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/
- Record URL:
-
Supplemental Notes:
- Sponsored by Committee on Traffic Safety Barriers and Sign, Signal and Lighting Supports. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
-
Authors:
- GIAVOTTO, V
-
Conference:
- 52nd Annual Meeting of the Highway Research Board
- Location: Washington District of Columbia, United States
- Date: 1973-1-22 to 1973-1-26
- Publication Date: 1973
Media Info
- Media Type: Digital/other
- Features: Figures; References;
- Pagination: pp 49-60
- Monograph Title: Traffic safety barriers and lighting supports
-
Serial:
- Highway Research Record
- Issue Number: 460
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Barriers (Roads); Computer programs; Crash injury research; Crash tests; Crashes; Digital computers; Dynamics; Guardrails; Mathematical models; Research; Simulation; Vehicles
- Uncontrolled Terms: Barriers
- Subject Areas: Highways; Research; Safety and Human Factors; Vehicles and Equipment;
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