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本文扼要介绍了作者建立的颗粒介质中的浓悬浮粒子理论,并将数值计算与已发表的有关实验比较,得到了满意的一致性。关于海洋沉积物的声衰减系数与频率的关系,因为不同的作者在不同的频段得到不同的关系,即高频段(几千赫以上)近似为线性关系,低频段(1千赫以下)高于一次方关系,曾产生长时期的争执,而根据本文的理论,这一争执可以得到统一。本文对颗粒参数的声学测量进行了探索,强烈地认为,除了测量颗粒介质的平均粒径之外,还要测量其第二粒径参数(如方差)才能完整描写颗粒介质的性质。本文可以作为新型颗粒参数测量仪的理论基础The concentrated suspension theory in granular media set up by the author is presented concisely in this paper. By comparing its numerical results with the relevant data published, a satisfactory consistency can be obtained. As far as the relationship of the attenuation coefficients in marine sediments to the frequency is concerned, there has been a controversy among some authors for a long time, i.e. it appears to be a linear dependence upon frequency in the high-frequency range (higher than several kilohertz) and to be some deviation from first power dependence in the low-frequency range (lower than 1 kilohertz). However, according to our theory, reasonable unity can be acheived for them. Through an investigation on the measurement of the granular media by means of the acoustic method, the author believe that besides the mean diameter, the second granular parameter (such as the sorting coefficient) is necessary for a full characterization of granular media.This theory may give a theoretical basis to design new equipment for measuring granular parameters.
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