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本文以动力实测为依据,用结构动力学的理论和方法,对杆件系统的整体振动、非整体振动、局部振动进行了一些研究,得到了如下的主要结果:彼此间有联系的杆件系统,在线弹性范围内,均呈整体振动,其频率序列是唯一的;有时出现的非整体振动及局部振动现象是整体振动的一种表现形式,其频率均属于这个唯一的序列;结构物内部是彼此互为强迫振动的;杆系平面内的振动可能出现“超质量”的情况;有时将杆系划分成几个部分进行计算是必要的、有益的。
In this paper, based on the dynamic measurement, with the theory and method of structural dynamics, some studies have been done on the overall vibration, non-integral vibration, and local vibration of the bar system. The following main results have been obtained: the bar systems that are related to each other. In the range of online elasticity, all of them show overall vibration and the frequency sequence is unique; sometimes the non-integral vibration and local vibration phenomena are a manifestation of the overall vibration, and the frequency belongs to this unique sequence; the inside of the structure is They are mutually forcibly vibrating; vibrations in the plane of the bar system may appear “super quality”; sometimes it is necessary and beneficial to divide the bar system into several parts for calculation.