The results show that the coupled bending-torsional vibrationrange increases and the motion changes from periodic motion to quasi-periodic motion as the mass eccentricity rises;
结果表明：随着质量偏心的增加，弯扭耦合区的范围增大，系统运动由周期运动变为概周期运动；
2
The appropriate guide bearing gap, it is possible to ensure that the vibration of the rotating shaft and bearings are within the permitted range.
合适的导轴承空隙，才可能同时保障转动轴与支座的振动均在准许范围内。
3
Use of a variety of rail profiles with a range of contact points improves steering and overall ride quality, and thereby reduces noise and vibration.