The fundamental equations of elastic mechanics were established through research of the spreading of elastic wave in honeycomb structure. The cut-off frequency was solved from the equations.
通过对弹性波在蜂窝结构中传播的研究，建立了弹性力学基本方程，得出了截止频率；
Basing on the fundamentals of elastic dynamics and the model of damaged mechanics, the basic equations of elastic wave propagation in damaged media are established.
利用弹性动力学基本原理和损伤力学模型建立了损伤介质中的波动方程。
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