海底沉积物声衰减与含水量关系的实验研究

A study of the relationship between acoustic attenuation of seafloor sediments and water content

海底沉积物从海底采样之后,要经过保存和运输之后才进行室内的声学物理参数测量,在这个过程中,样品不可避免的受到各种干扰。在实验室里制作了沉积物人工样品,模拟样品受到的干扰,通过测量受扰动的含水量的变化及其与声衰减系数的关系,经过频谱分析,得出随机扰动不易辨别,容易造成错误测试结果。对可能的扰动进行物理分析,并提出沉积物声衰减实验测量的若干建议。

seafloor sediment samples must be carried to Laboratory for indoor acoustical and physical parameter measurements after keeping and transporting the samples pick up from seafloor.In this course,the samples would unavoidably encounter various interferences.Making artificial samples in laboratory and simulating the interference that the samples encountered,the relationship between acoustic attenuation and disturbed water content can be examined.Through spectrum analyses,it can be concluded that the random perturbation is difficult to distinguish and the mistaken test result is apt to make.The possible perturbation is analyzed and some suggestion on experimental tests is put forward.