Railway source models for integration in the new Europeannoise prediction method proposed in HARMONOISE

摘要

The purpose of HARMONOISE European project is to provide an engineering model for the propagation of road and rail traffic which requires, for a better accuracy than existing models,the distinction between source output and propagation. In that context, the purpose of work package WP1.2 of HARMONOISE is to provide the emission data for railway sources to be implemented in the engineering model for the propagation. The output of the emission data useful as input of thepropagation calculations is the sound power level of equivalent moving point sources for at most fivefixed heights and the associated directivity, both in third octave bands. The purpose of HARMONOISE is to provide source models based on the most relevant physical parameters whichcan describe the three main sources: rolling, traction and aerodynamic. A database structure with some examples is also provided as well as guidelines for practical data collection. The paper will present first the main investigations which have been carried out through HARMONOISE to provide the source models based on their physical parameters. The paper will also present how the database is organised and linked with the HARMONOISE engineering model.