Part II: Stochastic Simulations

1.3 Introduction

In the second part, the effects of stochastic uncertainties on the accuracy of static aeroelastic analysis are investigated. A parametric finite element model (see section 1.1) is used to simulate the scatter of the structural input parameters expressed as Gaussian standard normal distribution. Coupled aeroelastic analysis is performed to obtain the deviation of the wing aerodynamics for a discrete distribution of the stochastic input parameters using a high order panel code. A first order reliab­ility method is employed to calculate the probability of change of aerodynamic performance parameters due to the variation of structural stiffness properties. The results of the stochastic analyses performed for a simple test case are presented and demonstrate robust behavior of a coupled aeroelastic system subjected by moder­ately arbitrary structural parameters.