摘要
为了解决基于多层快速多极子方法的近场稀疏近似逆预条件对于某些开放结构电磁散射问题难以收敛的问题,将稀疏近似逆预条件结合谱预条件形成多步谱预条件技术。通过对复杂模型结构电磁散射特性进行分析,多步谱预条件技术相比于稀疏近似逆预条件技术,计算时间缩短,验证了该预条件技术的有效性。
To solve the problem that the sparse approximate inverse（ SAI） preconditioner based on multilevel fast multipole method can＇t convergent for some electromagnetic scattering of open complex structures,the multi-step spectral preconditioning method is proposed by combining the SAI preconditioner with the spectral preconditioner. The analysis of electromagnetic scattering characteristics of complex model structures shows that the calculation time of the multi-step spectral preconditioner is less than that of the SAI preconditioner. The correctness and effectiveness of the proposed preconditioner are verified.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2015年第6期727-732,共6页
Journal of Nanjing University of Science and Technology
基金
国家自然科学基金(61171041)
江苏省自然科学基金(BK2012034)
关键词
多层快速多极子方法
并行稀疏近似逆预条件
多步谱预条件
电磁散射
multilevel fast multipole method
parallel sparse approximate inverse preconditioner
multi-step spectral preconditioner
electromagnetic scattering
