Numeric simulation of aircraft gust response considering aeroelastic deformation

In this paper, the flowfield was numerically simulated through solving Navier-Stokes equations, and then the structure dynamic equations were coupled to simulate the gust response of aircraft. The AGARD 445.6 wing was taken as typical example to test the precision of aircraft flutter simulation platform established in this paper. The numeric simulation results were compared with wind tunnel test data. The “grid velocity” was introduced to simulate gust effect, and rigid wing gust response precision was tested in comparison with the correlative literature. The results show that the aircraft flutter simulation platform established is reliable. Business jet gust response considering aeroelastic deformation was simulated based on the flutter platform established in this paper. The flutter simulation mainly adopted modal superposition, in which four models were considered, and the model analysis was achieved by finite cell analysis technique; the “mapping surface” is used to realize CFD/CSD data transformation effectively. In this analysis example, the gust response was investigated, the results included the general displacement of each model and the pressure distribution of typical spanwise section. Comparison of the differences between rigid and elastic wing and the simulation results show that the lift coefficient peak of the rigid wing is greater than the value of elastic wing.