Study on the characteristics of underwater radiated noise induced by cabin airborne noise: Model testing and numerical simulation

The vibration and acoustic radiation characteristics of reinforced cylindrical shells under airborne noise excitation in underwater compartments were investigated using experimental and numerical simulation approaches. A numerical simulation model of the cylindrical shell structure was developed, and its accuracy was validated through experimental data. Acoustic radiation measurements were conducted in an anechoic tank for the reinforced cylindrical shell under white noise, fixed-frequency, and in-service load excitations. By comparing the experimental results with numerical simulations, the effectiveness of the analytical method for studying compartment airborne noise excitation characteristics was validated. The experimental and numerical results demonstrate that, within the frequency range of 100 Hz to 10 kHz, the simulation outcomes exhibit good overall agreement with the experimental measurements, with a maximum discrepancy of 4 dB between the two datasets. This further confirms the reliability of the proposed analytical framework for assessing airborne noise excitation characteristics in underwater compartments.