论文部分内容阅读
针对混浊海水中悬浮的泥沙颗粒形状极其复杂,使得直接、准确计算混浊海水的声吸收几乎是不可能的问题,提出一种采用悬浮泥沙颗粒的中值粒径去计算悬浮泥沙颗粒粘滞声吸收系数的方法.同时,利用纯净海水声吸收经验公式可计算混浊海水中电解质的声吸收系数.计算的混浊海水在20~60 kHz的声吸收系数与混响法测量的声吸收系数进行了对比.理论计算值和实验测量值之间的平均相对偏差为23%,最大相对偏差不超过50%.表明,若已知混浊海水中悬浮泥沙颗粒的密度、浓度、中值粒径时,则可利用纯净海水声吸收经验公式和粘滞声吸收公式来计算混浊海水的声吸收系数.
It is almost impossible to directly and accurately calculate the acoustic absorption of turbid seawater because of the extremely complicated shape of the suspended sediment particles in the turbid seawater. A method is proposed to calculate the suspended sediment particle viscosity by using the median particle size of suspended sediment particles The acoustic absorption coefficient of the electrolyte in turbid seawater can be calculated by the empirical formula of pure seawater acoustic absorption.The calculated acoustic absorption coefficient of turbidity seawater at 20 ~ 60 kHz and the acoustic absorption coefficient measured by reverberation method The average relative deviation between the theoretical and experimental values is 23% and the maximum relative deviation is less than 50%, indicating that if the density, concentration and median particle size of suspended sediment particles in turbid seawater are known , The acoustic absorption coefficient of turbid seawater can be calculated using the pure seawater acoustic absorption empirical formula and the viscous acoustic absorption formula.