| Theoretical Prediction of the Acoustical Nonlinear Field Radiated from a Concave Focusing Source with a Wide Aperture Angle |
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| 作者姓名： | 孙敏 章东 龚秀芬 |
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| 作者单位： | Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10474044 |
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| 摘 要： | We propose a time-domain theoretical approach to predict the acoustic nonlinear field radiated from a concave focusing spherical source with a wide aperture angle. The nonlinear sound propagation is theoretically described by an accurate mathematical model including the continuity and momentum equations. Numerical calculation is implemented by using the finite difference time domain algorithm in the oblate spheroidal coordinate system. To examine the validity of the theoretical model, we calculate the sound fields radiated from concave spherical focusing transducers with aperture angles 30° and 40° and the results are compared with those obtained by the SBE solution.
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| 关 键 词： | 理论预测 声学非线性域 凹聚焦源 宽孔角 时域理论 |
| 收稿时间： | 2005-11-25 |
| 修稿时间： | 2005-11-25 |
Theoretical Prediction of the Acoustical Nonlinear Field Radiated from a Concave Focusing Source with a Wide Aperture Angle |
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| SUN Min, ZHANG Dong, GONG Xiu-Fen.Theoretical Prediction of the Acoustical Nonlinear Field Radiated from a Concave Focusing Source with a Wide Aperture Angle[J].Chinese Physics Letters,2006,23(3):649-651. |
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| Authors: | SUN Min ZHANG Dong GONG Xiu-Fen |
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