【摘要】 基于Ｆｏｌｄｙ的理论，对水下气幕的相干和非相干声透射特性进行了分析。结果表明：随着气泡体积分数或气幕厚度的增加，非相干声透射在气幕的声透射中所起的作用相对增大；当满足一定的条件时，非相干声透射将在气幕的声透射中占主导地位。更多还原

【Abstract】 Although Foldy way back in 1945[3] proposed the concept of incoherent transmission through bubbly liquids, no research results have been found in the open literature concerning incoherent transmission through underwater bubbly curtain. We utilized Foldy’s concept and theory to explore theoretically this important problem.We obtained Eqs.(19),(23),and(24)for calculating incoherent transmission coefficients.In Fig.2,we compare the sound transmission losses with(solid line)and without (dotted line) consideration of incoherent transmission. The dotted -line results were computed by Qian et al[1] and by Commander[2].The solid line results were computed by Eq.(24). The comparison shows that incoherent transmission can not be neglected.Fig. 3 gives the variation of F, which is an important term in Eq.(24),with volume fraction β.As β increases,F can be much higher than 1.We can see from Eq.(24) that F= 1 marks a turning point.When F<1,coherent transmission is predominant.When F>1. incoherent transmission is predominant.Incoherent transmission can be neglected only when F is very small.更多还原