ignition Thresholds. |
OCT 1980 |
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| Authors:
Stanley B. Martin; Raymond S. Alger; John R. Rempel; Peter S. Hughes; SRI INTERNATIONAL MENLO PARK CA
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| This report describes activities in three areas of technical services in the research field of blast/fire interactions. Two are concerned with parametric sensitivity in predictive modeling, the third with verification of laboratory ignition thresholds using a large field-test source of intense thermal radiation. Airblast effects are shown to be a major source of uncertainty in assessment of fire effects of a nuclear explosion. Blast caused fires may be more important ... |
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| Conductivity Formulas for the Disturbed Ionosphere. |
04 SEP 1980 |
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| Authors:
J. A. Fedder; NAVAL RESEARCH LAB WASHINGTON DC
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| Conductivity formulas are presented for the disturbed ionosphere. These formulas are recommended for use in HANE simulation studies and for other disturbed ionospheric conditions. |
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| SXTF Description: AEDC and NASA Candidate Sites |
29 AUG 1980 |
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| Authors:
Ralph M. Wheeler; JAYCOR DEL MAR CA
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| Modifications to provide SXTF (Satellite X-ray Test Facility) capability at either of two candidate sites, the Mark I space chamber at Arnold Engineering Development Center, Tullahoma, Tennessee, and the 'A' chamber of the NASA Space Environment Simulation Laboratory, Houston, Texas, are described. (Author) |
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| Nuclear Effects Test Program for the DSCS III Communication System. |
21 JUL 1980 |
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| Authors:
A. R. Harcar; GENERAL ELECTRIC CO PHILADELPHIA PA SPACE DIV
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| We have examined the feasibility of testing the DSCS III communication system in a simulated nuclear propagation environment. A set of simulation hardware and software requirements have been derived on the basis of a channel scattering function characterization supplied by the Defense Nuclear Agency and the use of classical statistical communications theory. (Author) |
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| The ROSCOE MANUAL. Volume 27. Natural Background Radiation |
01 JUL 1980 |
346 pages |
| Authors:
Daniel A. Hamlin; Melvin R. Schoonover; SCIENCE APPLICATIONS INC LA JOLLA CA
|
| The Natural Background Radiation Module computes the Earth's natural upwelling spectral radiance (from 2 to 5 micrometers) by averaging over paths in an Earth-tangent cone with vertex at each selected altitude. The processes contributing to the radiance are emission from air, Earth's surface, and clouds and reflection of solar radiation from Earth's surface and clouds; attenuation is by molecules and aerosols. The Module integrates ROSCOE-IR models for atmosphere, atmospheric thermal ... |
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| Regional Detection of Decoupled Explosions, Yield Estimation from Surface Waves, Two-Dimensional Source Effects, Three-Dimensional Earthquake Modeling and Automated Magnitude Measures |
JUL 1980 |
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| Authors:
T. C. Bache; J. R. Murphy; S. M. Day; T. J. Bennett; B. Shkoller; SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
|
| This semiannual technical report includes summaries of five separate technical reports. These are: (1) 'A Simulation Study of the Detectability of a 5.3 KT Decoupled Explosion at Regional Distances in the Eastern United States;' (2) 'Yield Estimation from Surface Wave Recordings of Underground Explosions - A Review;' (3) 'The Contribution of Two-Dimensional Source Effects to the Far- Field Seismic Signatures of Underground Nuclear Explosions;' (4) 'Three- Dimensional Earthquake Modeling Including ... |
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| A Comparison of Casualty Assessment Results from the TENOS and CIVIC codes |
27 JUN 1980 |
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| Authors:
Eugene J. Swick; SCIENCE APPLICATIONS INC LA JOLLA CA
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| Comparison of assessment results from the CIVIC and TENOS Population Casualty Assessment Codes was accomplished under selected input conditions and two U.S. population representations (data bases). Results indicate that for the large yield strike file employed, national results obtained from both codes did not differ significantly because of the significant overlapping of fallout fields. However, state-by-state results showed some significant variations due to the different fallout models employed (CIVIC, TENOS-WSEG-10) ... |
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| Stress Wave Interactions with Tunnels Buried in Well-Characterized Jointed Media |
01 JUN 1980 |
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| Authors:
Martin Rosenblatt; Larry A. DeAngelo; CALIFORNIA RESEARCH AND TECHNOLOGY INC WOODLAND HILLS
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| For the DIABLO HAWK underground nuclear test, several small-scale tunnels were constructed in jointed rock simulant material and stress loaded to approximately 0.8 kbar = 11.6 ksi. These tunnel response tests represented an opportunity to evaluate whether successful pre-shot predictions of tunnel closure and block motion could be made for tunnels buried in a well- characterized jointed media. In this report, numerical simulation predictions using computer code techniques which explicitly ... |
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| Response of Buried Vertically Oriented Cylinders to Dynamic Loading, |
JUN 1980 |
|
| Authors:
Gayle E. Albritton; Jimmy P. Balsara; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| One of the primary concepts proposed for basing advanced ballistic missile systems is to emplace the missile in a buried vertical cylindrical shelter. Since little data were available on the response of vertically oriented cylinders that could be used to assess the hardness of missile silos, a field test program was conducted by the Structures Laboratory of the U.S. Army Engineer Waterways Experiment Station (WES) to determine the response to ... |
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| Asymmetric Collapse of LOS Pipe |
26 MAY 1980 |
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| Authors:
E. T. Moore Jr.; Ron Funston; PHYSICS INTERNATIONAL CO SAN LEANDRO CA
|
| A single laboratory experiment was performed to further evaluate the feasibility of using asymmetries to suppress jetting in line-of-sight (LOS) pipes that are collapsed by the ground shock from an underground nuclear test. Underground conditions were simulated by using a sphere of high explosives to collapse eighteen small-scale models embedded in saturated sand. Two basic types of models were used in the experiment, symmetrical and asymmetrical. The symmetrical models represented ... |
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| Airblast Pressure Transducer for Measurements in Nuclear Blast Simulators. |
APR 1980 |
|
| Authors:
J. V. Quintana; AIR FORCE WEAPONS LAB KIRTLAND AFB NM
|
| An extremely rugged resistance-based blast pressure transducer is developed over a number of years for use in the blast and shock environment of high explosive-driven nuclear blast simulators. A novel silicon disk with integral (diffused) strain sensitive regions is used as the transduction element for measurements of peaks to 69 MPa and requiring microsecond rise time response. Evolution of the transducer geometry, internal configuration, and special thermal barriers enable sensing ... |
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| Post-Shot Blast Loading Predictions for German Structure Number 2. Dice Throw Event. |
MAR 1980 |
|
| Authors:
George A. Coulter; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Pressure-time blast loading post-shot predictions are presented for German Structure No. 2 exposed on the Dice Throw Event. Loading curves are shown for front, side and interior structure locations. |
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| Structural Modeling and Response of Command, Control and Communication Shelter Systems for Event DICE THROW. |
MAR 1980 |
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| Authors:
John M. Calligeros; John P. Walsh; Raffi P. Yeghiayan; KAMAN AVIDYNE BURLINGTON MA
|
| Structural finite element models of the Army command, control, and communication systems AN/TRC-117, AN/TRC-110, AN/TCC-61 which utilizes the S-280 shelter, and the AN/TRC-145 and AN/GRC-142B, which utilize the S-250 shelter, were developed for NASTRAN. Loading models and dynamic response for overpressure levels experienced in the recent DICE THROW field test were determined for all but the AN/GRC-142B. Comparisons between measured and analytical accelerations are given for the AN/TRC-117 and the ... |
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| PIVUL - A Computer Code for Rapid Assessment of the Vulnerability of Simple Structures to Blast. |
MAR 1980 |
|
| Authors:
Norman P. Hobbs; Kenneth R. Wetmore; KAMAN AVIDYNE BURLINGTON MA
|
| This report presents the methodology which led to the development of a vulnerability code, PIVUL, for utilization in rapid damage assessment of simple structural elements subjected to nuclear blast environment. The basic concept of blast damage assessment employed in the report is the pressure-impulse approach. Light, moderate, and heavy damage are considered. |
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| Development of Airblast and Soil Strength Instrumentation. |
01 FEB 1980 |
|
| Authors:
P. L. Coleman; M. A. Groethe; SYSTEMS SCIENCE AND SOFTWARE LA JOLLA CA
|
| The development and testing of airblast and soil strength gauges are presented. The airblast sensors include an accelerometer instrumented drag sphere to measure dynamic pressure and bar gauge probes to measure static, stagnation and reflected pressures at levels to 10 to the 8th power Pa (1 kilobar). The soil strength gauge is a shock hardened dynamic cone penetrator. An analysis of a slug type heat flux sensor is given. (Author) ... |
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| The Physics of the Photodeposition Phase of the NRL Master Code for the Disturbed E and F Regions. |
24 JAN 1980 |
|
| Authors:
A. W. Ali; NAVAL RESEARCH LAB WASHINGTON DC
|
| The physics of the revised photoionization phase for the NRL Master Code for the Disturbed E and F Region of the ionosphere is presented. The revision utilizes current total and partial photoionization cross sections. (Author) |
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| Post-Test Blast Response Analyses of DICE THROW Vehicles |
JAN 1980 |
123 pages |
| Authors:
Kenneth R. Wetmore; ARMY MEDICAL RESEARCH AND DEVELOPMENT COMMAND FORT DETRICK MD
|
| This report summarizes the results of a blast response study of select truck configurations fielded in the DICE THROW test. Using the TRUCK computer code, the response time-histories of four different Army wheeled vehicle systems exposed to both blast overpressure and dynamic pressure loadings were obtained. Important motions of the total systems subsequent to blast wave interception, particularly vehicle overturning, are plotted. |
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| EMP Coupling to Ships, |
JAN 1980 |
|
| Authors:
F. J. Deadrick; H. S. Cabayan; Karl F. Kunz; R. M. Bevensee; L. C. Martin; CALIFORNIA UNIV LIVERMORE LAWRENCE LIVERMORE LAB
|
| Scale-model tests were conducted to establish the adequacy and limitations of model measurements as tools for predicting electromagnetic pulse (EMP) coupling voltages and currents to the critical antennas, cables, and metallic structures on ships. The scale-model predictions are compared with the results of the full-scale EMP simulation test of the Canadian ASW ship, HMCS Huron. (The EMP coupling predictions in this report were made without prior knowledge of the results ... |
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| Blast Tests of Expedient Shelters in the MISERS BLUFF Event. |
JAN 1980 |
|
| Authors:
Cresson H. Kearny; Conrad V. Chester; Edwin N. York; OAK RIDGE NATIONAL LAB TN
|
| Expedient shelters were blast-tested by a conventional explosion equivalent to a 0.2 KT nuclear explosion. The estimated survivabilities in a large nuclear explosion are: (1) improved Small-Pole Shelter, 345 kPa (50 psi); (2) triangular entryway and blastdoor made of poles, 173 kPa (25 psi); (3) Chinese A-Frame Pole Shelter, 48 kPa (7 psi); and (4) lightly shored Pole-Covered Trench Shelters, 103 kpa (15 psi). (Author) |
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| Calculation of Multiple Burst Interactions for Six Simultaneous Explosions of 120 Ton ANFO Charges |
15 DEC 1979 |
59 pages |
| Authors:
J. R. Ruetenik; Norman P. Hobbs; Robert F. Smiley; KAMAN AVIDYNE BURLINGTON MA
|
| The REFLECT code was modified for calculation of the interaction of six equal blast waves from simultaneously detonated charges in a hexagonal pattern. The objective has been to determine whether the REFLECT code, if further modified, would have the potential for accurate calculation of the interaction of six blast waves. In its present form the code is called REFLECT-3. A calculation was performed for the conditions of the MISERS BLUFF ... |
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| MISERS BLUFF II Cloud Sampling Program, Data Summary and Dust Cloud Characterizations. |
07 DEC 1979 |
|
| Authors:
Charles R. Thomas; John E. Cockayne; SCIENCE APPLICATIONS INC MCLEAN VA
|
| This report describes in detail the analysis of the MISERS BLUFF II dust cloud data base (in-situ particle size spectral data and fallout data) obtained during Phase 1 of the MISERS BLUFF II Cloud Sampling Program. The analysis indicates a mass loading ratio of about 7 at cloud stabilization (T+10 minutes) between the multiple and single burst dust clouds. Although, within the range of measurement uncertainties, this value may be ... |
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| Optical Measurements of LASL Operation Avefria Barium Shaped Charge Release Phenomenology. |
01 NOV 1979 |
|
| Authors:
W. P. Boquist; TECHNOLOGY INTERNATIONAL CORP BEDFORD MASS
|
| Photographic measurements of the two shaped charge barium releases in the upper atmosphere were made by Technology International Corporation in May 1978 near Tonapah, Nevada. Extensive black and white and color film records were obtained of the detonation geometry and barium ion cloud structure. This report contains a technical pictorial history of each event, measurements of the detonation motion velocities, and a radiometric time history for the second event. (Author) ... |
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| Summary Report. HYBLA GOLD Event. |
01 NOV 1979 |
|
| Authors:
Jerry R. Stockton; ACUREX CORP/AEROTHERM MOUNTAIN VIEW CA AEROSPACE SYSTEMS DIV
|
| The HYBLA GOLD experiment was designed to increase our understanding of the phenomenology of the MX in-trench environment and to improve our confidence in making predictions of this environment. The HYBLA GOLD experiment satisfied most of the original objectives. Useful data was obtained for the purpose of developing and validating instrumentation which might be required in future underground nuclear tests. In general, the instrumentation fielded to measure shock time-of-arrival, plasma ... |
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| Magnetically Driven Flyer Plate Simulation of a Radiation Environment on a Composite Material |
31 OCT 1979 |
142 pages |
| Authors:
William S. Doane; David H. Seitz; KAMAN SCIENCES CORP COLORADO SPRINGS CO
|
| The goals of the program were to: (1) Correlate the KSC magnetically driven flyer plate facility test techniques with those of another facility; (2) define AGT test techniques which successfully duplicate UGT test results; (3) expand the 3DQP material data base; and (4) establish 3D quality control procedures (3DQC) through analytics, NDM, NDT, resonance test techniques, and flyer plate loading procedures. KSC participation in the program touched on all four ... |
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| Some Ramifications of the Power-Law Spectral Index for Propagation Modeling. |
01 OCT 1979 |
|
| Authors:
Charles L. Rino; SRI INTERNATIONAL MENLO PARK CA
|
| Accurate modeling of radio-wave propagation phenomena is important for verifying our understanding of the physics of ionospheric instabilities that structure the ambient electron density as well as predicting deleterious systems effects. New results in radio-wave propagation theory have quantified the relationship between the power-law index that characterizes the average striation size distribution and the signal structure under strong scatter conditions. This report discusses some ramifications for propagation modeling of these ... |
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| Broadband Discrimination Studies |
01 OCT 1979 |
|
| Authors:
T. V. McEvilly; L. R. Johnson; CALIFORNIA UNIV BERKELEY SEISMOGRAPHIC STATION
|
| Current studies of the manner in which elastic waves are generated by buried explosions, such as the moment tensor approach, require high-quality broadband ground motion data. In order to obtain such data at distances of a few kilometers from the source, a method or recording the ground motion with force- balance accelerometers and triggered event recorders has been developed and tested. The two NTS events EMMENTHAL and FARM were recorded ... |
|
| Fallout Hazard Prediction Inconsistencies. |
01 OCT 1979 |
109 pages |
| Authors:
Howard A. Hawthorne; GENERAL ELECTRIC CO SANTA BARBARA CA DASIAC
|
| An elementary review of modelling of fallout processes is presented, with lists of some of the important variables that modules within models are called on to parameterize. A brief historical synopsis of the development of modelling includes a description of efforts with a standardized input data to produce output directly comparable among models, including illustrations of the output over the nuclear yield range of less than 1 KT to 15 ... |
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| Modeling of Room Response to Air Blasts. |
22 AUG 1979 |
|
| Authors:
Dennis Keefer; TENNESSEE UNIV SPACE INST TULLAHOMA
|
| A relatively simple model has been developed for the prediction of pressure response within a one room structure subjected to air blast. The model is based on an acoustic analysis and a room fill model. These models have been combined, together with a model for the entering diffracted shock, to produce a model which can predict the pressure-time response at any spatial location within the room. Good agreement is obtained ... |
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| ATS-6 Measurements during AVEFRIA. |
01 AUG 1979 |
|
| Authors:
Alan A. Burns; SRI INTERNATIONAL MENLO PARK CA
|
| An experimental program was conducted to measure dispersive-phase and amplitude perturbations caused by the AVEFRIA shaped-charge barium release series. 360- and 1550-MHz signals from the ATS-6 geostationary satellite were used for those measurements. A novel technique, whereby the ATS-6 communications subsystem was phase locked to ATS-6 rf beacon, provided a 3950-MHz reference signal for the dispersive phase measurements. Four occultations were achieved during the two AVEFRIA events. Durations of strong ... |
|
| DICE THROW/UHF/SHF Transmission Experiment. Volume III. Final Data Reduction and Interpretation. |
01 AUG 1979 |
142 pages |
| Authors:
Alan A. Burns; Patricia L. Crawley; SRI INTERNATIONAL MENLO PARK CA
|
| This report presents the final results from an rf propagation experiment fielded during the DICE THROW HE test held at the White Sands Missile Range on 6 October 1976. That experiment was designed to measure the effects of high-density, explosively produced dust clouds on a series of coherent signals ranging in frequency from 400 MHz to 10 GHz. Both amplitude and phase data were obtained. This report contains: (1) A ... |
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| Effects of Terrain on Blast Waves. |
AUG 1979 |
|
| Authors:
John H. Keefer ; George T. Watson ; George A. Coulter ; Vincent L. King; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The results from a small charge model experiment based on real terrain are presented for various ground zero points. The model simulates a 125 kt weapon burst of a height of 300 m over the prototype terrain. A comparison is shown between the experimental blast waves and those predicted by currently used prediction methods. (Author) |
|
| Post-Test Analysis of Brunswick MOD Shelter Tested in DICE THROW. |
JUL 1979 |
|
| Authors:
John M. Calligeros; MITRE CORP BEDFORD MA
|
| A post-test examination and structural failure analysis of the Brunswick MOD shelter exposed to a 6.5 psi incident overpressure in the 1976 DICE THROW high explosive (HE) field test is presented. The shelter is of modular construction incorporating WR II-3/8-3.8 kraft paper honeycomb for the wall-panel core material. Shock-mounted equipment racks were located near the roadside and curbside walls. The design of the shelter was intended to withstand the blast ... |
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Reports by Keyword(s)
NUCLEAR EXPLOSION SIMULATION
