Mantouka A, Dogan H, White P R, Leighton T G
Institute of Sound and Vibration Research, Faculty of Engineering and the Environment, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom.
J Acoust Soc Am. 2016 Jul;140(1):274. doi: 10.1121/1.4954753.
A model for nonlinear gas bubble pulsation in marine sediments is presented. This model is then linearized to determine the resonance frequency and the damping terms for linear radial oscillations. The linear model is then used to predict the effects that such bubble pulsations will have on the sound speed and attenuation of acoustic waves propagating in gassy marine sediment. The results are compared for monodisperse populations against the predictions of a model of Anderson and Hampton and, furthermore, the additional abilities of the model introduced in this paper are discussed. These features include the removal of the sign ambiguities in the expressions, the straightforward implementation for acoustic propagation through polydisperse bubble populations, the capability to estimate bubble size distributions through a full acoustic inversion, and the capability to predict nonlinear effects.
提出了一种海洋沉积物中非线性气泡脉动的模型。然后将该模型线性化，以确定线性径向振荡的共振频率和阻尼项。接着使用线性模型来预测这种气泡脉动对在含气海洋沉积物中传播的声波的声速和衰减的影响。将单分散群体的结果与安德森和汉普顿模型的预测进行比较，此外，还讨论了本文所介绍模型的其他能力。这些特性包括消除表达式中的符号模糊性、通过多分散气泡群体进行声学传播的直接实现、通过全声学反演估计气泡尺寸分布的能力以及预测非线性效应的能力。
