Modal approaches are often preferred to the wave-based ones for the evaluation of instability conditions in classical nonlifting aeroelasticity of plates and shells. Here, within a wave-based finite element framework, sub- and supersonic aerodynamic models are introduced to analyze the effect of self-excited aerodynamic loading terms on the dispersive characteristics of structural waves. The method is validated by using a specific literature test case and is applicable on both isotropic and multilayered flat and curved structures. The sound transmission is also computed under sub- and supersonic turbulent boundary-layer excitations: the effect of including or neglecting the aeroelastic coupling is discussed.
Aeroelastic Effects on Wave Propagation and Sound Transmission of Plates and Shells
Franco, F.;De Rosa, S.;Petrone, G.;
2020
Abstract
Modal approaches are often preferred to the wave-based ones for the evaluation of instability conditions in classical nonlifting aeroelasticity of plates and shells. Here, within a wave-based finite element framework, sub- and supersonic aerodynamic models are introduced to analyze the effect of self-excited aerodynamic loading terms on the dispersive characteristics of structural waves. The method is validated by using a specific literature test case and is applicable on both isotropic and multilayered flat and curved structures. The sound transmission is also computed under sub- and supersonic turbulent boundary-layer excitations: the effect of including or neglecting the aeroelastic coupling is discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
