Nazarov VE, Kolpakov AB
Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia.
J Acoust Soc Am. 2000 Apr;107(4):1915-21. doi: 10.1121/1.428473.
The results of experimental and theoretical investigations of nonlinear acoustic phenomena (nonlinear losses, shift of resonance frequency, generation of the third harmonic, and nonlinear sound-by-sound damping) in polycrystalline zinc nonannealed and annealed resonating rods are presented. The measurements were carried out in the 10(-7)-10(-5) strain range at a frequency of about 3 kHz; the frequency of the weak ultrasonic pulse was about 270 kHz. The experimentally observed phenomena are described in frames of phenomenological equations of state containing elastic hysteresis and dissipative nonlinearity. The nonlinear acoustic parameters of these equations are determined by comparison between theoretical dependencies and experimental results. The influence of structural changes in zinc due to annealing on the nonlinear acoustic phenomena is shown.
本文给出了多晶锌未退火和退火谐振棒中非线性声学现象（非线性损耗、共振频率偏移、三次谐波产生以及非线性声声阻尼）的实验和理论研究结果。测量在10^(-7)-10^(-5)应变范围内、约3kHz频率下进行；弱超声脉冲频率约为270kHz。实验观察到的现象在包含弹性滞后和耗散非线性的唯象状态方程框架内进行描述。这些方程的非线性声学参数通过理论依赖关系与实验结果的比较来确定。展示了退火导致的锌结构变化对非线性声学现象的影响。
