Noise Radiation Characterization of Long-Distance Belt Conveyors in Conveying Corridor: Measurement and Prediction

Abstract

Abstract. Effective noise control in belt conveyor systems is crucial for promoting environmentally sustainable practices in bulk material transportation. Here, the noise radiation characteristics of long-distance belt conveyor systems are investigated by field measurements and numerical simulations. Field measurements conducted at a cement production facility reveal that operational noise levels exceed both occupational health and environmental regulatory thresholds. Using the finite element method, numerical calculations reveal that the belt speed significantly influences noise radiation patterns, with increased speeds leading to higher noise levels and a shift in dominant noise frequencies toward higher bands. A noise prediction model is developed and verified, showing good agreement with field measurement results. In addition, several noise mitigation strategies are proposed and evaluated, including the installation of sound barriers and the use of polyethylene idlers, as well as a reduction in belt speed during nighttime operations, which effectively reduces noise levels within the corridor and at nearby residential areas. This study provides a comprehensive understanding of noise radiation behavior in belt conveyor systems and delivers practical, engineering-oriented solutions to support more sustainable industrial operations.