A numerical approach to investigate sound radiation from infinite cylindrical shells

Understanding the vibroacoustic behaviour of cylindrical structures and evaluating sound radiation are crucial for reducing unwanted noise in industrial environments and controlling breakout noise from ducts in buildings. However, analysing sound radiation through cylindrical shells is more complex than in plate-like structures due to additional modes arising from surface curvature and the coupling between structural and acoustic waveguides. This paper presents preliminary results of a numerical approach aimed at modelling sound radiation from infinite cylindrical shells to the external environment. The differences in sound radiation between planar and cylindrical structures are examined through numerical vibroacoustic simulations, analysing single and double-layer infinitely extended cylindrical shells. These preliminary results serve as a foundational basis for optimizing cylindrical acoustic mitigations for industrial applications.