The Excitedfrequency of forced vibration diverge from the Natural frequency of the machine tool, and the machine tool can be put on the practical application.
机床受迫振动的激振频率避开了机床的固有频率，该机床可以投入实际应用。
2
Cropping mechanism is a key component for variant frequency vibration cropping, and its excitedfrequency directly affects manufacturing quality and production efficiency.
变频振动下料机构是变频振动系统的重要执行部件，其激振频率直接影响制造质量和生产效率。
3
For fixed damping and fixed excitedfrequency the motion of the beam under small amplitude of force is periodic, but becomes chaotic through period doubling bifurcation with increase of the force.