Vibroacoustic analysis of a submerged cylindrical shell under a turbulent boundary layer considering the effect of circumferential periodicity

Turbulent boundary layer (TBL) excitation is one of the main sources of radiated noise in submerged vehicles, which has significantly impact on vehicle’s acoustic performance. Traditional TBL-excited analyses mainly focus on flat plates; even for revolving shells, most studies merely map the TBL model onto the shell surface, neglecting the inherent spatial relationship between the structure’s configuration and the distribution of the TBL model. To address this issue, this paper proposes a spatial method for predicting the vibroacoustic response of submerged cylindrical shell excited by TBL. The conflict between the circumferential periodicity of the revolving shell and the spanwise extensibility of the TBL is resolved with integral variable transformation based on the spatial correlation. Comparative results demonstrate that circumferential periodicity significantly influences the cross-correlation distribution of the TBL-induced response in the low-frequency range. According to the spatial correlation, a novel adaptive locally-refined quadrature strategy is proposed and applied to both the TBL excitation response calculation and the Helmholtz integral for acoustic radiation. Compared to traditional composite Gaussian quadrature, this adaptive locally-refined quadrature mesh achieves significantly higher computational efficiency while maintaining comparable accuracy. This study provides an effective approach for predicting the dynamic responses of submerged revolving structures and offers guidance for the design and application of underwater vehicles.