Evaluation of semi-empirical analyses for railroad tank car puncture velocity, part 2 : correlations with engineering analysis

Details

• Creators:
  Jeong, D. Y. ; Tang, Y. H. ; Perlman, A. B.
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.)
• Subject/TRT Terms:
  Impact Strength Impact Tests Mathematical Models Methodology Piercing Puncture Resistance Railroad Cars Tank Cars Velocity
• Publication/ Report Number:
  DOT-VNTSC-FRA-99-10 ; DOT/FRA/ORD-01/21.II
• Resource Type:
  Research Paper
• Geographical Coverage:
  United States
• Edition:
  Final Report ¿August 1998
• Corporate Publisher:
  United States. Federal Railroad Administration. Office of Research and Development
• Abstract:
  This report is the second in a series focusing on methods to determine the puncture velocity of railroad tank car shells. In this
  
  context, puncture velocity refers to the impact velocity at which a coupler will completely pierce the shell and puncture the tank.
  
  In the first report in this series, a set of semi-empirical equations was evaluated by comparing calculated puncture velocities with data
  
  from tank car impact tests. These equations were originally developed by the RPI-AAR Tank Car Safety Committee and later
  
  modified by the industry to account for head shield protection and jacket insulation. The semi-empirical equations generally
  
  produced reasonable and conservative estimates of puncture velocity when compared with the experimental data. However,
  
  differences between the calculated and observed results become more widespread when the tank is pressurized or when shield
  
  protection is present. Moreover, alternative methods to determine puncture velocity may be observed by the industry to avoid overdesign.
  
  In this report, methods to predict puncture velocity based only on engineering mechanics principles (i.e., no empiricism) are
  
  developed and described. Results from the semi-empirical approach are compared with results from the engineering methods. These
  
  methods rely on both analytical and computational tools to examine the structural behavior of tanks with ellipsoidal shapes. These
  
  tools include finite element and dynamic lumped mass models.
  
  
• Format:
  PDF
• Funding:
  R-9002/RR-928
• Collection(s):
  Volpe Center Federal Railroad Administration
• Main Document Checksum:
  urn:sha-512:2e8bf2cde263e7e36d588a33afae2dc5378ae4454ef0321755406b100a2eb4f8b9c5728f8e5b876a01d5a04408471d18eca07863ce292b6b324073275dcbc905
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/5248/dot_5248_DS1.pdf
• File Type:
  [PDF - 718.22 KB ]