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Optimization of a Simple Dynamic Model of a Railroad Car under Random and Sinusoidal Inputs
This investigation was concerned with techniques for determining values of damping and spring constants that would minimize the vibrations transmitted from irregular railroad track to passenger positions. Results developed for a three- degree-of-freedom model using a simplified representation of...Northeast Corridor Transportation Facts and Statistics
The material presented in the document is meant to provide basic information on the intercity transportation system and other select regional characteristics of the Northeast Corridor. Primary attention is given to the status of the existing transportation system and the magnitude and...Grumman Project 483 Tracked Air Cushion Research Vehicle
This document contains a table of contents and summary of the final report on the Tracked Air Cushion Research Vehicle to the Department of Transportation under the contract DOT-FR-9-0003.Review of Effects of Hypervelocity Jets and Projectiles on Rock
New methods are being continuously sought which will radically increase the rates of tunnel excavation. Attention has turned to the use of hypervelocity impact as a means of cutting and breaking rock, as well as the use of lasers, electric current, explosive drilling, high frequency vibration, etc...Design of Tunnel Liners and Support Systems
Contents: Introduction; Fundamentals of tunnel support design; Existing theories, design methods, and practices; Tunnel support systems in soil and soft rocks; Tunnel support systems in rock--Factors influencing behavior; Tunnel support systems in rock--Design procedures; Potential developments of...Analysis of Optimum and Preview Control of Active Vehicle Suspensions
The analysis leading to the optimum transfer function for an active suspension excited by a random guideway input is briefly reviewed and a design chart is presented. A parameter sensitivity study of the stability is performed and shows excellent system stability. The wheel-guideway contact problem...The Importance of Effective On-Track Safety Briefings
Following the implementation of the Roadway Worker Protection (RWP) Rule in 1997, there have been a total of 42 fatal RWP accidents, in which 44 roadway workers have perished, as of December 31, 2011. The FAMES Committee was able to obtain data to analyze 39 fatal RWP accidents, which accounted...DOTX 220 Schedule August 2016
DOTX 220 Schedule August