If the main frequency is near or equal to self vibration of multiplayer construction, the resonate may be occurred, then multiplayer construction will be severity destroyed.
如主频率低到接近或等于多层建筑的自振频率，则有可能发生共振现象，致使多层建筑遭受严重破坏。
This paper analyzes the modal of Y7125 gear grinder spindle, gets out the main four stages of spindle vibration frequency and deals with the data.
基于有限元方法，对Y7125型磨齿机的砂轮主轴进行模态分析，得出了四阶主振动频率，并对数据进行了处理。
The safety of a main well headframe would be reduced significantly, due to increased loading capacity and higher vibration frequency in a coalmine.
由于煤矿主井井架提升能力的增加，引起井架杆件受力增大，受迫振动频率增大，导致安全性能降低。
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