各種作用力の不確かさを考慮した横風に対する鉄道車両の耐風性能評価

抄録

In this study, uncertainties of aerodynamic force, gravitational force, excessive centrifugal force and lateral vibration induced inertial force acting on the train cars are investigated based on the measured data. A performance function is then proposed based on the reliability theory and the safety indexes are assessed when the train operation regulations are performed. The code calibration is carried out to obtain an acceptable safety index and a formula with partial factors is proposed to calculate critical wind speeds of overturning. Finally, the safety indexes for several train operation conditions are assessed based on the critical wind speed of overturning predicted by three formulas. It is found that the safety indexes obtained by the proposed formula are nearly constant values, while those by the conventional formula show different values for different train operation conditions.