Vibroacoustic Analysis of Laminated Sandwich Panels for Space Applications

This thesis presents a comprehensive vibroacoustic analysis of laminated sandwich panels designed for space applications, focusing on their structural and acoustic performance. The primary objective of this research is to assess the dynamic behavior of these panels using static, modal, and dynamic analyses. To achieve this, a high-order plate finite element model is employed, with simulations performed using the MUL2 code developed at Politecnico di Torino, accurately representing the complex mechanical characteristics of the sandwich structures. The dynamic response of representative laminated sandwich plates is analyzed, with modal analysis highlighting key vibrational modes. The results of the dynamic analysis are presented in terms of the Power Spectral Density (PSD) of displacements, stresses, and strains. A detailed Sound Pressure Level (SPL) analysis is also conducted, providing critical insight into the acoustic radiation properties of the panels, which is essential for assessing their performance in noise-sensitive aerospace environments. The results reveal distinct vibrational characteristics and acoustic behavior, providing valuable insights into optimizing the design of laminated sandwich panels for space structures. These findings contribute to both the structural integrity and acoustic performance of aerospace applications, ensuring reliability during the demanding launch phase and operation in space environments.