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Mathematical Modeling of DODX Railcars

This report presents the results of a project conducted to determine the roll stability characteristics of large capacity freight cars, 100 to 200 ton, loaded with high center of gravity containers. The model, obtained from AAR, is a 22 degree-of-freedom, non-linear, time domain model of railcars...

Massachusetts Bay Transportation Authority Blue Line Vehicle Evaluation

The report presents the results of engineering tests carried out on a pair of rapid transit cars for the Massachusetts Bay Transportation Authority. The tests were performed at the Transportation Test Center, Pueblo, Colorado, from April 1979 through October 1979. The scope of the test program...

Laboratory Investigation of Track Gauge Widening Characteristics

This report describes test procedures and results of the AAR track gauge widening tests. The tests included static and dynamic lateral rail loadings under various vertical and longitudinal loads, relative effects of single and double axle gauge widening and single axle dynamic gauge widening under...

Laboratory Investigation of Lateral Track Shift

This report describes test procedures and results of the AAR lateral track shift tests. The tests included static and dynamic lateral track loadings under various vertical loads, relative effects of single and double axle loading, panel shift tests and single tie tests. These tests, which were...

Issues and Dimensions of Freight Car Size

This study presents a review and evaluation of the relationships between the safety and efficiency of rail transportation and the size of railroad freight cars. The study concludes that most larger cars can be operated safely over well-maintained track, but that large-capacity cars tend to exert...

Issues and Dimensions of Freight Car Size: A Compendium

An investigation is made into the effects of the size, weight, and length of freight cars on the safety and efficiency of U.S. rail transportation. A review is made of the historical and present population and usage of the U.S. freight car fleet. Distinct trends toward the purchase of larger,...

Freight Car Fatigue Test on FAST

As a result of observed cracks in the fabricated center sills of many freight cars in the FAST consist, a special Fatigue Analysis Test (FAT) was conducted on the FAST Track during August and September of 1978. This report provides an analysis of the static and dynamic strain data from a base case...

Dynamic Hopper Car Test

This report describes a test designed to establish the relationship between ride performance and track degradation, vehicle component wear, and the combined effect of rail degradation and component wear. The test was also designed to quantify the dynamic response of freight vehicles to different...