摘要
本文研究周期结构的振动功率流特性,讨论了周期简支梁在力激振时由振源输入梁的功率流以及功率流沿梁的传播。在衰减域中振源不向梁输入功率流;在传播域中振源向梁输入功率流,其中在奇数传播域中输入的功率流比在偶数传播域中输入的功率流大得多。输入到梁的功率流转化为与梁内力相应的功率流,其中—半沿梁的正向传播而另一半沿梁的负向传播。
The vibrational power flow in a periodically supported beam excited by a force is investigated,ln non-propagation bands,no power is transmitted from the source to the beam;ln propagation bands,the power is transmitted from the source to the beam.Much more power is transmitted from the source to the beam in odd propagation bands,and less power is transmitted from the source to the beam in even propagation bands.The power supplied by the source is transferred to the power associated with shear force and with bending moment.One half of the power supplied travels along the beam in the positive direction and the other half in the negative direction.
出处
《振动与冲击》
EI
CSCD
北大核心
1990年第3期28-34,共7页
Journal of Vibration and Shock
