Flexible Aircraft Modelling for Flight Loads Analysis of Wake Vortex Encounters release_ame5drhag5hg7dw3xv2cjpxcqu

Abstract

This report describes the development of an integral simulation model for flexible aircraft and its application to the flight loads analysis of wake vortex encounters of a large transport aircraft. The aerodynamic model consists of a databank containing the steady aerodynamic loading of the quasi-flexible aircraft combined with an unsteady vortex lattice method for lifting surfaces and bodies. To improve accuracy and computational performance, a correction method based on steady reference data and an order reduction method are introduced. Aeroelastic coupling of the aerodynamic model to the structural model is achieved by a method based on finite interpolation beam elements. A parameterized wake vortex encounter is used to determine the loads-critical encounter type and to illustrate the impact of aircraft modeling on the obtained loads.
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