3-D FDTD Analysis of Sound Field Focused by Biconcave Acoustic Lens for Normal Incidence
3-D FDTD Analysis of Sound Field Focused by Biconcave Acoustic Lens for Normal Incidence
复制标题
法向入射双凹声学透镜聚焦声场的 3-D FDTD 分析
DOI：
10.1143/jjap.44.4696
复制
发表时间：
2005
影响因子：
1.5
通讯作者：
A. Hasegawa
中科院分区：
文献类型：
--
作者：
K. Mori;Toshiaki Nakamura;T. Yokoyama;A. Hasegawa
近年来，时域有限差分法（FDTD）被广泛应用于水下声传播的分析。有证明的优点，这种FDTD方法在获得数据的快照的声压分布和一系列的波形在任何一点。此外，该方法便于将诸如声源和媒体等因素建模到分析域中。在这项研究中，进行了三维FDTD分析，以获得由双凹声透镜专门测量垂直入射的球面波聚焦的声场。此外，分析的结果进行了比较，在水箱中获得的实验结果。在声源频率为500 kHz、声透镜与声源距离为1.78 m、衰减常数为0.5-1.0 dB/λ的条件下，实验得到的焦点位置、轴上特性和波束方向图与FDTD方法的模拟结果吻合较好。
Recently, the finite difference time domain (FDTD) method has been frequently used for the analysis of underwater sound propagation. There are demonstrated advantages of this FDTD method in terms of obtaining data regarding snapshots of sound pressure distribution and a series of waveforms at any point. In addition, the method facilitates the modeling of factors, such as the sound source and media into the analysis domain. In this study, a three-dimensional FDTD analysis was carried out in order to obtain the sound field focused by a biconcave acoustic lens specialized to measure the normal incidence of the spherical wave. Additionally, the results of the analysis were compared with experimental results obtained in a water tank. When the frequency of the sound source was 500 kHz, the range between the acoustic lens and the sound source was 1.78 m, and the attenuation constant was 0.5–1.0 dB/λ, the experimental results regarding the position of the focal point, the on-axis characteristics and the beam pattern were all found to agree well with the simulation results obtained by FDTD method.
并行计算三维时域有限差分法航空超声波传感器声场分析
DOI：
--
发表时间：
2004
期刊：
Jpn.J.Apl.Phys. Vol.43 No.5B
影响因子：
--
作者：
Y.Yamada ;T.Tsuchiya;N.Endoh
通讯作者：
N.Endoh
DOI：
--
发表时间：
2006
期刊：
Proc. of 8th European Conference on Underwater Acoustics 11
影响因子：
--
作者：
S.Matsumoto;T.Tsuchiya;T.Anada;N.Endoh
通讯作者：
N.Endoh