Aeroelastic-Acoustics Simulation of Flight Systems

摘要

This paper describes the details of a novel numerical finite-element-based analysis procedure and a resulting codenfor the simulation of the acoustics phenomenon arising from aeroelastic interactions. Both computational fluidndynamics and structural simulations are based on finite element discretization employing unstructured grids. Thensound pressure level on structural surfaces is calculated fromthe rootmean square of the unsteady pressure, and thenacoustic-wave frequencies are computed from a fast Fourier transform of the unsteady pressure distribution as anfunction of time. The newly developed tool proves to be unique, as it is designed to analyze complex practicalnproblems involving computations in a routine fashion.