철도차량 실물충돌시험설비 표준불확도 평가

초록

This paper reports standard uncertainties of full-scale crash testing facilities for a train. KRRI(Korea Railroad Research Institute) has established full-scale crash testing facilities which is the first testing facilities among Asian countries. The testing facilities enabled single item test, crash module test and full structure test including dummies for a occupant injury evaluation. Full-scale crash testing facilities consist of a crash barrier, dynamic load cell, high speed DAS(Data Acquisition System), a laser displacement sensor, dummies, a motor car and etc. The items for evaluation of standard uncertainties are impact load, displacement during impact, energy absorption and acceleration. Six dynamic load cells with a capacity of 3,000 kN each are used to measure the impact load and the data acquisition system records the converted voltage signal. Displacement during impact is measured with a laser displacement sensor which has high sampling capacity. Acceleration data are measured with several accelerometers attached to the specimen and moving car. Standard uncertainties of measurement devices were evaluated on the basis of the ISO guide(GUM: Guide to the expression of Uncertainty in Measurement)