Numerical Investigation of an Impact between an External Body and an Aerodynamic Surface

Mihai Ivănică ； Constantin Rotaru

《Frontiers in Aerospace Engineering》 3卷2期 (2014/05) Pp. 56-63

https://doi.org/10.14355/fae.2014.0302.04

並列摘要

This paper deals with a numerical study of aerodynamic surface impact phenomena, a very important objective in flight events investigation. The study started from the effects produced over the horizontal empennage of a helicopter involved in a significant flight event. Considering unnatural empennage rupture, which suggests a possible impact betweenan aerodynamic surface and a body before its collapse, and knowing helicopter flight parameters recorded by flight data recorder (FDR) systems, different possible cases have been studied of the impact between the empennage and an external body with different consistencies: a rigid one and an organic tissue one (e.g. a bird). In order to correctly describe the deformation and rupture of the empennage, due to the high strain rate the Johnson–Cook material model was used. Several 3D impact simulations were obtained showing aspects of the empennage deformation and rupture similar to the real ones and thus it was helpful to conclude the nature of the cause of the flight event.

並列關鍵字

SPH Method ； Helicopter Empennage ； FEM Material Model ； Spline Kernel Function ； Flight Data Recorder