Download or read book Predicting the Mobility and Burial of Underwater Unexploded Ordnance UXO Using the UXO Mobility Model ESTCP 200417 written by and published by . This book was released on 2009 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ESTCP Unexploded Ordnance (UXO) Mobility Model (MM) validation program expanded the capabilities of the vortex lattice based model previously developed by the Navy for mine modeling applications and then validated the MM with surrogate ordnance in two instrumented field demonstration, one in each of the most common coastal environmental types (Trailing Edge and Biogenic Reef):U.S. Army Filed Research Facility (FRF), Duck, NC, and pacific Missile Range Facility (PMRF), Kauai, HI. The MM correctly predicted all the basic behaviors of the surrogates; the skill factor for modeling migration and burial exceeded 0.8 in both cases, a favorable result with respect to modeling coastal processes and mine burial prediction. The MM is calibrated for the most common coastal environmental and can use wither default environmental conditions or site-specific data inputs to more accurately predict overall probability of movement. It is noted that the primary cost drivers for varying levels of analysis is predicated on the amount of site data available.
Download or read book Predicting the Mobility and Burial of Underwater Unexploded Ordnance UXO Using the UXO Mobility Model Field Test Report PMRF Barking Sands Kauai Hawaii written by and published by . This book was released on 2008 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: A process-based underwater unexploded ordinance (UXO) Mobility Model (MM) was developed and exercised with field measurements obtained at two separate offshore sites in a biogenic reef environment off the west coast of the island of Kauai, HI, at the Pacific Missile Range Facility (PMRF), Barking Sands. The MM was used to generate hydrodynamic forcing, UXO migration, and UXO burial simulations that were in general agreement with the ensemble results from 24 inert surrogate 5?/38 projectiles that were monitored between 13 February and 27 June 2007.
Download or read book Simple Parameterized Models for Predicting Mobility Burial and Re exposure of Underwater Munitions written by Carl T. Friedrichs and published by . This book was released on 2018 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of 761 observations of scour-induced burial and 406 observations of initiation of motion of UXO-like objects are presented. The main factors that increase the scour-induced burial-to-diameter ratio (B/D) under (i) currents and (ii) waves are the (i) Shields parameter (S) and (ii) Keulegan-Carpenter number. For cylinders under waves, B/D additionally increases as the current component parallel to wave orbitals decreases, as S increases, and as the angle between wave orbitals and a cylinder's axis increases. Cylinders bury most, then spheres, and conical frustums bury least. Simple models dependent on these variables explain 85% of observed variance in B/D. Onset of motion is parameterized by fi S_Ucrit, where S_Ucrit is the critical object mobility parameter, and fi accounts for inertia forces from time-varying pressure gradients. S_Ucrit is observed to decrease systematically as D/k increases, where k is the bed roughness. Theory combined with observations lead to fi S_Ucrit = a1(D/k)^b1. Observations give a1 = 1.75 and b1 = - 0.72, which explains 89% of the observed variance in fi S_Ucrit.
Download or read book Classification and Mapping of Underwater Unexploded Ordnance UXO written by David Wicklund and published by . This book was released on 1997-12-01 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the summer of 1995, the Naval Facilities Engineering Service Center (NFESC) established a calibrated Unexploded Ordnance (UXO) test range offshore the Pacific Missile Range Facility (PMRF), Barking Sands, Kauai. The objective of the range was to provide an area that could be used to validate the performance of commercially available geophysical sensing systems for the mapping and classification of underwater UXO. The range included a calibration site and an operational site, and covered an area of 1.55 square nautical miles. The University of Hawaii Marine Minerals Technology Center (MMTC) conducted a demonstration effort on the range. Evaluation of the MMTC demonstration was performed by NFESC. A total of 257 inert ordnance pieces and 41 false targets were precisely placed on and under the seafloor in water depths from 1 to 50 meters. Targets ranged in size from groups of 7.62-millimeter cartridges to single MK83 bombs. This report describes the design, installation, and decommissioning of the range and includes a summary and evaluation of the MMTC demonstration activities.
Download or read book Mobility of Unexploded Ordnance Using Spherical Surrogates in the Swash Zone written by Benedict M. Gross and published by . This book was released on 2019 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Predictive and probabilistic models require physical data to implement a practical procedure for monitoring and removing munitions or unexploded ordnance (UXO). Physical UXO response to wave forcing varies depending on the shape, location and density of a given munition. A laboratory experiment was conducted to study the mobility of spherical munition surrogates for cluster bombs (BLU61).
Download or read book Classification and Mapping of Underwater Unexploded Ordnance UXO written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the summer of 1995, the Naval Facilities Engineering Service Center (NFESC) established a calibrated Unexploded Ordnance (UXO) test range offshore the Pacific Missile Range Facility (PMRF), Barking Sands, Kauai. The objective of the range was to provide an area that could be used to validate the performance of commercially available geophysical sensing systems for the mapping and classification of underwater UXO. The range included a calibration site and an operational site, and covered an area of 1.55 square nautical miles. The University of Hawaii Marine Minerals Technology Center (MMTC) conducted a demonstration effort on the range. Evaluation of the MMTC demonstration was performed by NFESC. A total of 257 inert ordnance pieces and 41 false targets were precisely placed on and under the seafloor in water depths from 1 to 50 meters. Targets ranged in size from groups of 7.62-millimeter cartridges to single MK83 bombs. This report describes the design, installation, and decommissioning of the range and includes a summary and evaluation of the MMTC demonstration activities.
Download or read book Discrimination of Subsurface Unexploded Ordnance written by Kevin A. O'Neill and published by . This book was released on 2016 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unexploded ordnance (UXO) pose a persistent and expensive problem throughout the world; over 11 million acres are potentially contaminated in the U.S. alone. However, detection requires a very high degree of reliability, the false alarm rate is typically enormous, and cleanup costs are very high. This Tutorial Text addresses the unique challenges of UXO detection and the following topics: fundamental physics and phenomenology; new, successful modeling and analysis methods; the design, development, and testing of new instruments that provide expanded and superior data; innovative processing techniques; and highly successful discrimination performance in blind field tests at standardized sites. The book is written for lay scientists and engineers, as well as specialists in the field, requiring only some familiarity with basic vector calculus and matrix methods, common statistical concepts, and elementary physics.
Download or read book Discrimination of Subsurface Unexploded Ordnance written by Kevin A. O'Neill and published by . This book was released on 2015 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unexploded ordnance (UXO) pose a persistent and expensive problem throughout the world; over 11 million acres are potentially contaminated in the U.S. alone. However, detection requires a very high degree of reliability, the false alarm rate is typically enormous, and cleanup costs are very high. This Tutorial Text addresses the unique challenges of UXO detection and the following topics: fundamental physics and phenomenology; new, successful modeling and analysis methods; the design, development, and testing of new instruments that provide expanded and superior data; innovative processing techniques; and highly successful discrimination performance in blind field tests at standardized sites. The book is written for lay scientists and engineers, as well as specialists in the field, requiring only some familiarity with basic vector calculus and matrix methods, common statistical concepts, and elementary physics.
Download or read book Scoring Underwater Demonstrations for Detection and Classification of Unexploded Ordnance UXO written by Shelley M. Cazares and published by . This book was released on 2020 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shallow Water UXO Technology Demonstration Site Scoring Record written by and published by . This book was released on 2007 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the efforts of AMEC Earth and Environmental, Inc., to detect and discriminate inert unexploded ordnance (UXO) using an underwater towed sensor array designed by 3DGeophysics. Testing was conducted at ATC, Standardized Shallow Water UXO Technology Demonstration Site. A description of the tested system and an estimate of survey costs along with the analysis of the system performance are provided.
Download or read book Measuring Discharge with Acoustic Doppler Current Profilers from a Moving Boat written by David S. Mueller and published by CreateSpace. This book was released on 2014-06-16 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mission of the U.S. Geological Survey (USGS) Water Resources Discipline is to provide the information and understanding needed for wise management of the Nation's water resources. Inherent in this mission is the responsibility of collecting data that accurately describe the physical, chemical, and biological attributes of water systems. These data are used for environmental and resource assessments by the USGS, other government agencies and scientific organizations, and the general public. Reliable and quality-assured data are essential to the credibility and impartiality of the water-resources appraisals carried out by the USGS.
Download or read book Naval Mine Warfare written by National Research Council and published by National Academies Press. This book was released on 2001-09-19 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea mines have been important in naval warfare throughout history and continue to be so today. They have caused major damage to naval forces, slowed or stopped naval actions and commercial shipping, and forced the alteration of strategic and tactical plans. The threat posed by sea mines continues, and is increasing, in today's world of inexpensive advanced electronics, nanotechnology, and multiple potential enemies, some of which are difficult to identify. This report assesses the Department of the Navy's capabilities for conducting naval mining and countermining sea operations.
Download or read book Sperryscope written by and published by . This book was released on 1925 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reduction of a Ship s Magnetic Field Signatures written by John J. Holmes and published by Morgan & Claypool Publishers. This book was released on 2008 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decreasing the magnetic field signature of a naval vessel will reduce its susceptibility to detonating naval influence mines and the probability of a submarine being detected by underwater barriers and maritime patrol aircraft. Both passive and active techniques for reducing the magnetic signatures produced by a vessel's ferromagnetism, roll-induced eddy currents, corrosion-related sources, and stray fields are presented. Mathematical models of simple hull shapes are used to predict the levels of signature reduction that might be achieved through the use of alternate construction materials. Also, the process of demagnetizing a steel-hulled ship is presented, along with the operation of shaft-grounding systems, paints, and alternate configurations for power distribution cables. In addition, active signature reduction technologies are described, such as degaussing and deamping, which attempt to cancel the fields surrounding a surface ship or submarine rather than eliminate its source. Table of Contents: Introduction / Passive Magnetic Silencing Techniques / Active Signature Compensation / Summary
Download or read book ARL TR written by Aerospace Research Laboratories (U.S.) and published by . This book was released on 1973 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mine Drop Experiment MIDEX written by Anthony F. Gilless and published by . This book was released on 2001-09-01 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Navy's Impact Burial Prediction Model (IMPACT 25) determines the amount of burial a mine experiences upon impacting the marine sediment. Impact burial calculations are derived primarily from the sediment characteristics and from the mine's two-dimensional air and water phase trajectories. Accurate burial prediction requires that the model's air and water phase trajectories reasonably mimic the objects true trajectory. IMPACT 25 assumes that the objects are cylindrical in shape and calculates the air and water phase trajectories entirely from momentum equations. In order to determine what effect a varying center of mass has on a mine's water phase trajectory, a Mine Drop Experiment was conducted. The experiment consisted of dropping three cylinders of various lengths into a pool where the trajectories were filmed from two angles. The controlled parameters were, the ratio of mine length to diameter, initial velocity, center of mass position and drop angle. Results indicate that center of mass position has the largest influence on the object's trajectory and that accurate trajectory modeling requires the inclusion of both momentum and moment equations.
Download or read book Soviet Military Review written by and published by . This book was released on 1983 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
