Effects of armament placement on nonlinear dynamic behavior of high-aspect ratio wing due to shooting and blast-induced gust
Conference
Mardanpour, P, Izadpanahi, E, Rastkar, S et al. (2018). Effects of armament placement on nonlinear dynamic behavior of high-aspect ratio wing due to shooting and blast-induced gust
. 10.2514/6.2018-3391
Mardanpour, P, Izadpanahi, E, Rastkar, S et al. (2018). Effects of armament placement on nonlinear dynamic behavior of high-aspect ratio wing due to shooting and blast-induced gust
. 10.2514/6.2018-3391
The paper aims to investigate the effects of armament placement on the nonlinear time domain response of a high-aspect ratio wing exposed to blast load, blast-induced gust and mass release of the bullet. The computer code NATASHA (Nonlinear Aeroelastic Trim and Stability of HALE Aircrafts) which incorporates the geometrically exact, fully intrinsic, composite beam formulation of Hodges combined with Peters aerodynamic model are used in order to simulate the problem. The effect of gun placement at the root, 25%, 50%, 75% and the tip of the wing with different offset values are studied and flutter characteristics of each configurations are obtained. Flutter speed of the wing for armament placement at 75% of the span forward of the reference line is found to be a very large number. Additionally, nonlinear time domain analyses showed that for the armament placement close to the root as well as 75% of the span forward of the reference line, wing experiences no oscillation or very small magnitude damped LCO.
