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Type: Conference paper
Title: Pedestrian impact testing: Modelling the effect of head-form mass and speed
Author: Searson, D.
Anderson, R.
Citation: Proceedings of the 2008 Australasian Road Safety Research, Policing and Education Conference, 9-12 November, 2008: pp.23-32
Publisher: University of Adelaide
Publisher Place: CD
Issue Date: 2008
ISBN: 1876346566
Conference Name: Australasian Road Safety Research, Policing and Education Conference (2008 : Adelaide, Australia)
Editor: Anderson, R.
Organisation: Centre for Automotive Safety Research (CASR)
Statement of
D. Searson and R.W.G. Anderson
Abstract: Pedestrian impact testing is used to assess the relative level of protection from a vehicle to a pedestrian in the event of a collision. Testing is conducted as part of new car assessment programs (Euro NCAP, ANCAP), and for compliance with regulations in Europe and Japan. A key component of pedestrian impact testing is the head-form test, in which a dummy head-form is fired into the front of the vehicle in free flight, at specific locations typically on the bonnet or windscreen. The acceleration of the head-form is measured and is used to assess the relative level of protection at that location through calculation of the Head Injury Criterion (HIC). Alternative protocols specify different test head-form masses and speeds. This paper presents a model of the acceleration response of the head-form in any given test condition. Given a test with a known result, the model can be used to estimate the outcome of a test on the same structure using a different head-form mass and/or speed. The model is a non-linear damped Hertz model of contact. Validation data showed that the model estimates the HIC to within 10% of that obtained from test results. Simulation of a series of generic impact scenarios was conducted under the conditions of the Australasian New Car Assessment Program (ANCAP) and the draft Global Technical Regulation (GTR) on pedestrian protection, which stipulates a different head-form mass and speed. The results indicate a large discrepancy exists between performance in an ANCAP test and performance under the GTR, such that a structure that would pass the GTR may be rated very poorly under the ANCAP test.
Keywords: Pedestrian Testing
Contact Modelling
Description: Copyright © 2008 The Authors
Appears in Collections:Aurora harvest
Centre for Automotive Safety Research conference papers

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