This thesis presents a comprehensive modal analysis of the new test section for the acoustic wind tunnel at the Department of Turbomachinery and Fluid Dynamics, University of Hannover. The study aims to evaluate the impact of contact modifications between key components on the overall dynamic behaviour of the system. Using ANSYS and the Finite Element Method (FEM), several progressively complex models were developed, beginning with a simplified representation of the substructures and culminating in a fully detailed model that integrates all modifications. The analysis reveals that, while the overall system exhibits high stiffness, only a limited number of vibration modesare noticeably affected by the modifications.