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六、振动的某些其他问题、结束语1.局部振动现象在动力设备作用下,结构物有时局部地区出现共振现象,例如某一区间的楼板共振,但其他部位则振动甚微。有时墙面并不振动但栏杆或铁梯则水平振动甚为严重。汽车通过楼房,有时引起窗户玻璃嘎嘎作响。这些现象都属于局部振动现象,前者多半属于中低频共振,而玻璃作响显属高频共振。
VI. Some other problems of vibration, concluding remarks 1. Partial vibration phenomenon Under the action of the power equipment, the structure sometimes has a resonance phenomenon in a local area, such as the resonance of the floor in a certain area, but other parts have little vibration. Sometimes the wall is not vibrating but the railings or ladders vibrate horizontally. As the car passes through the building, sometimes the windows glass creaks. These phenomena all belong to the phenomenon of local vibration. The former mostly belong to the low-middle resonance, and the glass is pronounced as high-frequency resonance.