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首页> 外文期刊>Journal of thermal stresses >THE ENERGY PROCESS OF PYROELECTRIC MEDIUM
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THE ENERGY PROCESS OF PYROELECTRIC MEDIUM

机译：热电介质的能量过程

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摘要

The fundamentals of energy process in the pyroelectric medium with generalized heat conduction theory are addressed firstly. From energy balance equation of pyroelectric medium, it is found that the energy density consists of the electric energy, the heat energy, the mechanical potential energy and the kinetic energy. The dissipation energy is attributed to the heat conduction, relaxation time and pyroelectric effect. The energy balance relation also identifies the energy flux which is independent of relaxation time. Accordingly the energy velocity is defined. The energy balance is obtained for inhomogeneous wave field. Plots of energy velocity and phase velocity in propagation and attenuation angle domain are presented, which show that the attenuation angle almost doesn't influence phase velocity of quasilongitudinal, quasitransverse I, II wave modes, while plays big role on the temperature wave. The energy velocities of the four wave modes all decay with the attenuation angle.
机译：首先介绍了热传导介质中能量过程的基本原理。从热电介质的能量平衡方程可知，能量密度由电能，热能，机械势能和动能组成。耗散能量归因于热传导，弛豫时间和热电效应。能量平衡关系还确定了与松弛时间无关的能量通量。因此，定义了能量速度。对于非均匀波场获得能量平衡。给出了传播角和衰减角域的能量速度和相速度图，表明衰减角几乎不影响准纵向，准横向I，II波模式的相速度，而对温度波起很大作用。四个波模的能量速度都随衰减角而衰减。

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