论文期刊

An approach to investigate the multiple-scattering problems based on the singularity expansion method




作者: Pei Cao, Jiu Hui Wu, Xu Chen, and Zhen Huang
发表/完成日期: 2018-03-18
期刊名称: Journal of Applied Physics
期卷: Vol. 123, No.13
相关文章: An approach to investigate the multiple-scattering problems based on the singularity expansion method.pdf   
论文简介
An approach to perform the multiple-scattering calculations of the two-cylinder acoustic scattering
problem is studied here. The coupling factors and the analytical solutions of the poles are extracted
by using the singularity expansion method (SEM). Through interpreting the coupling characteristic
of the external oscillations, the poles are also obtained which are consistent with the exact results. It
is noted that the coupling characteristic of the scattering field is the corresponding coupling between
the oscillation modes of the same order, as well as the SEM poles. Based on this, we then infer that
by interpreting the physical meaning of the coupling coefficients and explaining the influence of the
coupling characteristic on the SEM poles, the pole distributions and the external oscillation characteristics of multiple scatterers can be studied in acoustic scattering problems. The study is based on
general models, and then takes a two-same-cylinder model as an example for comparative analysis.
In addition, the relationship between the real parts of the SEM poles and the separated distance is
also analyzed briefly. The new approach and the related calculation results provide an effective way
to perform shape recognition in the acoustic scattering field.