Shrapnel Impact Probability Analysis Computer Code Development And Diagnostic Port Failure Analysis For LLNL's Explosives Testing Contained Firing Facility (CFF). PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Lawrence Livermore National Laboratory's (LLNL) Contained Firing Facility (CFF) is a facility to be constructed for explosives testing of up to 60 kg of cased explosives at LLNL's Site 300 Explosives Test Site. The CFF will be a large, rectangular, reinforced concrete firing chamber, lined with steel for shrapnel protection. The CFF will contain several glass ports for cameras, lasers, and other diagnostic equipment to be used for data collection during planned explosives detonations. Glass is used due to the need for the greatest possible optical clarity. This computer code and the associated study were developed during the CFF final design stage to determine probabilities and consequences (bounding and best estimate) of impact of shrapnel, due to concerns about the possible effects of rebounding shrapnel on these glass diagnostic ports. Inquiries and searches discovered no established methodology for doing quantitative shrapnel impact probability analyses. Discussions with programmers in the three-dimensional graphics community led to the conclusion that ray-tracing software could be adapted to do the analysis. So the decision was made to develop the computerized tools needed to do shrapnel impact probability analysis. The analysis approach was developed by the team as a whole. David E. Price (a Senior Safety Analyst with Onsite Engineering & Management, a sub-contractor at LLNL) led the team. Bob Spence (an independent consultant and developer supporting both Macintosh and Windows platforms, with a strong preference for the Macintosh, and with a particular interest in graphics/animation/image processing applications) developed the computer code algorithms and modified the POV-Ray code.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
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Book Description
Lawrence Livermore National Laboratory's (LLNL) Contained Firing Facility (CFF) is a facility to be constructed for explosives testing of up to 60 kg of cased explosives at LLNL's Site 300 Explosives Test Site. The CFF will be a large, rectangular, reinforced concrete firing chamber, lined with steel for shrapnel protection. The CFF will contain several glass ports for cameras, lasers, and other diagnostic equipment to be used for data collection during planned explosives detonations. Glass is used due to the need for the greatest possible optical clarity. This computer code and the associated study were developed during the CFF final design stage to determine probabilities and consequences (bounding and best estimate) of impact of shrapnel, due to concerns about the possible effects of rebounding shrapnel on these glass diagnostic ports. Inquiries and searches discovered no established methodology for doing quantitative shrapnel impact probability analyses. Discussions with programmers in the three-dimensional graphics community led to the conclusion that ray-tracing software could be adapted to do the analysis. So the decision was made to develop the computerized tools needed to do shrapnel impact probability analysis. The analysis approach was developed by the team as a whole. David E. Price (a Senior Safety Analyst with Onsite Engineering & Management, a sub-contractor at LLNL) led the team. Bob Spence (an independent consultant and developer supporting both Macintosh and Windows platforms, with a strong preference for the Macintosh, and with a particular interest in graphics/animation/image processing applications) developed the computer code algorithms and modified the POV-Ray code.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
Lawrence Livermore National Laboratory' s (LLNL) Contained Firing Facility (CFF) is a facility to be constructed for explosives testing of up to 60 kg of explosives at LLNL' s Site 300 Explosives Test Site. The CFF will be a large, rectangular, reinforced concrete firing chamber, lined with steel for shrapnel protection. The CFF will contain several glass ports for cameras, lasers, and other diagnostic equipment to be used for data collection during planned explosives detonations. Glass is used due to the need for the greatest possible optical clarity. This study was performed during the CFF final design stage to determine probabilities and consequences (bounding and best estimate) of impact of shrapnel, due to concerns about the possible effects of rebounding shrapnel on these glass diagnostic ports. We developed a customized version of the Persistence of Vision{trademark} Ray-Tracer (POV-Ray{trademark}) version 3.02 code for the Macintosh TM Operating System (MacOS{trademark}). POV-Ray creates three- dimensional, very high quality (photo-realistic) images with realistic reflections, shading, textures, perspective, and other effects using a rendering technique called ray-tracing. It reads a text file that describes the objects and lighting in a scene and generates an image of that scene from the viewpoint of a camera, also described in the text file. The customized code (POV-Ray Shrapnel Tracker, V3.02 - Custom Build) generates fragment trajectory paths at user designated angle intervals in three dimensions, tracks these trajectory paths through any complex three-dimensional space, and outputs detailed data for each ray as requested by the user, including trajectory source location, initial direction of each trajectory, vector data for each surface/trajectory interaction, and any impacts with designated model target surfaces during any trajectory segment (direct path or reflected paths). This allows determination of the three-dimensional trajectory of each simulated particle, as well as overall and individual fragment probabilities of impact with any designated target(s) in the three-dimensional model. It also allows identification of any areas of particular concern due to grouping (in discrete areas) of fragment paths that lead to hits on the target areas of concern. The default code output includes data for specified fragment paths up through four reflections, with the number of target hits for each path segment listed. Output is grouped by target number, arbitrarily assigned in order as the target objects are declared in the input model text file. Hits on the targets are listed by path segments (e.g., direct path, one bounce, two bounces, etc.). The code has the capability to output a separate data file containing full x, y, and z directional data for each fragment path, to output just the data for a user specified number of reflections, or to output data for just the paths that lead to hits on the specified targets. The code assumes that the shrapnel originates from a point source located at the defined camera position in the model. The shrapnel pieces are assumed to be ideal, spherical, point-sized objects. Travel paths are assumed to be short and at high speed, i.e., gravitational curvature of the shrapnel paths is ignored. Reflections are assumed to be ideal, i.e., the reflection angle is equal to the incident angle. Both irregular fragment shapes and rotational momentum of the fragments would be expected to cause individual fragments to deviate from the ideal fragment paths. However, the aggregate real-world fragment paths would not be expected to significantly deviate from the ideal paths because of the averaging out of the deviations. Any collisions or other interactions between fragments are ignored. The analysis code has the capability to simulate non-ideal reflections caused by irregular fragment shapes by introducing either regular or random surface roughness or bumpiness. However, no simulation method available in the analysis code has been identified to simulate the effects of rotational energy.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 32
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Book Description
In preparation for the planned Contained Firing Facility at LLNL's Site 300, various multi-layered shrapnel protection schemes were investigated with the intent of minimizing the amount of material used in the shielding. As a result of testing, it was found that two pieces of 1-in.-thick mild steel plate provide adequate general-purpose protection from shrapnel generated by normal hydrodynamic and cylinder shots at Bunker 801. 8 refs.
Author: Nondestructive Testing Information Analysis Center
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 286
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Author: Lotfia El Nadi
Publisher: World Scientific Publishing Company
ISBN: 9789814504881
Category : Physics
Languages : en
Pages : 0
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Book Description
The objectives of the conference are to develop greater understanding of physics research and its applications to promote new industries; to innovate knowledge about recent breakthroughs in physics, both the fundamental and technological aspects; to implement of international cooperation in new trends in physics research and to improve the performance of the physics research facilities in Egypt. This proceedings highlights the latest results in the fields of astrophysics, atomic, molecular, condensed matter, laser, nuclear and particle physics. The peer refereed papers collected in this volume were written by international experts in these laser fields.
Author: Anju Gattani
Publisher:
ISBN: 9781953100092
Category :
Languages : en
Pages : 344
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Book Description
To uphold family honor and tradition, Sheetal Prasad is forced to forsake the man she loves and marry playboy millionaire Rakesh Dhanraj while the citizens of Raigun, India, watch in envy. On her wedding night, however, Sheetal quickly learns that the stranger she married is as cold as the marble floors of the Dhanraj mansion. Forced to smile at family members and cameras and pretend there's nothing wrong with her marriage, Sheetal begins to discover that the family she married into harbors secrets, lies and deceptions powerful enough to tear apart her world. With no one to rely on and no escape, Sheetal must ally with her husband in an attempt to protect her infant son from the tyranny of his family.sion.
Author: Chretien de Troyes
Publisher: Yale University Press
ISBN: 0300038380
Category : Poetry
Languages : en
Pages : 244
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Book Description
A twelfth-century poem by the creator of the Arthurian romance describes the courageous exploits and triumphs of a brave lord who tries to win back his deserted wife's love
Author: Fabien Darrouzet
Publisher: Springer Science & Business Media
ISBN: 1441913238
Category : Science
Languages : en
Pages : 295
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Book Description
James L. Burch·C. Philippe Escoubet Originally published in the journal Space Science Reviews, Volume 145, Nos 1–2, 1–2. DOI: 10. 1007/s11214-009-9532-7 © Springer Science+Business Media B. V. 2009 The IMAGE and CLUSTER spacecraft have revolutionized our understanding of the inner magnetosphere and in particular the plasmasphere. Before launch, the plasmasphere was not a prime objective of the CLUSTER mission. In fact, CLUSTER might not have ever observed this region because a few years before the CLUSTER launch (at the beginning of the 1990s), it was proposed to raise the perigee of the orbit to 8 Earth radii to make multipoint measu- ments in the current disruption region in the tail. Because of ground segment constraints, this proposal did not materialize. In view of the great depth and breadth of plasmaspheric research and numerous papers published on the plasmasphere since the CLUSTER launch, this choice certainly was a judicious one. The fact that the plasmasphere was one of the prime targets in the inner magnetosphere for IMAGE provided a unique opportunity to make great strides using the new and comp- mentary measurements of the two missions. IMAGE, with sensitive EUV cameras, could for the rst time make global images of the plasmasphere and show its great variability d- ing storm-time. CLUSTER, with four-spacecraft, could analyze in situ spatial and temporal structures at the plasmapause that are particularly important in such a dynamic system.
Author: Bennett H Wall
Publisher: Hassell Street Press
ISBN: 9781015031500
Category :
Languages : en
Pages : 32
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Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Phil Foglio
Publisher: Simon and Schuster
ISBN: 1949102289
Category : Fiction
Languages : en
Pages : 484
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Book Description
In a time when the Industrial Revolution has become an all-out war, mad science rules the world—with mixed success. In Agatha H and the Siege of Mechanicsburg, Agatha Heterodyne, the last of the Heterodyne family, has returned to her family’s hereditary town with the might of the Wulfenbach Empire hot on her heels. The only thing holding off an outright attack is Gilgamesh Wulfenbach, the heir to the Empire, who has joined Agatha and her friends inside the great artificially intelligent fortress of Castle Heterodyne. Now they must race to repair the mechanisms that once allowed the Castle to defend Mechanicsburg, before the rest of Europa shows up to take all the revenge the mad Heterodynes of the past so richly earned. From the Hugo Award–winning Girl Genius online comics comes this fourth book in the Agatha H. series, and like the previous three books, it will engage you in a unique world of adventure, romance, and mad science!
