Study on Numerical Simulation for Vibro-Acoustic Response of Spacecraft

Abstract

The limitations of the finite element method (FEM) mainly on numerical dispersion errors and on model dimension indicate that an alternative deterministic approach is necessary for the coupled vibro-acoustic analysis in the higher frequency range. Therefore, a novel approach called the wave base method (WBM) is discussed since it requires no meshes, and subsequently provides no dispersion errors and small model dimension. A 2-dimensional WBM code is then developed, and some examples are solved to show some advantageous features of the WBM. Moreover, a simple vibro-acoustic simulation on spacecraft is demonstrated, and local responses can be obtained due to its deterministic characteristic. It is also shown that the WBM has high potential for the vibro-acoustic analysis with the wide frequency range.