FREIGHT CAR DYNAMICS--DEMONSTRATION TEST AND ANALYSIS. VOLUME I--FREE VIBRATION STUDY

Comprehensive examination of dynamic characteristics of a trailer-on-flat-car (TOFC) is conducted in this report using the finite element method. Three basic models or idealizations of the flat car, ranging from a simple beam model to a more sophisticated model composed of plate and beam elements are developed to analyze its dynamic behavior. They are discussed here in some detail. Results of a test program conducted at the Department of Transportation Test Center are used to qualify these models by comparing the predicated vibration mode shapes and frequencies with those observed during the actual flat car tests. In this volume, the flexural and torsional mode shapes and their associated natural frequencies obtained from each of the models are analyzed and compared with experimental results. Analytical results are obtained using SAP4 and NASTRAN finite element computer programs. In a subsequent volume, the forced vibration response, including dynamic stress, will be examined and a demonstration of the application of this analysis to fatigue design evaluation will be carried out.

• Corporate Authors:

  Association of American Railroads Research Center

  3140 South Federal Street
  Chicago, IL  United States  60616
• Authors:
  • Garg, V K
  • Prasad, B
  • Yau, J F
• Publication Date: 1977-12

Media Info

• Features: References;
• Pagination: 192 p.

Subject/Index Terms

• TRT Terms: Computer programs; Dynamic tests; Finite element method; Flat cars; Freight cars; Trailer on flat car; Vehicle dynamics; Vibration
• Uncontrolled Terms: Dynamic analysis
• Old TRIS Terms: Freight car dynamics
• Subject Areas: Data and Information Technology; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00170623
• Record Type: Publication
• Source Agency: Association of American Railroads Research Center
• Report/Paper Numbers: R-280 Tech Rpt.
• Files: TRIS
• Created Date: Feb 16 1978 12:00AM