Method for estimating aerodynamic coefficient of railway vehicle

摘要

PROBLEM TO BE SOLVED: To provide an aerodynamic force coefficient estimation method of a railway vehicle capable of estimating an aerodynamic force coefficient in a wind state having disturbance by a simple method.SOLUTION: In an aerodynamic force coefficient estimation method of a railway vehicle, a statistical nature of a fluctuating wind speed is expressed as a fluctuating wind speed model, and the statistical nature of the fluctuating aerodynamic force is expressed as a fluctuating aerodynamic force model. A value being obtained in which the average aerodynamic force obtained from the fluctuation aerodynamic model is divided by the dynamic pressure of the average wind speed obtained from the fluctuation wind speed model and a representative area is defined as an average aerodynamic force coefficient, and an average aerodynamic force coefficient in a wind state having disturbance and an average aerodynamic force coefficient ratio in a wind state having no disturbance are calculated by a numerical calculation, and the aerodynamic force coefficient in the wind state having disturbance is estimated by integrating the average aerodynamic force coefficient ratio into the aerodynamic force coefficient obtained from a wind-tunnel test in the wind state having no disturbance.SELECTED DRAWING: Figure 3