Abstract
This paper describes the comparison between analysis and measurement of aerodynamic admittance functions for lift and moment. Sears' function which is a theoretical expression for the aerodynamic admittance for a thin airfoil is conventionally applied to the gust response analysis of long span bridges. Comparing to the experimental results of the aerodynamic admittance function for deck sections, the measured aerodynamic admittance functions are different from Sears' function and some experimental formulas have been suggested. However, these formulas are not sufficient to apply to various sections. Then we propose new prediction method of aerodynamic admittance functions for lift and moment utilizing flutter derivatives and these functions obtained by our method have been compared with the measured ones and verified to be accurate.
