Relating non-normality in the contact force distribution from measurements to physical phenomena in the dynamic contact between pantograph and overhead contact line in high speed railway infrastructure

The dynamic contact between Overhead Contact Line (OCL) and pantograph produces multiple outliers in high contact force values and the contact force is unlikely to be normally distributed. In the assessment of the dynamic contact only the mean value, Fm, the standard deviation, σ, and the coefficient of variation (COV), σ/Fmis used. Measurement data of 16 contact force measurements indicate high repeatability in the standard deviation and minimum contact force, but low repeatability of maximum contact force and the COV. Kurtosis and skewness can also be useful in the assessment and have better repeatability than the COV, which is an assessment parameter in the TSI ENE for current collection quality. These outliers in maximum contact force are expected at location where masses added on the contact wire create inertia forces in the dynamic contact.

ISBN:9789073802940

Publication year:2016

BOF-keylabel:yes

IOF-keylabel:yes

Authors from:Private, Higher Education