Abstract
The aeroclastic analysis of flexible structures, i.e. the flutter analysis of long span suspension bridge, is increasing importance in the wind resistant design., One of its key points is reliabilityof the unsteady aerodynamic force as one of the input data Most of existing research works are based on feasibility of the measurement itself., and extension in numerical 3D model has been almost ignored In this paper, some problems in the unsteady aerodynamic force are discussed and its key issues are proposed.
