Calculation of Drive-Related Structure-Borne Sound in Electric Driven Trains using Elastic Multi-Body Simulation

Abstract

The structure-borne sound coming from the drive system defines especially for transient train manoeuvres the experienced interior noise of modern railway traction vehicles. A deeper look at the origin and the transmission of structure-borne sound is therefore of great importance to increase passenger comfort in newly developed trains. The possibility of modelling the vibration behaviour of an electric multiple unit train up to the acoustic frequency range using elastic multi-body simulation (EMBS) has been investigated in a joint research project of the Chair of Dynamics and Mechanism Design at TU Dresden and the company Alstom. Through usage of reduced order models of elastic bodies, the EMBS can be carried out in time domain in a computationally effi-cient way and non-linear system properties during motor run-up can be easily taken into account. Key research findings with regard to model structure and necessary level of detail of individual components (e.g. tooth contact, electric motor, roller bearings, elastic bodies, hydraulic dampers) of the elastic multi-body model can be shown. For validation purposes, measurements on individual parts, a motor-gear-unit test bench and the electric multiple unit on track have been carried out, results and comparison to simulation results can be presented.