Anelastic damping of acoustic and seismic pulses
Anelastic damping of acoustic and seismic pulses
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声波和地震脉冲的滞弹性阻尼
DOI：
10.1007/bf01447906
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
L. Hastie
中科院分区：
文献类型：
--
作者：
F. Stacey;M. Gladwin;B. Mckavanagh;A. Linde;L. Hastie
地震衰减机制的线性或非线性这一基本问题尚未得到最后的回答。替代线性理论进行了比较，最近的测量衰减介质中的脉冲形状的退化。只有一个理论，由于阿兹米等人，1968年，通过测试。线性的假设与应力-应变滞后回线的观察相冲突，应力-应变滞后回线总是有尖（点）端，但没有成功的脉冲衰减滞后模型出现。叠加波衰减独立性的观测对于线性假设是至关重要的，但是到目前为止所有的叠加观测都是有缺陷的，因为它们考虑了相位不相关波的叠加，而只有相位相关波的叠加才是叠加的真正检验。
The basic question of the linearity or non-linearity of the seismic attenuation mechanism has not yet been conclusively answered. Alternative linear theories are compared with recent measurements of the degeneration of pulse shape in attenuating media. Only a theory due to Azimiet al., (1968) survives the test. The assumption of linearity conflicts with observations of stress-strain hysteresis loops which always have cusped (pointed) ends, but no successful hysteretic model of pulse attenuation has emerged. Observations of the independence of attenuations of superimposed waves are critical to the linearity assumption, but all superposition observations so far are defective in that they have considered the superposition of phase-uncorrelated waves, whereas only the superposition of phase-correlated waves is a true test of superposition.