本文由基本的守恒方程出发，获得了能描述回热器存在声直流时的非线性动力学模型及由此而导致的非线性时均热力学效应。
Based on basic conservation equations, the paper derived the thermoacoustic streaming model of a cyclic regenerator and discussed some nonlinear, time-averaged thermodynamic effects.
导出了用简正坐标即声子模式所表达的非线性晶格动力学和非线性宏观极化。
The nonlinear lattice dynamics and an expression of nonlinear macroscopic polarization are derived in terms of optic phonon modes.
基于弹性动力学理论，采用有限元方法数值模拟了声表面波沿金属表面传播及其与表面缺陷相互作用的过程。
Based on the theory of elastodynamics, the interaction of elastic surface acoustic waves with surface-breaking defect is studied numerically by using the finite element method.
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