MATHEMATICAL MODEL FOR IMPACT TESTS ON CRASH BARRIERS

COMPUTER PROGRAM HAS BEEN DEVELOPED THAT SIMULATES IMPACTS OF VARIOUS VEHICLES WITH GUARDRAIL BARRIERS. THIS PROGRAM IS A DIGITAL SIMULATION SYSTEM, MAKING USE OF SEVERAL MATHEMATICAL MODELS. THE VEHICLE SIMULATION IS COMPOSED OF 3 MAJOR SEGMENTS: THE VEHICLE AS A RIGID BODY, THE STEERING GEAR, AND THE DEFORMATION OF THE BODY DUE TO THE IMPACT. THE BARRIER IS ESSENTIALLY A STRUCTURED BEAM ON MANY FLEXIBLE SUPPORTS; THE BEAM IS DIVIDED INTO A CERTAIN NUMBER OF ELEMENTS CONNECTED TO EACH OTHER AT THE NODES. THE VEHICLE AND THE BARRIER WORK IN THE FOLLOWING COMBINATIONS: DYNAMICS OF THE VEHICLE ALONE BEFORE IMPACT WHEN THE BARRIER IS MOTIONLESS AND UNDEFORMED; DYNAMICS OF THE VEHICLE AND THE BARRIER EXERTING FORCES ON EACH OTHER AFTER IMPACT; DYNAMICS OF THE VEHICLE AND THE BARRIER NOT EXERTING FORCES ON EACH OTHER WHEN THEY HAVE NO CONTACT AND THE BARRIER OSCILLATES BECAUSE OF INERTIA; AND DYNAMICS OF THE VEHICLE ALONE WHEN THERE IS NO CONTACT WITH THE BARRIER, WHICH IS MOTIONLESS AND DELORMED. A CERTAIN NUMBER OF FULL-SCALE TESTS HAVE BEEN COMPUTED, AND A FAIR AGREEMENT WITH EXPERIMENTAL RESULTS HAS BEEN OBTAINED. THE USE OF SUCH A PROGRAM WILL SUBSTANTIALLY REDUCE THE NUMBER OF FULL-SCALE TESTS. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 49-60
  • Monograph Title: Traffic safety barriers and lighting supports
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00222354
  • Record Type: Publication
  • Report/Paper Numbers: HS-014 197
  • Files: HSL, TRIS, TRB
  • Created Date: Jul 31 1974 12:00AM