Crippling test of Budd M--1 passenger railcar : test and analysis results

Details

• Alternative Title:
  Proceedings of the 2014 Joint Rail Conference, April 2-4, 2014, Colorado Springs, CO.
• Creators:
  Carolan, Michael ; Perlman, Benjamin ; Jeong, David ; Gordon, Jeff
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.) ; United States. Department of Transportation. Federal Railroad Administration. Office of Research and Development
• Subject/TRT Terms:
  Buckling Crash Energy Management Crippling Finite Element Method Load Tests Passenger Cars Passengers Railroad Cars Railroad Safety Occupied Volume Integrity Structural Analysis Train Crews

  More +
• Publication/ Report Number:
  JRC2014-3824
• Resource Type:
  In Proceedings
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  American Society of Mechanical Engineers ; Institute of Electrical and Electronics Engineers ; American Society of Civil Engineers
• Abstract:
  The Federal Railroad Administration’s (FRA) Office of
  
  Research and Development is conducting research into the
  
  occupied volume integrity (OVI) of passenger railcars. OVI
  
  refers to a passenger railcar’s ability to preserve space for
  
  passengers and crew during accident loading conditions. The
  
  information developed in this research program will form the
  
  basis for establishing alternative OVI evaluation procedures.
  
  These alternative procedures, in turn, will allow a wider variety
  
  of passenger railcar designs to have their OVI evaluated, will
  
  provide guidance for applying modern engineering
  
  technologies, such as finite element analysis (FEA), and will
  
  continue to ensure a level of safety in evaluated vehicles
  
  equivalent to conventional evaluation.
  
  As part of this research program, two tests and
  
  corresponding FEA were conducted on a Budd M-1 passenger
  
  railcar that had been retrofitted with crash energy management
  
  (CEM) components on both ends. This testing and analysis
  
  program was sponsored by FRA and carried out by
  
  Transportation Technology Center, Inc. (TTCI), Arup, and the
  
  Volpe Center. An 800,000 pound load test was conducted on
  
  March 13, 2013 and was intended to elastically deform the car.
  
  The data generated during this test were, in turn, used to
  
  validate FE models of the M-1 car. The second test was
  
  performed on July 17, 2013. This test introduced loads into the
  
  occupant volume through its CEM attachment points until the
  
  ultimate, or crippling, load was reached. By loading the
  
  occupant volume through the CEM components, the test load
  
  path is similar to the load path that would be traveled by
  
  collision loads during activation of the CEM system.
  
  This paper presents the results of the crippling test,
  
  discusses the sequence of buckling that was observed to occur
  
  in the test, and compares the results of the test with the results
  
  from FEA of the test conditions. During the crippling test, the
  
  car exhibited a crippling load of 1.1 million pounds. This value
  
  is consistent with crippling loads reached by two Budd Pioneer
  
  cars that were previously tested in an FRA program. The
  
  buckling sequence of the members making up the M-1’s
  
  occupant volume were particularly well-captured by strain
  
  gages during this most recent test. The load path through the
  
  occupant volume and the sequence of progressive buckling of
  
  structural members is discussed. Additionally, the presence of
  
  existing damage and previously-repaired areas and their likely
  
  effects on the crippling behavior of the car are discussed.
  
  
• Format:
  PDF
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha-512:f7b76b898fc4d743dd7b28e2223a9eeb778b91bddf9ca7365bc33a1dc45a68bf61b322a116d1fe428b6d4824a1059a0b14c161df7d77efc340242bbf23750a07
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/12042/dot_12042_DS1.pdf
• File Type:
  [PDF - 1.43 MB ]