The bridge's dynamic features and train's running com fort under resonantspeed of simply supported beams with equal spans are analyzed.
分析了等跨布置的铁路简支梁桥在共振速度下的动力特性，及车辆运行平稳性和稳定性。
2
For simply and reliably improving the rotor's stability and suppressing the resonant vibration around the first critical speed, a new passive electromagnetic damper was proposed.
为了简单可靠地增加转子系统的稳定性、抑制转子的共振振峰，提出一种新型的被动式电磁阻尼器。
3
As the increase of running time, the resonant frequency of ultrasonic motor will decrease, which then leads to the decrease of speed.