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Journal of Theoretical and Computational Acoustics最新文献

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Fast Multipole Boundary Element Method for Aerodynamic Sound Field Analysis Based on Lighthill's Equation 基于Lighthill方程的气动声场分析快速多极边界元法
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-05-26 DOI: 10.1142/s2591728523500093
T. Masumoto, M. Mori, Y. Yasuda, Naohisa Inoue, T. Sakuma
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引用次数: 0
Comparison of clustering based Virtual SEA subsystem generation models 基于聚类的虚拟SEA子系统生成模型的比较
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-03-31 DOI: 10.1142/s2591728523500081
D. Sipos, D. Feszty
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引用次数: 0
High Resolution Backscattering Acoustic Tomography Method Based on Reverse Time Migration for Arbitrary Wideband Sounding Signal 基于逆时偏移的任意宽带探测信号高分辨率后向散射声层析成像方法
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-03-27 DOI: 10.1142/s2591728521500262
D. Sukhanov, Anzhela E. Kuzovova
Backscattered wave acoustic tomography using wideband probing signals makes it possible to obtain three-dimensional (3D) images of scattering inhomogeneities. Signal processing based on the reverse time migration (RTM) method allows one to take into account the influence of background refractive obstacles of the medium to minimize distortions of reconstructed tomographic images. We propose a noniterative method of acoustic tomography in an immersion medium based on RTM approach supplemented with linear signal preprocessing to enhance resolution of reconstructing tomography images. The visualization of scattering objects is based on wave inversion from the measurement area considering the probing wave field specially distorted to perform regularized back convolution. The applicability of the proposed method for visualizing scattering objects in water is shown analytically, numerically and experimentally. The proposed method is resistant to noise according to regularization. The results obtained show the agreement between the numerical and analytical solution. Using the example of sounding with linear frequency modulation signals, it is demonstrated that the proposed method allows increasing the resolution of tomographic images in comparison with conventional RTM. The novelty of the proposed method is the preliminary filtration of the forward propagation wave in the course of solving the inverse problem. This approach improves the resolution of tomographic images and allows considering the influence of obstacles.
使用宽带探测信号的后向散射声波层析成像可以获得散射不均匀性的三维(3D)图像。基于逆时偏移(RTM)方法的信号处理允许考虑介质的背景折光障碍的影响，以最小化重构层析图像的畸变。本文提出了一种基于RTM方法并辅以线性信号预处理的浸泡介质声层析成像非迭代方法，以提高重建层析成像图像的分辨率。散射目标的可视化是基于测量区的波反演，并考虑探测波场经过特殊畸变进行正则化反卷积。通过分析、数值和实验证明了该方法对水中散射物体可视化的适用性。通过正则化，该方法具有抗噪声性。计算结果与解析解吻合较好。以线性调频信号测深为例，与常规RTM相比，该方法可以提高层析成像的分辨率。该方法的新颖之处在于在求解反问题的过程中对正向传播波进行了初步过滤。这种方法提高了层析成像的分辨率，并允许考虑障碍物的影响。
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引用次数: 0
Geoacoustic inversion with a single vector sensor and multichannel dispersion curves 利用单矢量传感器和多通道色散曲线进行地声反演
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-03-08 DOI: 10.1142/s259172852350007x
Alexandre L. Guarino, Kevin B. Smith, K. Gemba, O. Godin
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引用次数: 0
Analysis of the Sound Pressure in Membrane-sealed Pistonphone 膜密封活塞筒内声压分析
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-02-09 DOI: 10.1142/s2591728523500068
Junjie Zhong, Wei Liu, Kaiwei Zhang, Fan Zhang, W. He
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引用次数: 0
Excitation of Scholte Waves at a Sinusoidal Interface of Seafloor 海底正弦界面处Scholte波的激发
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-01-20 DOI: 10.1142/s2591728523500056
Minshuai Liang, Gaokun Yu, Liang Wang, Linhui Peng
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引用次数: 0
Study of Gap Flow Effects on Sound Transmission Through a Micro-Perforated Sandwich Cylindrical Shell Excited by a Plane Wave 平面波激励下间隙流动对微穿孔夹层圆柱壳声传输影响的研究
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-01-20 DOI: 10.1142/s2591728523500044
Qunlin Zhang, Kaifang Que, Jinfu Du, Tong Zhao
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引用次数: 0
Statistical Characterization of Seismic Signals 地震信号的统计特征
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2023-01-05 DOI: 10.1142/s2591728522500049
Costas Smaragdakis, John Mastrokalos, Michael I. Taroudakis

This paper presents a study on the applicability of a method for the statistical characterization of seismic signals which is based on the statistics of their wavelet sub-band coefficients using α stable distributions. The method was originally applied to underwater acoustic signals of the type used in ocean acoustic tomography and seabed classification applications. The same protocol was applied to seismic signals representing the vertical displacement, measured on a traditional seismograph. The study showed that this process can indeed provide a means of characterizing a seismic signal and be used to estimate similarities between seismic signals, which is an important factor in studying seismic activity in an area.

本文研究了利用α稳定分布对地震信号的小波子带系数进行统计表征的适用性。该方法最初应用于海声层析成像和海底分类应用中使用的水声信号。同样的方法也适用于传统地震仪测量的代表垂直位移的地震信号。研究表明，这一过程确实可以提供一种表征地震信号的手段，并用于估计地震信号之间的相似性，这是研究一个地区地震活动的重要因素。
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引用次数: 0
Poly-grid Spectral Element Modeling for Wave Propagation in Complex Elastic Media 复杂弹性介质中波传播的多网格谱元模拟
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2022-12-30 DOI: 10.1142/s2591728523500032
C. Su, G. Seriani
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引用次数: 0
A frequency-domain formulation for predicting multi-frequency noise generated by flows with periodically moving boundaries 一种预测边界周期性移动的流所产生的多频噪声的频域公式
IF 1.9 3区 物理与天体物理 Q3 ACOUSTICS
Journal of Theoretical and Computational Acoustics
Pub Date : 2022-12-22 DOI: 10.1142/s2591728523500019
Zhiteng Zhou, Hongping Wang, Zhenyu Zang, Shizhao Wang
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引用次数: 0
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