Zaitsev Boris D, Teplykh Andrei A, Kuznetsova Iren E
Institute of Radio Engineering and Electronics of RAS, Saratov Branch, Saratov 410019, Russia.
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Mar;54(3):605-11. doi: 10.1109/tuffc.2007.283.
This paper is devoted to detailed theoretical investigation of energy density and power flow of homogeneous (bulk) and inhomogeneous (surface and plate) plane acoustic waves in piezoelectric materials and structures. The analysis of these waves in different materials of various crystallographic orientations allowed us to establish some energy regularities. These regularities are the same for instantaneous energy characteristics of homogeneous waves and for time-average energy characteristics on unit of aperture of inhomogeneous waves if the electrical energy and power flow in vacuum are taken into account. It has been shown that, for strong piezoactive waves, the electric energy density may exceed the mechanical energy density more than three times.
本文致力于对压电材料及结构中均匀（体）和非均匀（表面和板）平面声波的能量密度和能流进行详细的理论研究。对不同晶体取向的各种材料中的这些波进行分析，使我们能够建立一些能量规律。如果考虑真空中的电能和能流，这些规律对于均匀波的瞬时能量特性和非均匀波单位孔径上的时间平均能量特性是相同的。结果表明，对于强压电活性波，电能密度可能超过机械能密度三倍以上。
