| Predicting California Bearing Ratio from Trafficability Cone Index Values |
Oct-2008 |
121 pages |
| Authors:
Deborah Diemand; George Mason; Sally A Shoop; Wendy L Wieder; Peter M Seman; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
|
 | California bearing ratio (CBR) soil strength measurements are commonly used by the U.S. Air Force to identify locations suitable for use as expedient runways. Field CBR testing is a time-consuming operation requiring a skilled operator, and can be hazardous for the evaluation teams in hostile environments. Limited amounts of published CBR data are available. The measurement of trafficability cone index (CI), widely used by the U.S. Army for similar applications, ... |
|
| Standards for the Mobility Common Operational Picture (M-COP): Elements of Ground Vehicle Maneuver |
JUL 2007 |
235 pages |
| Authors:
Paul W. Richmond; Curtis L. Blais; Joyce A. Nagle; Niki C. Goerger; Burhman Q. Gates; Robin K. Burk; John Willis; Robert Keeter; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| Information needed to support ground mobility decision making is critical to the success of ground operations. The ability to rapidly obtain and process relevant information in a network-centric environment will empower warfare planners. In addition, future network centric operations that will include autonomous unmanned ground vehicles as envisioned in the Future Combat Systems program will increasingly require the exchange of well-structured information between human forces and robotic systems. Addressing this ... |
|
| Analysis of Small Unmanned Ground Vehicle Mobility Performance Algorithms |
01-Jun-2007 |
23 pages |
| Authors:
Paul Richmond; Jason Pusey; George Mason; Barry Coutermarsh; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| Presentation Overview: Project Overview; ERDC SUGV testing data analysis; Algorithm Analysis; Terrain EDM Analysis; Performance Comparisons; Future Work; Summary. |
|
| Validation of the Standard Mobility Application Programming Interface Fidelity 1 and 2 |
JUL 2006 |
135 pages |
| Authors:
Brendon Webb; William Fisher; ARMY MATERIEL SYSTEMS ANALYSIS ACTIVITY ABERDEEN PROVING GROUND MD
|
| This report documents the validation of the stand-alone Standard Mobility Application Programming Interface (STNDMob API) at Fidelity I and 2, hereafter referred to as the STNDMob. Fidelity 1 and 2 functionality addresses the lower resolution speed prediction capability of STNDMob, Version 3.2.3.0. Future efforts may consider STNDMob's medium resolution speed prediction capability referred to as Fidelity 3 and 4. At the time of this writing, the validation of Fidelity 3 ... |
|
| Expedient Repair Materials for Roadway Pavements |
MAR 2005 |
81 pages |
| Authors:
James E. Shoenberger; Wayne D. Hodo; Charles A. Weiss Jr.; Philip G. Malone; Toy S. Poole; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
|
| Materials for expedient roadway pavement repairs must provide a trafficable repair in a minimal amount of time. Therefore, any repair material must be able to cure quickly and be easy to use. There are a large number of proprietary cementitious rapid repair materials for both asphalt and concrete pavements. Three types of cementitious materials were used to make acceptable expedient repairs to an asphalt roadway. Trafficking showed that these materials ... |
|
| Procedure for Categorizing Ground Vehicles |
NOV 2002 |
63 pages |
| Authors:
E. A. Baylot; Burhman Q. Gates; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB
|
| The Modeling and Simulation (M&S) community models a large number of vehicle types. To ensure validity of these models, it's important to accurately represent vehicle mobility and logistical movements. Of course, the most accurate mobility representation would be to explicitly model each vehicle type. However, it is not practical to explicitly model every vehicle type in some applications, especially those simulating battalions and above. In those applications, vehicle classes are ... |
|
| South Asia: A Climatological Study Volume II: Continental South Asia |
01 MAY 2002 |
286 pages |
| Authors:
Melody Higdon; Robert Lilianstrom; Virgil Killman; Don Carey; Gary Clinton; AIR FORCE COMBAT CLIMATOLOGY CENTER ASHEVILLE NC
|
| This technical note is a climatological study of Continental South Asia. After describing the geography and major meteorological features of the entire region, the study discusses in detail the climatic controls of each of Continental South Asia's "five zones of climatic commonality." Each "season" is defined and discussed in considerable detail with emphasis on general weather, hazards, clouds, visibility, winds, precipitation, and temperature. |
|
| Methods of Obtaining Soil Strength Data for Modelling Vehicle Trafficability on Beaches |
SEP 2001 |
|
| Authors:
P. J. Mulhearn; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AERONAUTICAL AND MARITIME RESEARCH LAB
|
 | Estimates of vehicle mobility or trafficability over beaches are useful for the planning of amphibious operations. If the bearing capacity of a beach is too small, then beach matting, which is heavy and bulky, needs to be transported. If the bearing capacity is large enough then the matting can be left behind, saving space and time. Bearing capacity also effects the speed at which vehicles can transit the beach. A ... |
|
| 2001 UN Conference on Small Arms and Light Weapon in All Its Aspects |
13 AUG 2001 |
20 pages |
| Authors:
John W. Mentz; OFFICE OF THE UNDER SECRETARY OF DEFENSE FOR ACQUISITION TECHNOLOGY AND LOGISTICS WASHINGTON DC
|
| This report presents the viewgraphs for the 2001 UN Conference on Small Arms and Light Weapon in All Its Aspects. |
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| Development of Pedotransfer Functions with Neural Network Models |
12 JUN 2001 |
24 pages |
| Authors:
F. J. Leij; M. T. Van Genuchten; CALIFORNIA UNIV RIVERSIDE
|
| Unsaturated soil hydraulic properties determine the capacity of soils and rocks to retain and transmit water. Hydraulic properties may be needed in applications involving remediation and restoration of contaminated soils, trafficability of soils, flood control, and remotely sensed data. Current methods to measure hydraulic properties are perceived as inadequate to meet the data requirements for most (large scale) applications. Neural networks are used in our research to develop pedotransfer functions ... |
|
| Expedient MESL Construction in Cold Weather |
JUL 2000 |
29 pages |
| Authors:
Jeffrey A. Stark; Rosa T. Affleck; Sherri A. Orchino; ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
|
| A new method of constructing membrane-encapsulated soil layers (MESLs) using plastic membranes, geotextiles, tapes for sealing the membranes, and absorbents for drying the soil were demonstrated. These materials would allow construction of a MESL in cold weather. The demonstration took place at Fort Drum, New York, and at Ethan Allen Firing Range, Jericho Vermont. Three layers of a 271-g/m2 (8-oz/yd2) geotextile successfully protected the membrane ... |
|
| Wheels and Tracks Study (10-25 Ton Armoured Fighting Vehicles) |
MAR 2000 |
134 pages |
| Authors:
ROYAL MILITARY COLL OF SCIENCE SHRIVENHAM (UNITED KINGDOM)
|
| This study was conducted by tie Engineering Systems Department of Cranfield University, at the Royal Military College of Science. Shrivenham, UK, for the Department of the Army, United States Army Research Laboratory, Aberdeen Proving Ground, Maryland, USA. The scope of the study covers Terrain Accessibility (Section 1), Suspension and Automotive Performance (Section 2) and Other Factors (Section 3) in connection with tracked and wheeled armoured fighting ... |
|
| Military Examples of Coastal Engineering |
SEP 1999 |
63 pages |
| Authors:
Robert L. Wiegel; CALIFORNIA UNIV BERKELEY DEPT OF CIVILENGINEERING
|
| Coastal engineering is required for military ports and harbors and across-the-beach amphibious operations. Examples are given for operations during World War II, the Korean War, and the Vietnam Conflict, one very large (Normandy, France), and some small. Examples are provided to illustrate that no two beach operations are ever the same and that the effects of nature (storms and swell even in the absence of local ... |
|
| Utah Department of Transportation I-15 Case Study (Design-Build Contracting Strategy) |
11 JUN 1999 |
149 pages |
| Authors:
Donna Kimball; DEPARTMENT OF TRANSPORTATION WASHINGTONDC
|
| Because there is great potential for additional public works agencies using design build (best value) strategies, a need exists to document the salient features of the I-15 project. By studying this enormous project, the successes and lessons learned may be applied to the next negotiated project. In addition, if the contract continues on its successful path additional progressive legislation may be petitioned from state agencies seeking to increase the construction ... |
|
| The Military's Role in the Implementation of the National Security Policy on Counterdrugs |
08 FEB 1999 |
35 pages |
| Authors:
Kevin T. LaMar; ARMY WAR COLL CARLISLE BARRACKS PA
|
| There are those throughout our country that say we are gaining positive headway toward the counterdrug effort and that our government should begin to focus its efforts elsewhere. Others take the alternative view; that drug abuse is still prevalent and is actually increasing. Those with this second opinion believe the federal government should do more to curb this nationwide problem that is effecting the well-being of our citizens. Specifically, advocates ... |
|
| Rapid Stabilization of Thawing Soils for Enhanced Vehicle Mobility. A field Demonstration Project |
FEB 1999 |
80 pages |
| Authors:
Maureen A. Kestler; Sally A. Shoop; Karen S. Henry; Jeffrey A. Stark; Rosa T. Affleck; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| Thawing soil presents a formidable challenge for vehicle operations cross-country and on unsurfaced roads. To mitigate the problem, a variety of stabilization techniques were evaluated for their suitability for rapid employment to enhance military vehicle operations. A combination of mechanical stabilization methods including several lightweight fills, geosynthetics, and tire and wood mats, were constructed and tested during the annual training exercises of the 229th Engineers of the Wisconsin National Guard ... |
|
| Rail Operations Simulation at the Port of Tacoma |
1999 |
158 pages |
| Authors:
Martin A. Zybura; UNIV OF WASHINGTON SEATTLE
|
| This thesis investigates rail operations at the Port of Tacoma and describes the development of a modeling methodology and a simulation program for simulating rail operations at the port. The simulation examines the projected increase in intermodal rail traffic at the port until the year 2020. An analysis of the port is done and the results are presented and interpreted. Recommendations based on this study are made for future improvements. ... |
|
| The Use of Rigid Polyurethane Foam as a Landmine Breaching Technique |
DEC 1997 |
75 pages |
| Authors:
Albert L. Alba; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The results of a feasibility test using Rigid Polyurethane Foam (RPF) as an operational anti-personnel mine counter-mine technique are presented. RPF, at a given density and thickness, can withstand the explosive effects of anti- personnel blast mines and mitigate or neutralize the effects of surface laid anti-vehicular mines. A 12-inch thick, 4 pound per cubic foot foam block completely contained a 10 gram explosive charge of PETN while a 30-inch ... |
|
| Final Environmental Impact Statement for the Disposal and Reuse of the Department of Defense Housing Facility Novato, California: Volume II |
NOV 97 |
203 pages |
| Authors:
NAVAL FACILITIES ENGINEERING COMMAND SILVERDALE WA ENGINEERING FIELD ACTIVITY NW
|
| This report consists of six appendices. Topics include: Land Use; Utilities; Cultural Resources; Biological Resources; Traffic and Circulation and Final Environmental Baseline Survey. |
|
| East Asia-A Climatological Study, Volume 1: Continental |
SEP 1997 |
|
| Authors:
Donald E. Carey; Melody L. Higdon; Robert S. Lilianstrom; Charles D. Surls; AIR FORCE COMBAT CLIMATOLOGY CENTER SCOTT AFB IL
|
| The climatological study of East Asia is divided into two volumes. Volume 1 discusses the areas of East Asia that are most affected by continental air masses. This includes Tibet, Mongolia and northwest China. After describing the geography and major meteorological features of continental East Asia, the study discusses in detail the climatic controls of each of continental East Asia's three "zones of climatic commonality." ... |
|
| M-2 Bailey Bridge (M2BB) Palletization Test Report |
JUN 97 |
120 pages |
| Authors:
Anh V. Nguyen; ARMY TANK-AUTOMOTIVE COMMAND WARREN MI
|
| This report addresses the M-2 Bailey Bridge Palletization Test conducted at the U.S. Army Engineer School at Fort Leonard Wood, Missouri from 7 to 12 April 1997. The objectives of this test were to verify the feasibility of the M2BB Palletization Flatrack Load Configurations using M1/M1077 PLS Flatracks and to assure that these loads could be uploaded, downloaded, transloaded, and transported safely. The test was conducted successfully and its results ... |
|
| Southeast Asia-A Climatological Study |
MAY 1997 |
268 pages |
| Authors:
Kathleen M. Taxler; Christopher A. Donahue; Michelle E. Edwards; Kenneth P. Cloys; Kenneth R. Walters Sr; AIR FORCE COMBAT CLIMATOLOGY CENTER SCOTT AFB IL
|
| A climatological study of southeast Asia, a region that comprises Cambodia, Laos, Myanmar, Malaysia, Thailand, and Vietnam. After describing the geography and major meteorological features of the entire region, the study discusses in detail the climatic controls of each of southeast Asia 5 six zones of climatic commonality." Each "season" is defined and discussed in considerable detail, to include general weather, clouds, visibility, winds, precipitation, ... |
|
| Nonlinear Dynamics of Tracked Vehicles |
02 JAN 1997 |
10 pages |
| Authors:
Ahmed A. Shabana; CHICAGO UNIV IL
|
| The objective of this research project to develop nonlinear multibody computer methodologies that take into account the effect of the three dimensional interaction between the track chains and other vehicle components such as the sprockets, idlers, and the rollers as well as the effect of the dynamic coupling between the rigid body displacements and the elastic deformation of the vehicle components. In the methods developed in this research project, the ... |
|
| Proceedings, Second North American Workshop on Modeling the Mechanics of Off-Road Mobility |
JAN 97 |
262 pages |
| Authors:
D. A. Horner; G. L. Mason; Niki Dellman; R. A. Jones; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
| During a 3-day period, beginning March 13, 1996, the U.S. Army Engineer Waterways Experiment Station (WES), Mobility Systems Division, hosted a workshop to solicit expert opinions on where the virtual proving grounds are today and where they will be in the future. Three questions were asked at the start of the workshop: (1) what are today's capabilities in off-road virtual environments, (2) where the virtual proving grounds will be in ... |
|
| Mechanical Tests and Failure Analysis on Selected Components of the Class 60 Armored Vehicle Launched Bridge (AVLB) During the Class 70 Modification Program |
DEC 96 |
138 pages |
| Authors:
Howard E. Horner; ARMY RESEARCH LAB FORT BELVOIR VA
|
| The current Class 60 armored vehicle launched bridge (AVLB), with an overall length of 63 ft, is capable of carrying Class 60 (military load classification MLC - 60 tons) tracked and wheeled loads over a 60-ft-wide gap. The heavier, wider M1A1 main battle tank (Class 70 load) can cross the AVLB over a 50-ft-wide gap with precautions. Several modifications were proposed to upgrade a number of AVLBs from Class 60 ... |
|
| Results of Traction and Slope Climbing Tests with Selected Military Vehicles and Retrofit Tires in Support of Operation Desert Shield/Storm |
SEP 95 |
263 pages |
| Authors:
David M. Rogillio; William E. Willoughby; Randolph A. Jones; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
| Thirty six vehicle/tire configurations (thirty five commercial tires and one military tire) involving eight manufacturers were tested. The tests were conducted with a group of eight wheeled military support vehicles in a single loose sandy soil condition at YPG that was somewhat analogous to loose sandy soils in ME desert terrain. The loose, low strength sand was considered to be a worst case trafficability condition. Several tire pressures were used ... |
|
| Cold Regions Mobility Models |
FEB 95 |
78 pages |
| Authors:
Paul W. Richmond; Sally A. Shoop; George L. Blaisdell; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| This report annotates the cold regions mobility prediction routines included in the CAMMS/ALBE mobility models. It further explains the development of the algorithms that are used in these models to describe the interaction of a vehicle with terrain that has been affected by cold weather. The following terrain conditions are discussed: undisturbed snow (shallow and deep); disturbed snow (moderately trafficked and hard packed); ice; and thawing soils. Several combinations of ... |
|
| Three Approaches to Winter Traction Testing |
JUL 93 |
22 pages |
| Authors:
Sally A. Shoop; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| Traction on winter surfaces was measured using three test vehicles, each designed to measure traction for a different purpose: vehicle mobility research (CRREL Instrumented Vehicle), commercial tire testing (Uniroyal- Goodrich traction tester), and airport runway safety (Saab friction tester). The traction measured with each method is comparable, but there are systematic differences due to the effects of the surface material and the test and analysis technique. This comparison serves as ... |
|
| Long Term Modelling of Permafrost Dynamics |
FEB 93 |
|
| Authors:
M. G. Anderson; BRISTOL UNIV (UNITED KINGDOM)
|
|
| An Airborne Millimeter-Wave FM-CW Radar for Thickness Profiling of Freshwater Ice |
NOV 92 |
87 pages |
| Authors:
Norbert E. Yankielun; THAYER SCHOOL OF ENGINEERING HANOVER NH
|
| The ability to profile rapidly and accurately the structure of freshwater ice down to a thickness of a few centimeters over large surfaces of frozen ponds, lakes and rivers has wide military, industrial, commercial and recreational application, including safety and trafficability surveys. A prototype broadband millimeter wave (26.5 to 40 GHz) Frequency Modulated- Continuous Wave (FM-CW) radar, employing real-time data acquisition and Digital Signal Processing (DSP) techniques, has been developed ... |
|
| Brigade Automated Mission Assignment Model for Theater Level Simulation |
SEP 92 |
|
| Authors:
Grady H. Roby Jr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis models the interaction of nonlinear relationships based upon gathered expert judgments. The model developed reproduces a portion of the military expert's mission assignment decision-making process. Specifically, this thesis illustrates a method of combining the influences of experience, logistics, preparation time, continuous operations, mission, enemy, terrain type, visibility, engagement ranges and trafficability with varying brigade task organizations in order to identify the most mission ready brigade based upon expert ... |
|
| Tactical Mobility Modeling for REFORGER 87 |
Aug-1992 |
8 pages |
| Authors:
J D Lashlee; James H Robinson; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| The Waterways Experiment Station (WES) responded to requests by the U.S. Army III Corps, 64th Engineer Detachment (Terrain) by providing trafficability support for the REFORGER 87 military exercises in the Federal Republic of Germany. The maneuver area covered 25 1:50,000-scale topographic map sheets. A digital mobility database was developed within a period of one month. A principal source of information was Landsat Thematic Mapper (TM) data, which was integrated with ... |
|
| Visual Knowledge in Tactical Planning: Phase III Final Technical Report |
SEP 91 |
28 pages |
| Authors:
J. B. Gilmer; P. A. Merkel; ARMY INST FOR RESEARCH IN MANAGEMENT INFORMATION COMMUNICATIONS AND COMPUTER S CIENCES ATLANTA GA
|
| This report summarizes the Visual Knowledge in Tactical Planning project. The report details the process and the results of Phase III which focused on prototype development. The purpose of the software prototype was to demonstrate the interaction between visual and symbolic reasoning processes exercised during the planning of ground tactical maneuvers. The first prototype was developed as a visually oriented interface to a ground combat simulation. The tactical problem selected ... |
|
| Hourly and Daily Precipitation Frequencies for the United States |
AUG 91 |
|
| Authors:
Ruth L. Wexler; ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA
|
| This report presents daily and hourly precipitation frequencies for an extensive network of stations throughout the United States, from special summaries of observations obtained over the decade 1951-1960. When data are in format of cumulative percent frequency per precipitation rate, the daily and hourly distributions each form a fairly regular progression, per P/D or P/H, respectively (P= total precipitation, D= days, H = hours). The resultant models, in the form ... |
|
| Highway Snow Control Research in Japan |
SEP 90 |
|
| Authors:
Kazuhiko Itagaki; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| The wide range of Japanese efforts to control snow and ice on highways is reviewed. Many studies parallel U.S. and European research, but extensive basic studies of applications of modern high technology are noted as well. Keywords: Economic impact, Forecast, Highway, Japan, Snow and ice control, Snow melting facilities, Snow removal, Sociological impact, Trafficability. |
|
| Proposed 9th Infantry Division Force Conversion; Maneuver Damage, Erosion, and Natural Resources Assessment Fort Lewis, Washington. Volume 2: Plates |
AUG 90 |
|
| Authors:
Monte L. Pearson; Patricia A. Morris; Robert J. Larson; L. J. O'Neil; Michael R. Waring; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
|
| Ice Runways Near the South Pole |
JUN 89 |
|
| Authors:
Charles Swithinbank; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| Following an examination of air photographs of the Transantarctic Mountains, 37 blue-ice areas were reconnoitered from the air, using a ski-wheel Twin Otter operating from the South Pole. Two sites were selected as potential airfields for conventional transport aircraft, and ground surveys were made. On the Mill Glacier at 85 deg 06'S, 167 deg 15'E there is an area of smooth and level ice which gives a 7-km run directly ... |
|
| A Decision Algorithm for Nuclear, Biological, and Chemical Decontamination Using Dynamic Programming |
SEP 88 |
|
| Authors:
John C. Roberts; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis describes a decision algorithm developed to schedule land combat units for Nuclear, Biological, and/or Chemical (NBC) decontamination. It is an application of the Generalized Value System (GVS) of assigning unit value and power over time. The actual model is a PC based FORTRAN model that determines the optimal scheduling of contaminated units using a dynamic programming technique. Optimal in this application means minimal total time required for the ... |
|
| The US Army Yuma Proving Ground, Arizona 33-Year Climate Calendar and Tables on Associated Weather Elements 1954 - 1986. American Desert Country |
JUN 88 |
|
| Authors:
James C. Devine; ARMY LAB COMMAND WHITE SANDS MISSILE RANGE NM ATMOSPHERIC SCIENCES LAB
|
| This report contains an extremely well documented history of pure desert conditions over a 33-yr period (1954 through 1986). The desert region is in southwestern Arizona. In many cases this climate is similar to the Midwest regions. In addition to the general discussion of the terrain, climate, visibility, and other features of interest, extensive detail and analyses of most weather elements during this period are presented in the eight appendices. ... |
|
| Development and Initial Testing of the Automated Military Cone Penetrometer |
MAR 88 |
|
| Authors:
William E. Perkins; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
|
| Since the late 1950's, the US military forces and the US Army Engineer Waterways Experiment Station (WES) have successfully used an abstract value called the Cone Index (CI) as an indication of soil strength. The CI is the backbone in establishing the current empirical soil-vehicle relationship for predicting the ability of a soil to support sustained ground oriented military vehicle traffic. The military's conventional proving ring cone penetrometer is used ... |
|
| Determination of Network Attributes from a High Resolution Terrain Data Base |
SEP 1987 |
98 pages |
| Authors:
Seok C. Choi; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The purpose of this research is to develop algorithms for mapping terrain characteristics from a 100 meter grid representation to arcs and nodes of a transportation network. The algorithms capture elevation and trafficability parameters as they relate to both the arc itself and to the off-arc characteristics. These network, parameters are directly usable in appropriate optimization algorithms to determine minimum travel time path and minimum distance path through the network ... |
|
| Development of a Pavement Evaluation Method for Low-Volume Airfield Pavements |
SEP 87 |
|
| Authors:
Albert J. Bush III; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| The purpose of this study was to develop a falling weight deflectometer (FWD) based evaluation procedure to predict the allowable F-4 aircraft load and the allowable aircraft passes for marginal flexible pavements. Data from 11 pavement test sections that were trafficked to failure with an F-4 load cart were used to develop the evaluation methodology. Four of the test sections were constructed for the purpose of evaluating thin asphalt concrete ... |
|
| Automated Route Finder for Multiple Tank Columns |
SEP 87 |
|
| Authors:
John R. Benton; ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA
|
| The Automated Route Finder for Multiple Tank Columns computes multiple non-competing paths for columns of tanks. The network of available paths is represented by a graph-theoretic structure. Each arc of the graph has an associated cost which represents the time required to traverse the path corresponding to the arc. A best-first algorithm is used to search the graph in order to find the specified number of optimum paths. The algorithm ... |
|
| Steerability Analysis of Tracked Vehicles: Theory and User's Guide for Computer Program TVSTEER |
AUG 86 |
127 pages |
| Authors:
George Y. Baladi; Donald E. Barnes; Rebecca P. Berger; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB
|
| This report is a user's guide for the computer program TVSTEER, which predicts the steering performance of high-mobility/agility tracked vehicles in environments ranging from very soft soils to hard surfaces. In addition to a listing of the program (Appendix A), the report contains a glossary of the important variable names (Appendix B), typical sets of input and output data, a brief flowchart, and 10 sample runs. Appendix C describes a ... |
|
| Wildlife as an Indicator of Site Quality and Site Trafficability during Army Training |
DEC 85 |
|
| Authors:
Victor E. Diersing; William D. Severinghaus; CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
|
| Field studies were conducted on four prairies during May-June 1983 on the Pinon Canyon Maneuver Site and Fort Carson, CO, to characterize the relationship of soils and vegetation to bird and mammal species composition and abundance. Results strongly suggest that meadowlark numbers increase and horned larks decrease with increasing grass cover, and that kangaroo rats increase and pocket mice decrease with increasing soil sand. Estimating the numbers of each species ... |
|
| Desert Studies - A Global View |
23 AUG 85 |
24 pages |
| Authors:
John F. McCauley; Carol S. Breed; Maurice J. Grolier; GEOLOGICAL SURVEY FLAGSTAFF AZ
|
| Results of work on summary reports of the surficial geology and geomorphology of Coastal Peru, Western Desert of Egypt/Sudan, and deserts of China (including the Taklimakan, Badan Jarain, and Hohsi Corridor) are outlined. Sections of summary reports on these hyperarid regions have been published as journal articles, interim technical reports, and abstracts. Significant new findings have been described in interim published reports on the Western Desert. These include the discovery ... |
|
| Tropic Testing of Vehicles |
AUG 85 |
42 pages |
| Authors:
ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD
|
| This report fulfills the need for a document that establishes procedures for conducting mobility subtests in tropic environments. Facilities, instrumentation, test controls and data required are described, in addition to test procedures to be followed for conduct of the following mobility subtests: Soil tests: One-Pass Vehicle Cone Index, Drawbar Pull, Motion Resistance, and Acceleration/Deceleration; Surface Geometry Tests; Slope Negotiation and Discrete Obstacle; and Vegetation Tests; Single-Tree Override, Multiple-Tree Override and ... |
|
| Study on Controllability and Stability of High Speed Tracked Vehicles, |
AUG 1984 |
|
| Authors:
F. Eiyo; M. Kitano; NATIONAL DEFENSE ACADEMY YOKOSUKA (JAPAN)
|
| Numerous studies on mobility of tracked vehicles such as bulldozer and crawler tracters have been performed. The stationary turning motions of these vehicles have been reported recently. Most of these studies have been concerned with trafficability and traction mechanics in vehicle terrain interaction because these vehicles are used mainly in off-road motion at low speeds. However, there has not been any reported studies dealing with the controllability and stability of ... |
|
| Basic Study on the Turning Resistance of Track, |
AUG 1984 |
|
| Authors:
N. Sugiyama; H. Kondo; TOKAI UNIV HIRATSUKA (JAPAN)
|
| In recent years, the construction equipments have been even used on the soft ground. The vehicles of crawler type, such as bulldozer, are superior in the trafficability of off the road. On the contrary, the turning resistance may be several times larger than that of straight travelling. Therefore the turning performance of tracked vehicles gives a serious problem. Formerly, the turning resistance was calculated by using the adhesion coefficient or ... |
|
| A Lubricated Cone Penetrometer for Quantifying the Soil Physical Condition, |
AUG 1984 |
|
| Authors:
E. W. Tollner; GEORGIA EXPERIMENT STATION EXPERIMENT
|
| The cone penetrometer has for many years been used to characterize soils in terms of cone index in tillage, trafficability and soil-plant interaction studies. The instrument is highly portable and makes possible many measurements in a relatively short period of time. It has, therefore, been used widely to characterize soils where variation is often considerable. |
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Reports by Keyword(s)
TRAFFICABILITY
