Forecasting Urban Rail Transit Vehicle Interior Noise and Its Applications in Railway Alignment Design

Abstract EN

In this study, a data-driven interior noise prediction model is developed for vehicles on an urban rail transit system based on random forest (RF) and a vehicle/track coupling dynamic model (VTCDM).

The proposed prediction model can evaluate and optimize the sustainability of railway alignment from the perspective of interior noise.

First, a data collection framework via embedded sensors of onboard smartphones was developed.

Then, for establishing the mapping relationship between the dynamic responses of the car body and interior noise, the collected dataset was fed to the RF.

Parameter, error distribution, and feature importance analyses were conducted for evaluating and optimizing the performance of the RF.

With the optimized parameters, the probability of prediction errors being within 5 dB was 86.9%.

Next, the VTCDM was established using an existing industry multibody simulation tool and verified through a comparison between the simulated and field dynamic responses.

Finally, a case study that extends the application of this interior noise prediction model to railway alignment design is presented.