Uncertainty of estimated vehicle damage for random loads Bogsjö, K ; Rychlik, I
Utgivningsinformation: Göteborg Chalmers University of Technology and University of Gothenburg. Division of Mathematical Statistics. Department of Mathematical Sciences. Preprint 2008:41, 2008Beskrivning: 14 sÄmnen: Onlineresurser: Abstrakt: This paper presents two methods to estimate the variation coefficient for the accumulated damage, when only one measurement of the load is available. The methods are applied to loads on heavy vehicles travelling on uneven roads. The accuracy and precision of the estimates of the variation coefficient is evaluated using both a standard road profile model (Gaussian with spectrum according to ISO 8608) and a more realistic model that includes irregular sections. Four examples are presented to illustrate the performance of the estimates. Finally, the coefficient of variation is computed as a function of road length, for a real measured gravel road. Such an analysis indicate how long one need to measure, before vehicle damage variability can be neglected.This paper presents two methods to estimate the variation coefficient for the accumulated damage, when only one measurement of the load is available. The methods are applied to loads on heavy vehicles travelling on uneven roads. The accuracy and precision of the estimates of the variation coefficient is evaluated using both a standard road profile model (Gaussian with spectrum according to ISO 8608) and a more realistic model that includes irregular sections. Four examples are presented to illustrate the performance of the estimates. Finally, the coefficient of variation is computed as a function of road length, for a real measured gravel road. Such an analysis indicate how long one need to measure, before vehicle damage variability can be neglected.