Structure-Borne Noise Contributions on Interior Noise in Terms of Car Design and Vehicle Type

Abstract

The aim of the investigation at hand was to elaborate a systemized view on the importance of structure-borne bogie noise on the interior noise by a comparative analysis of six different trains of different vehicle classes, construction methods and bogie designs. In doing so, it is intended to deepen the understanding of noise transmission into the passenger compartments of railway vehicles. For that purpose, the data sets of the different vehicles were analyzed similarly with the OTPA technique. This comparative analysis at typical train speeds clearly shows that there are agreements within the vehicle class and differences between the vehicle classes. The higher the maximum vehicle speed, the higher is the importance of structure-borne noise. This is caused firstly by the different bogie designs and second by the fact that the airborne transmission loss is improved for trains with a higher maximum speed, but the structure-borne transmission loss not to the same extent.