Suppressing the onset of instabilities in the time-domain equivalent source method using a multistep approach

2017 ◽  
Vol 141 (6) ◽  
pp. 4810-4821 ◽  
Author(s):  
Yong-Bin Zhang ◽  
Chuan-Xing Bi ◽  
Xiao-Zheng Zhang ◽  
Liang Xu
Keyword(s):  
Time Domain ◽  
Equivalent Source ◽  
Source Method ◽  
The Time Domain ◽  
Equivalent Source Method

Sound Field Prediction and Separation in a Moving Medium Using the Time-Domain Equivalent Source Method

2017 ◽  
Vol 103 (3) ◽  
pp. 401-410 ◽  
Author(s):  
Zhao-Huan Wang ◽  
Chuan-Xing Bi ◽  
Xiao-Zheng Zhang ◽  
Yong-Bin Zhang
Keyword(s):  
Time Domain ◽  
Sound Field ◽  
Moving Medium ◽  
Equivalent Source ◽  
Source Method ◽  
The Time Domain ◽  
Equivalent Source Method

Acoustic Scattering in the Time Domain Using an Equivalent Source Method

AIAA Journal ◽  
2010 ◽  
Vol 48 (12) ◽  
pp. 2772-2780 ◽  
Author(s):  
Seongkyu Lee ◽  
Kenneth S. Brentner ◽  
Philip J. Morris
Keyword(s):  
Time Domain ◽  
Acoustic Scattering ◽  
Equivalent Source ◽  
Source Method ◽  
The Time Domain ◽  
Equivalent Source Method

Reconstruction of semi-free transient sound field under different reflection conditions using an extended interpolated time-domain equivalent source method

2014 ◽  
Vol 229 (5) ◽  
pp. 895-905 ◽  
Author(s):  
Siwei Pan ◽  
Weikang Jiang ◽  
Shang Xiang
Keyword(s):  
Time Domain ◽  
Free Field ◽  
Sound Field ◽  
Sound Sources ◽  
Equivalent Source ◽  
Source Method ◽  
Equivalent Sources ◽  
The Time Domain ◽  
Reflecting Surface ◽  
Equivalent Source Method

Transient acoustic field can be rebuilt directly in the time-domain via the interpolated time-domain equivalent source method (ITDESM). However, this method requires that the reconstruction should be addressed in the free-field only, which can hardly be met in the engineering noise problems. To circumvent this difficulty, an extended ITDESM procedure is developed by extending the ITDESM from the free-field to the semi-free-field. In this approach, the time-domain equivalent sources are placed not only near the actual sound sources but also around their image sources with respect to the planar reflecting surface. The solving procedure of the equivalent source strengths is improved to decrease the computing load. The reflection conditions treated here can be arbitrary, i.e. both perfectly rigid and impedance-effected. Reconstruction results of the transient sound field radiated from three monopoles under different reflection conditions demonstrate the validity and applicability of the proposed method.

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