The unit "hertz" is equivalent to ()
The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the ().
The unit "hertz" is equivalent to ()
The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the ().
Hertz赫兹
已知:轮轨接触点处车轮滚动圆半径r,踏面曲率半径Rw,轨面曲率半径Rt,法向载荷N,轮轨材料的弹性模量E和泊松比σ。试写出Hertz理论求解接触椭圆长短半径a、b的步骤。