简正振动,正常振动
It is proved that if the concentrated mass is small and located at the node or antinode of some mode normal vibration of the nonloaded beam, the frequency has a maximum or minium value as the position of the concentrated mass varies.
理论证明:如果集中质量很小(对梁的质量而言),当集中质量的位置改变,位于无载梁的某次简正振动的节点(腹点),振动频率具有极大(极小)值。
The frequencies of the normal vibration and spectral entropy of diborane
乙硼烷的简正振动频率和光谱熵
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