有界空间内复杂液体介质中气泡相关的非线性声响应

项目名称： 有界空间内复杂液体介质中气泡相关的非线性声响应

项目编号： No.11204168

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 王成会

作者单位： 陕西师范大学

项目金额： 26万元

中文摘要： 本项目将研究超声波作用下有界空间内复杂介质中气泡的非线性振动规律，同时探讨气泡运动对周围介质的影响。第一，探讨不同管径内气泡的振动规律，建立管内气泡非线性动力学模型，研究管的存在对气泡振动模式的影响，以期找出气泡在管内振动的本质特征；第二，利用解析法和数值法探讨管内非线性振动气泡与声场、周围介质和管壁间的相互作用，目的在于寻找与管内非线性振动气泡相关的空化效应的定量描述方法；第三，分析弹性管壁对非线性振动气泡的响应，如弹性形变、破裂等，从管壁本身的物理特征出发研究强超声波作用下管壁破裂的物理机制，为控制超声剂量提供理论和实验基础。本项目的主要目的在于发展单气泡和泡群在管内非线性振动的基本理论，分析其在高强度超声波作用下同周围介质的相互作用机理，为解决高强度超声波在生物组织、血液等复杂介质中传输时遇到的声学问题作出应有的努力。

中文关键词： 气泡；非线性振动；耦合振动；相互作用；声响应

英文摘要： In this project, we will explore the nonlinear oscillation of bubbles in finite space filled with mixed liquid medium, at the same time, the interaction of bubbles and surrounding medium will be taken into account. First, for the purpose of making clear the essential properties of bubbles, the the forced oscillation of bubbles will be researched for the condition that the tubes are of different radii, and the dynamics models will be introdeced in accordance with the motion modes of bubbles in tubes. Second, the interactions between bubbles and driving acoustic field, surrouding medium and tubes' wall will be studied using analytical methods and numerical methods in order to find a way which can be adopted to describe quantitatively cavitation effects in tubes. Third, the responses of elastic wall of tubes to oscillating bubbles, such as elastic deformation and rupture, will be taken into account. Based on the physical nature of material and structure of tubes, the mechanism of deformation and rupture will be researched, which can help us to ulderstand how to control the dose of ultrasound. Our main purposes is to develop the basic theories of nonlinear oscillation of single bubble or bubble clusters, and analyze the mechanism of interaction between bubbles and surrounding mediums. What we research will make an e

英文关键词： bubble；nonlinear oscillation；coupled oscillation；interaction；acoustic response