| Proposed FY13 LRIR: Shock-Mitigating Multilayered Mechanical Metamaterials (SM5) |
02 Aug 2012 |
30 pages |
| Authors:
Jason R Foley; AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIR/ORDNANCE DIVISION
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| Damping and Vibration Mitigation: Critical Issues |
Aug 2012 |
29 pages |
| Authors:
Daniel J Inman; MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING
|
 | Summary: Three Main Issues: Damping materials are temperature and frequency dependent. 2. Damping falls off in extreme environments. 3. There is a miss match damping as seen/measured by material engineers and structural engineers. Can multifunctional approaches solve these problems? |
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| Optimization of One-Dimensional Aluminum Foam Armor Model for Pressure Loading (Briefing charts) |
12 APR 2011 |
17 pages |
| Authors:
John C. Goetz; Andres Tovar; John Renaud; NOTRE DAME UNIV IN
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| An Assessment of Architecturally Appealing, Semi-Open Shock Mitigation Devices |
Oct 2010 |
10 pages |
| Authors:
Rainald Loehner; Joseph D Baum; GEORGE MASON UNIV FAIRFAX VA SCHOOL OF COMPUTATIONAL SCIENCES
|
| The blast mitigation potential of architecturally appealing alternatives to blastwalls is investigated numerically. Seven different designs are compared. It is found that for some of these, the maximum pressure is comparable to usual, closed wallwalls, and the maximum impulse approximately 50% higher. This would indicate that such designs could offer an alternative blast mitigation device that city planners may find acceptable. |
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| Lines of Energy Deposition for Supersonic/Hypersonic Temperature/ Drag-Reduction and Vehicle Control |
06-Oct-2009 |
15 pages |
| Authors:
Kevin Kremeyer; Michael P Reilly; George H Miley; AIR FORCE RESEARCH LAB EDWARDS AFB CA PROPULSION DIRECTORATE
|
| Lines of energy are deposited ahead of supersonic and hypersonic vehicles in order to create a low-density channel, through which a vehicle can travel with dramatically reduced drag. Temperature and pressure are both also reduced on the front surfaces of the vehicle, while density and pressure are increased at the vehicle base. When applied off-center, this technique can be used to control the vehicle, employing the entire body as the ... |
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| Porous Hull Research - Phase 1 |
Feb-2009 |
37 pages |
| Authors:
Timothy Coats; Scott Gowing; Young Shen; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
| High speed planing craft suffer repetitive and intense shock loads from wave impacts that injure or fatigue personnel and damage equipment. A porous hull concept is tested for reducing the impact loads and spreading their energy over a longer time. The concept is essentially an outer hull with holes and an inner hull for watertight integrity, and bladders and foams are used between the hulls to expel water between impacts. ... |
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| Lightweight Multifunctional Linear Cellular Alloy Ballistic Structures |
26 APR 2006 |
16 pages |
| Authors:
Joe K. Cochran; STRUCTURED ALLOYS INC MARIETTA GA
|
| The objective of this effort was to develop the techniques for fabricating a multifunctional lightweight structure that could be used as armor for mobile vehicles such as personnel carriers. These fabrication techniques are scalable to manufacturing production levels. For this program, square cell LCA honeycomb with both maraging steel and super invar compositions were fabricated using SAI's patented technology to have cross sections of one inch square. These honeycombs have ... |
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| Predicting the Distribution and Properties of Buried Submarine Topography on Continental Shelves |
05 FEB 2006 |
18 pages |
| Authors:
Neal Driscoll; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA
|
| Compile geological data and develop methods to predict the distribution and properties of features hypothesized to be responsible for sonar geoclutter. Contribute to the reduction or mitigation of geologic clutter observed on fleet sonar systems. Two issues define the problem. In area x, can the Navy expect geoclutter features and if so what are their sonar characteristics, i.e. channel orientation? If geoclutter features are expected in area x, will the ... |
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| NIF Ignition |
JUL 2005 |
60 pages |
| Authors:
David Hammer; Lars Bildsten; Henry Abarbanel; John Cornwall; Douglas Eardley; Will Happer; Stanley Flatte; Russ Hemley; Raymond Jeanloz; MITRE CORP MCLEAN VA JASON PROGRAM OFFICE
|
| JASON was asked by the National Nuclear Security Administration (NNSA) to assess the plan and prospects for achieving inertial confinement fusion (ICF) ignition at the National Ignition Facility (NIF) by 2010, including the use of beryllium targets. |
|
| Quarterly Progress Report - Homopolar Motors Contract N00014-05-1-0123 for Period of Performance, March 1, 2005 - May 31, 2005 |
JUN 2005 |
16 pages |
| Authors:
Ian R. Mcnab; TEXAS UNIV AT AUSTIN INST FOR ADVANCED TECHNOLOGY
|
| This quarterly report provides a summary of support provided by the Institute for Advanced Technology (lAT) at The University of Texas at Austin (UT) to the Office of Naval Research (ONR) on the development of high-power superconducting homopolar motors for ship propulsion. One of the major issues facing the development of such machines for ship propulsion is the lifetime of the brushes used to transfer power from the homopolar motor ... |
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| Integrated Adaptive Compression |
31 JAN 2005 |
37 pages |
| Authors:
J. S. Goldstein; Hanna Witzgall; Robert R. Greene; Michael D. Zoltowski; SCIENCE APPLICATIONS INTERNATIONAL CORPSAN DIEGO CA
|
| The objective of the Integrated Sensing and Processing (lSP) program was a holistic approach to the design of systems. I) SAIC designed a Joint Source-Channel Coding algorithm, designed to integrate the source data with channel coding. The work resulted it an algorithm that both incorporated a feedback of sensor information into the processing chain and broke through the traditional processing flow of optimizing the compression algorithms based on separate black ... |
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| Development Of Very-High-Strength and High-Performance Concrete Materials for Improvement of Barriers Against Blast and Projectile Penetration |
DEC 2004 |
18 pages |
| Authors:
E. F. O'Neill III; T. K. Cummins; B. P. Durst; P. G. Kinnebrew; R. N. Boone; R. X. Torres; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The U.S. Department of Defense is constantly pursuing new technologies to improve the capabilities of protective structures in defeating current and emerging threats thus providing a safer environment in which its soldiers must work and fight. Exploiting innovative uses of cement-based materials, the U. S. Army Engineer Research and Development Center (ERDC) is developing several high-performance concretes to mitigate the effects of blast and ballistic threats from conventional and asymmetric ... |
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| Volume and Surface Plasmas |
SEP 2004 |
60 pages |
| Authors:
Biswa N. Ganguly; AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
|
| Scaling of volume and surface dominated plasmas were quantified by electrical, microwave and optical measurements. The application of these plasma devices range from RF plasma processing, high flux atom production, plasma switch and plasma assisted combustion. |
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| Instability and Failure in Ductile Solids with Regular Microstructures |
01 SEP 2003 |
9 pages |
| Authors:
N. Triantafyllidis; MICHIGAN UNIV ANN ARBOR DEPT OF AEROSPACE ENGINEERING
|
| The work accomplished in this project consists of the following contributions: (a) onset-of-failure surface calculations for finitely strained continua with periodic microstructures - which have either voids or rigid inclusions - and which are subjected to arbitrary loading in plane strain (2D), (b) failure surfaces for composites under combined axial and shear loading and comparison of the calculations with experimental results carried out at the University of Texas at Austin, ... |
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| Analysis and Mitigation of Mechanical Shock Effects on High Speed Planing Boats |
SEP 2001 |
|
| Authors:
Sean D. Keams; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MECHANICAL ENGINEERING
|
 | United States Special Forces use high-speed planing boats in the performance of their missions. Operation of these boats, particularly in rough seas, exposes the occupants to severe mechanical shock exposure that has been linked to significant increase in the rates of acute and chronic injury. While many government and civilian organizations have researched various aspects of this problem over the past decade or more, no effective solution has yet been ... |
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| Tarague Interpretive Trail Mitigation Plan |
FEB 2001 |
13 pages |
| Authors:
David Welch; INTERNATIONAL ARCHAEOLOGICAL RESEARCH HONOLULU HI
|
| At the request of the Chief, Cultural and Historic Resources, 36 CES/ CEYN, Unit 14007 at Andersen Air Force Base (AAFB), International Archaeological Research Institute, Inc. (lARfI) has prepared a mitigation plan for development of an interpretive trail at Tarague Beach, located on the north coast of the island of Guam (Fig. 1). The interpretive trail that is the subject of this document is located in the center of the ... |
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| Whole-Spacecraft Vibration Isolation for Broadband Attenuation |
MAR 2000 |
9 pages |
| Authors:
Paul Wilke; Conor Johnson; Patrick Grosserode; Dino Sciulli; CSA ENGINEERING INC MOUNTAIN VIEW CA
|
| Launch vehicles impart high levels of vibration to spacecraft during launch. The vibration environments are defined over several frequency bands: (1) transient vibration < 80 Hz, (2) random vibration 20 to 2000 Hz, and (3) pyrotechnic shock 100 to 10000 Hz. Loads from transient vibration define spacecraft design of primary structures such as spacecraft bus, solar panel and antenna supports, instrument mounts, etc. Loads from random vibration define the design ... |
|
| Numerical Modeling of Small Scale Water Mitigation Feasibility Tests |
Aug-1998 |
26 pages |
| Authors:
Naury K Birnbaum; Gregor E Fairlie; Nigel J Francis; CENTURY DYNAMICS INC SAN RAMON CA
|
| Water placed in the vicinity of explosives in a confined environment has been found to significantly mitigate the quasi-static gas pressure from an explosion. Reports on several small scale tests available from the open literature confirm that gas pressures can be reduced by up to 90%. This is of significant importance for the safety of explosive facilities wherein the gas pressure from an explosion controls debris distance. Analytical and numerical ... |
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| Development of Analytical Methods Applicable to Test Data |
10 MAR 98 |
81 pages |
| Authors:
Pierre E. Dupont; BOSTON UNIV MA DEPT OF AEROSPACE AND MECHANICAL ENGINEERING
|
| In a variety of situations, an undesired shock excitation is applied to a master structure that supports shock sensitive equipment. Often, one wishes to design and test a master structure that transmits the least amount of shock energy to the attached equipment. In scaled testing of new designs, a major task is to design and construct 'equipment emulators' - inexpensive mechanical systems which approximately mimic the dynamic behavior of the ... |
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| Feasibility of a Blast Wave Attenuation Structure |
1998 |
|
| Authors:
Dale Richard Hartmann; UNIV OF WASHINGTON SEATTLE DEPT OF MECHANICAL ENGINEERING
|
| This thesis begins with an overview of bombings in the United States, followed by the introduction of the Rankine Hugoniot equations for blast wave pressure. The subsequent chapters develop the one dimensional and two dimensional Euler equations. These equations are the solved using the MacCormack finite difference algorithm. The basis of the investigation then begins by placing pole, shear plate and wedge obstacles in the path of the blast wave. ... |
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| System for Shock Hardening a Torpedo Nose Fairing Bearing Plate Assembly |
25 NOV 1997 |
|
| Authors:
Christa M. Reise; James C. Butts; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A system for shock hardening the nose fairing bearing plate assembly of a torpedo by controlling the deformation of the bearing plate under shock loads. A stop bolt within a torpedo tube engages the bearing plate to prevent relative movement between the torpedo tube and the torpedo and to transfer loads between the torpedo housing and the torpedo tube. The system includes providing a tang on the bearing plate to ... |
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| Shock Reduction by Means of Resiliently Mounted Floors; Influence of Damping and Coinciding Eigen Frequencies (Schokreductie d.m.v. Zwevende Vloeren; Invloed Demping en Samenvallende Eigenfrequenties) |
16 DEC 96 |
65 pages |
| Authors:
J. VAN DEN Eikhoff; R. Regoord; CENTRE FOR MECHANICAL ENGINEERING TNO DELFT (NETHERLANDS)
|
| The analysis concerns a simple 2D finite element model of a large resiliently mounted steel floor on a deck of a frigate subjected to the effects of UNDEX shock. For the prescribed motion at the deck edges, a kickoff pulse has been taken. The latter being obtained with the SWISS Code for an actual charge geometry. Cable wound shock mounts were installed. Shock response results were compared with those as ... |
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| Reduction of Shock by Means of Resilient Floors; Vibration Modes (Schokreductie Door Middel Van Zwevende Vloeren; Trilvormen) |
07 NOV 96 |
60 pages |
| Authors:
J. M. Costvogels; HOOFDGROEP MAATSCHAPPELIJKE TECHNOLOGIE TNO DELFT (NETHERLANDS)
|
| This report comprises the calculations called Sum S through 13 of a sequence of Sums' reported elsewhere. Various vibration modes are calculated and presented graphically. The modes concern the combination of a resilient floor upon a deck and some hull plating of the LCF. Vibration modes, Eigenfrequencies, Shock, Resilient floor. |
|
| National Wetland Mitigation Banking Study. Commercial Wetland Mitigation Credit Markets: Theory and Practice |
NOV 1995 |
103 pages |
| Authors:
Paul Scodari; Leonard Shabman; David White; ARMY ENGINEER INST FOR WATER RESOURCES FORT BELVOIR VA
|
| The primary Federal regulatory program governing wetlands is authorized by Section 404 of the Clean Water Act. Similarly structured state and local permit programs also exist. In most instances, wetlands permitting is, by formal regulation, expected to follow a mitigation 'sequence' where the applicant for a permit must first show that the proposed activity has been designed to avoid wetlands to the maximum extent. If avoidance is not possible, then ... |
|
| A Guidebook for Application of Hydrogeomorphic Assessments to Riverine Wetlands |
NOV 95 |
220 pages |
| Authors:
Mark M. Brinson; F. R. Hauer; Lyndon C. Lee; Wade L. Nutter; Richard D. Rheinhardt; EAST CAROLINA UNIV GREENVILLE NC
|
| The report outlines an approach for assessing wetland functions in the 404 Regulatory Program as well as other regulatory, planning, and management situations. The approach includes a development and application phase. In the development phase, wetlands are classified into regional subclasses based on hydrogeomorphic factors. A functional profile is developed to describe the characteristics of the regional subclass, identify the functions that are most likely to be performed, and discuss ... |
|
| Repeated Water Entry Shocks on High-Speed Planing Boats |
SEP 95 |
60 pages |
| Authors:
Richard M. Gollwitzer; Ronald S. Peterson; COASTAL SYSTEMS STATION PANAMA CITY FL
|
| The occupants of high-speed planing boats (HSPBs) are exposed to repeated shock impacts that result from hull slamming during operations in rough water. The development and application of injury/performance prediction methods and standards to HSPB operation are discussed. Tests conducted at sea to quantify repeated shocks are described and results are presented. The applicability of scale model tests and the development of computer simulations are discussed. Relationships between test data ... |
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| Method and Means for Isolating Equipment From Shock Loads. |
28 MAR 1995 |
|
| Authors:
Allan Rydberg; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| The current invention is a method and apparatus for shock mounting an object in a container. A container is provided having side walls to accommodate movement of the object. The container is filled with a fluid having substantially the same density as the object to be shock mounted. The object is mounted in the container by a plurality of shock mounts. In accordance with the apparatus, a container is provided ... |
|
| Materials for Shock Mitigation |
JUL 94 |
86 pages |
| Authors:
L. C. Muszyski; M. A. Rochefort; APPLIED RESEARCH ASSOCIATES INC PANAMA CITY FL
|
| The objective of this effort was to investigate basic material properties that affect shock wave attenuation in construction materials and field test materials which show promise as external shock mitigators (ESMs). The results of this work demonstrated that very efficient ESM material systems can be produced from plastic containers embedded in low-density foam matrices. Full scale field testing was performed on such a material system using a conventional weapon. (MM) ... |
|
| TECHDATA: A Compendium |
APR 94 |
42 pages |
| Authors:
Larry Testerman; ARMSTRONG LAB TYNDALL AFB FL ENVIRONICS DIRECTORATE
|
| This technical report provides the reader with a compendium of TECHDATA published by the Air Force Engineering and Service's Laboratory, Air Force Civil Engineering Laboratory, and Armstrong Laboratory Environics Directorate from November 1990 to the Present. It provides technical descriptions of technologies or processes developed by this organization as it went through several major reorganizations or force realignment. It refers the reader to documents and contacts who can provide more ... |
|
| Fallout Radiation Piece Part Database |
23 FEB 90 |
|
| Authors:
Andre Rausch; AT AND T FEDERAL SYSTEMS WASHINGTON DC
|
| The Electromagnetic Pulse (EMP) Mitigation Program evaluates, where possible, mitigate the effects of the nuclear attack. Fallout radiation has been identified as a by product of a nuclear attack which may affect the performance of the regional and national telecommunications system. In an effort to further examine the effects of fallout radiation, this report presents the results of increasing the sample size of the piece part families by increasing the ... |
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| A Program to Develop and Codify Urban Nuclear Weapon Effects |
24 JUN 1983 |
|
| Authors:
J. A. Northrop; B. E. Freeman; R. E. Duff; S-CUBED LA JOLLA CA
|
| A program is developed which, if implemented, would assess those effects of a detonation of a terrorist nuclear weapon located in a highly built- up urban area which are unique to the environment, and consider possible techniques for damage limitation. It is assumed that the weapon is of low-yield, that its hiding place can be located, and that there is sufficient time before its detonation for the application of mitigation ... |
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| Helicopter Vibration Suppression Using Simple Pendulum Absorbers on the Rotor Blade |
SEP 1982 |
|
| Authors:
G. Alvin Pierce; M-Nabil H. Hamouda; GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
|
| The objectives of the present investigation are: (1) Develop a mathematical model to represent the blade-pendulum system. A single nonuniform rotor blade with a hingeless hub restraint undergoing coupled flapwise bending, chordwise bending, and torsional vibrations is considered. Simple pendulum absorbers are individually treated for both flap and lead-lag types of motion. The blade is excited by an azimuthal harmonic variation of spanwise airload distributions associated with the elastic deformations ... |
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| Polyurethane Foams for Aircraft Shock Mounts. IV. Other Polyols |
JUN 1982 |
|
| Authors:
James V. Duffy; NAVAL SURFACE WEAPONS CENTER SILVER SPRING MD
|
| A number of polyether polyurethane flexible foams are being developed as shock mitagators for electronic equipment aboard Navy aircraft. These foams are based on polyol mixtures derived from poly(oxytetramethylene) glycol and poly(oxypropylene)polyol. This report describes the effect that changes in the basic polyol composition has on the foam's vibration damping and mechanical properties. |
|
| A Study of Wall Jets and Tangentially Blown Wings |
JUL 1981 |
177 pages |
| Authors:
N. D. Malmuth; W. D. Murphy; J. D. Cole; ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER
|
| A study of transonic wall jets and tangentially blown wings has been performed by using asymptotic and computational methods. For the portion of the effort dealing with wall jets, both submerged and coflowing cases have been investigated. For the submerged configurations, the nature of the decay process for disturbances emanating from the jet exit has been examined. In this analysis, the Kutta condition on the nozzle rim can be satisfied ... |
|
| Mitigation of Explosion Bubble Pulsation Caused by the Deep Underwater Detonation of a Tapered Charge |
31 OCT 1980 |
114 pages |
| Authors:
J. M. Thomsen; S. F. Ruhl; PHYSICS INTERNATIONAL CO SAN LEANDRO CA
|
| The dynamics of the explosion bubble growth and collapse due to the underwater detonation of a 5.3-m-long tapered charge containing 454 kg of TNT are examined calculationally. The burst was 305 m below the sea surface in deep water. The calculational method, using a coupled Eulerian-Lagrangian finite- difference hydrodynamics computer code, was made credible by successfully calculating the explosion bubble dynamics of spherical TNT charges detonated at the same depth ... |
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| Computational Modeling of Simulation Tests. |
JUN 1980 |
|
| Authors:
G. Leigh; W. Chown; B. Harrison; NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY
|
| This effort modeled two types of nuclear airblast simulators, the High Explosive Simulation Technique (HEST) and the Dynamic Airblast Simulator (DABS), with hydrodynamic Computer Codes. One dimensional similarity solutions, Modified 1-D, and 2-D calculations are described. High explosive burn routines and energy deposition schemes are described. For the HEST, explosive distribution and cavity configurations were studied. For the DABS, energy deposition, calculational cell size, and a preliminary look at shock-target ... |
|
| Universal Shock and Vibration Mounts. |
03 JAN 1978 |
|
| Authors:
James M. Nycum; DEPARTMENT OF THE NAVY WASHINGTON D C
|
| This patent describes a universal mounting base for protecting fragile equipment against shock and vibration. A resilient plastic foam pad of rectangular outline is divided into quadrature air cavities and sandwiched between bottom and top plates. The top plate includes four matrices of holes, each matrix registering with a respective cavity, and being selectively blocked by cover pads interfaced between the top plate and the bottom of the equipment to ... |
|
| Naval Emergency Air Cargo Delivery System (NEACDS) Feasibility Tests and Evaluation. |
DEC 1977 |
91 pages |
| Authors:
Russell H. Putnam; Maurice J. Zubkoff; Fred A. Myers; Thomas E. Wheatley; DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD
|
| The Naval Emergency Air Cargo Delivery System (NEACDS) is designed to provide an emergency delivery capability to resupply priority items to ships at sea from fixed wing aircraft via airdrop. The major objective of the project has been to establish the feasibility of this concept with the added provisions of (1) not putting a man or boat in the water during retrieval up through sea state 4, and (2) using ... |
|
| Comparison of the Ride Qualities of Standard M60A1 and Hybrid (Tube-Over-Bar) M60A1E3 Tanks. |
JUN 1975 |
|
| Authors:
Newell R. Murphy Jr.; James H. Robinson; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
|
| The main objectives of the study were to determine the advantages in ride quality provided by the hybrid suspension configuration and to obtain better-quality terrain-limiting speeds for input to the DYNTACS computer model for combat effectiveness studies. Also investigated was the effect of the main gun position on ride quality and compare ride levels at the driver's seat with those at the tank commander's observation seat. |
|
| Modeling the Impact Response of Bulk Cushioning Materials. |
09 MAY 1975 |
175 pages |
| Authors:
Don McDaniel; ARMY MISSILE RESEARCH DEVELOPMENT AND ENGINEERING LAB REDSTONE ARSENAL ALA AEROBALLISTICS DIRECTORATE
|
| The report deals with the use of bulk cushioning materials in shock mitigation systems. The current techniques used in designing bulk cushioning systems are discussed, and an improved technique is presented through the development of a mathematical model of impact response which is based on the viscoelastic properties of bulk cushioning materials. A General Model of impact response which is applicable to all types of bulk cushioning materials and predicts ... |
|
| The Shock and Vibration Bulletin. Part 4. Prediction and Experimental Techniques, Isolation and Damping |
JUN 1973 |
207 pages |
| Authors:
NAVAL RESEARCH LAB WASHINGTON DC SHOCK AND VIBRATION INFORMATION CENTER
|
| Partial Contents: A Simplified Nonlinear Method for Estimating the Fatigue Life of Acoustically Excited Panels, Studies on the Dynamic Impact of Jet Engine Blades; Natural Frequencies and Damping of Full-Scale Hydrofoils by 'Pluck Test' Methods, Ground Tests of an Active Vibration Isolation System for a Full-Scale Helicopter, Shock Mitigation System Subjected to Thirteen Feet of Ground Motion - Cannikin Event, Viscoelastic Epoxy Shear Damping Characteristics, and Influence of an Absorber ... |
|
| Biological Tolerance to Air Blast and Related Biomedical Criteria |
18 OCT 1965 |
256 pages |
| Authors:
Clayton S. White; I. G. Bowen; Donald R. Richmond; CIVIL EFFECTS TEST OPERATIONS (AEC) WASHINGTON DC
|
| Experience with animals exposed in a variety of above and below ground structures during full-scale field operations at the Nevada Test Site in 1953, 1955 and 1957 were reviewed. The data were assembled and summarized to illustrate the nature of the blast-induced problems of significance in protective shelters, "open" as well as "closed". Potential hazards were related to the following: various patterns of variation in ... |
|
| Choosing Materials for Package Cushioning Applications |
APR 63 |
11 pages |
| Authors:
S. A. Eller; A. A. Stein; NEW YORK NAVAL SHIPYARD BROOKLYN
|
| Here is foamed resilient elastomeric, plastic and rubberized hair materials for package cushioning was tested. First, they determined all conditions package would encounter. From this information laboratory tests were devised. From data on stress, strain, hysteresis, shock mitigation, creep, density, package cushioning requirements were calculated. |
|
| Eagle Stowage and Shock Mitigation Study. |
30 NOV 1960 |
|
| Authors:
F. E. Smallman; D. W. Seaton; S. S. Brady; VITRO LABS SILVER SPRING MD
|
|
| Investigation of Shock Diffusers at Mach Number 1.85. 2 - Projecting Double-Shock Cones |
17 JUN 1947 |
45 pages |
| Authors:
W. E. Moeckel; J. F. Connors; A. H. Schroeder; FLIGHT PROPULSION RESEARCH LAB CLEVELAND OH
|
| Wind-tunnel investigations were conducted to determine the total pressure recovery obtainable at a Mach number of 1.65 with a shock diffuser having projecting cones designed to produce two oblique shocks ahead of the diffuser inlet. Maximum total pressure recovery of 94.5% was attained with the best configuration at an angle of attack of 0 deg. With each cone, three oblique shocks appeared ahead of the diffuser inlet instead of the ... |
|
| Modeling and Reduction of Shocks on Electronic Components Within a Projectile |
|
24 pages |
| Authors:
NEVADA UNIV LAS VEGAS
|
| Electronic components within a projectile are subjected to severe loads over an extremely short duration during the launch process. Failure of these components during launch can result in negative effects on the mission of the projectile. While experimental data can be helpful in understanding failure of electronic components within a projectile, collecting such data are [sic] usually difficult. There are also limitations on the reliability of sensors under these circumstances. ... |
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Reports by Keyword(s)
SHOCK MITIGATION
