scholarly journals Study on composite electromagnetic scattering from the double rectangular cross-section columns above rough sea surface using hybrid method

2015 ◽  
Vol 64 (17) ◽  
pp. 174101
Author(s):  
Tian Wei ◽  
Ren Xin-Cheng ◽  
Guo Li-Xin
Keyword(s):  
Cross Section ◽  
Hybrid Method ◽  
Electromagnetic Scattering ◽  
Rectangular Cross Section ◽  
Sea Surface ◽  
Rough Sea Surface ◽  
Rough Sea

scholarly journals Modified PO–PO hybrid method for scattering of 2D ship model on the rough sea surface

2018 ◽  
Vol 13 (2) ◽  
pp. 156-162 ◽  
Author(s):  
Mahdi Behdani ◽  
Parisa Dehkhoda ◽  
Ahad Tavakoli ◽  
Mohammad Zoofaghari
Keyword(s):  
Hybrid Method ◽  
Sea Surface ◽  
Ship Model ◽  
Rough Sea Surface ◽  
Rough Sea

The Study on a New Approximate Method of Computing Electromagnetic Scattering from Multilayer Rough Sea Surfaces

2014 ◽  
Vol 533 ◽  
pp. 268-273
Author(s):  
Jia Sheng Tian ◽  
Wan Pan ◽  
Jian Shi
Keyword(s):  
Electromagnetic Scattering ◽  
Computation Time ◽  
Sea Surface ◽  
Analysis Method ◽  
Large Matrix ◽  
Random Rough Surfaces ◽  
Strong Winds ◽  
Rough Sea Surface ◽  
Rough Sea ◽  
Good Agreement

At high sea states strong winds make the sea surface broken, and become a multilayer-rough sea surface made of a large number of foams and droplets. Similarly, if the sea surface covered by oil and other dirts will also belong to the mutilayer rough sea surfaces of various medium properties. In this paper, applying the Kirchhoff Approximation (KA) and the electromagnetic theory of stratified media, electromagnetic scattering characteristics from a multilayer rough medium surface are calculated. Firstly, a detailed analysis of electromagnetic reflection from multilayer parallel interfaces under different incident angles is carried out. Secondly, combining the preceding two results and courses, electromagnetic scattering from the multilayer random rough surfaces is studied. The computed results are in good agreement with those by using the method of moments (MOM) and reported by some experts. Finally, the random rough sea surface covered by spilling oil or droplets and foams is calculated in detail. Compared with MOM, the new approximate analysis method in the paper can avoid a large matrix inversion, and thus greatly reduce the computation time and improve the computational efficiency.

scholarly journals Hybrid methods for composite scattering from conductive target above a rough surface

2018 ◽  
Vol 173 ◽  
pp. 02038
Author(s):  
Gui-Long Tian ◽  
Chuan-Ming Tong ◽  
Hao Liu ◽  
Zheng-Guo Long ◽  
Jian-Jun Wang
Keyword(s):  
Rough Surface ◽  
Hybrid Method ◽  
Hybrid Methods ◽  
Composite Model ◽  
Sea Surface ◽  
Method Of Moment ◽  
Rough Sea Surface ◽  
Rough Sea

A hybrid method combining the method of moment (MoM) and physical optical (PO) is used to compute the scattering from 3D conductive target above a rough sea surface in this paper. Firstly, the composite model of 3D conductive target above the sea surface is constructed. The rough sea surface is simulated by the Pierson-Moscowitz spectrum and Monte-Caro method. The target is divided into MoM region and the rough sea surface is divided into PO region. Then, the current on the facet of target is obtained by MoM method and the current on the facet of rough surface is obtained by PO approximation. Compared to the method of moment, the hybrid MoM-PO method proves to be high accurate and efficient. Finally, composite scattering under different condition are studied in detained.

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