STABILITY AND ACCURACY OF NUMERICAL BOUNDARY-CONDITIONS IN AEROELASTIC ANALYSIS

This paper analyses the accuracy and numerical stability of coupling p rocedures in aeroelastic modelling. A two-dimensional model problem as suming unsteady inviscid dow past an oscillating wall leads to an even simpler one-dimensional model problem, Analysis of different numerica l algorithms shows that in general the coupling procedures are numeric ally stable, but care is required to achieve accuracy when using very few time steps per period of natural oscillation of the structure. The relevance of the analysis to fully three-dimensional applications is discussed. (C) 1997 by John Wiley & Sons, Ltd.