One-pass Performance of Vehicles on Fine-grained Soils PDF Download
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Author: Clifford J. Nuttall
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 158
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Book Description
Results are presented of an investigation of the one-pass performance of self-propelled vehicles in natural, weak, fine-grained soils for the following purposes: (1) to develop a reliable strength index for fine-grained soils with which predictions may be made of the performance of a vehicle on its first pass on a straight, level course, and a nominal vehicle load index to be used with the soil strength index to establish whether or not a vehicle will go; and (2) to provide means to predict one-pass drawbar pull and slope performance in soils having strengths in excess of the minimum required for one vehicle pass on level terrain, the increment of soil strength index necessary to permit a vehicle to maneuver freely, and the probable maximum speed of a vehicle operating in a terrain situation where the soil strength index exceeds the net vehicle load index. First-order answers are proposed to the five basic questions utilizing minor adaptations of techniques and concepts developed in the 50-pass trafficability work, and defining modified 'vehicle cone indices' (VCI1) and soil 'rating cone index' (RCI1) procedures appropriate to the one-pass problem. The ratio (VCI1/RCI1) is used as the basic soil loading numeric in simple approximate calculations of drawbar pull grade performance, soil strength increments necessary to permit free maneuvering, and probable maximum speeds, all as influenced by soil strengths.
Author: Clifford J. Nuttall
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 158
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Book Description
Results are presented of an investigation of the one-pass performance of self-propelled vehicles in natural, weak, fine-grained soils for the following purposes: (1) to develop a reliable strength index for fine-grained soils with which predictions may be made of the performance of a vehicle on its first pass on a straight, level course, and a nominal vehicle load index to be used with the soil strength index to establish whether or not a vehicle will go; and (2) to provide means to predict one-pass drawbar pull and slope performance in soils having strengths in excess of the minimum required for one vehicle pass on level terrain, the increment of soil strength index necessary to permit a vehicle to maneuver freely, and the probable maximum speed of a vehicle operating in a terrain situation where the soil strength index exceeds the net vehicle load index. First-order answers are proposed to the five basic questions utilizing minor adaptations of techniques and concepts developed in the 50-pass trafficability work, and defining modified 'vehicle cone indices' (VCI1) and soil 'rating cone index' (RCI1) procedures appropriate to the one-pass problem. The ratio (VCI1/RCI1) is used as the basic soil loading numeric in simple approximate calculations of drawbar pull grade performance, soil strength increments necessary to permit free maneuvering, and probable maximum speeds, all as influenced by soil strengths.
Author: Peter W. Haley
Publisher:
ISBN:
Category :
Languages : en
Pages : 136
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Book Description
Author:
Publisher:
ISBN:
Category : Heliports
Languages : en
Pages : 826
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Book Description
Author: Edgar S. Rush
Publisher:
ISBN:
Category : Trafficability
Languages : en
Pages : 78
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Book Description
Author: U.S. Army Engineer Waterways Experiment Station
Publisher:
ISBN:
Category : Soils
Languages : en
Pages : 180
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Book Description
Author:
Publisher:
ISBN:
Category : Military art and science
Languages : en
Pages : 140
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Book Description
Author: J. Y. Wong
Publisher: John Wiley & Sons
ISBN: 0470170387
Category : Transportation
Languages : en
Pages : 592
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Book Description
Technology/Engineering/Automotive Engineering for advancing ground vehicle mobility A standard text and reference for both the educational and professional communities, Theory of Ground Vehicles gives aspiring and practicing engineers a fundamental understanding of the critical factors affecting the performance, handling, and ride essential to the development and design of ground vehicles. In view of the growing concerns over environmental impact, energy efficiency, and safety, this new Fourth Edition has been revised and expanded to address these issues and other developments in the field. Retaining the contents and format of previous editions, the Fourth Edition introduces new material to reflect recent advances in ground transportation technology, including: * Computer-aided methods for design and performance evaluation of off-road vehicles and their practical applications * Emissions and fuel economy * Hybrid electric drives and fuel cells and their operating principles * Selection of vehicle configurations for off-road operations * Road vehicle stability control * ISO 2631-1:1997 and its applications to evaluating vehicle ride characteristics As in previous editions, this book focuses on applying engineering principles to the analysis of vehicle behavior. A large number of practical examples and problems are included throughout to help readers bridge the gap between theory and practice. With its broad coverage and pedagogical aids, Theory of Ground Vehicles, Fourth Edition remains the text of choice for students, engineers, and researchers wishing to master and apply basic theory to solve real-world, road and off-road vehicle mobility problems.
Author: U.S. Army Engineer Waterways Experiment Station
Publisher:
ISBN:
Category : Military geography
Languages : en
Pages : 178
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Book Description
"The study reported herein was a preliminary investigation made to provide guidance for a planned, longer range research program to develop and apply new and existing methods for measuring and predicting in quantitative and semiquantitative terms for effects of environmental factors on ground vehicles operating in Southeast Asia"--Vol. 1, p. ix.
Author: K. W. Wiendieck
Publisher:
ISBN:
Category : Ocean bottom
Languages : en
Pages : 148
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Book Description
Author: Dean R. Freitag
Publisher:
ISBN:
Category : Forestry engineering
Languages : en
Pages : 44
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Book Description
The Auburn Forest Engineering Research Unit of the U.S. Forest Service and the Mobility and Environmental Division of WES recently completed a series of tests to determine the application of the WES trafficability system to forestry problems. The tests were conducted in a dense, mixed, hardwood forest and a mature southern pine forest in the low-lying alluvial terrain near Vicksburg, Mississippi. The soils at the test site were wet, fine-grained soils classified as either CL or CH by the Unified Soil Classification System.
