噪声与振动控制2011，Vol.31Issue(1)：145-148,4.DOI:10.3969/j.issn.1006-1355-2011.01.031
子结构FMBEM在消声器声场计算中的迭代收敛
Iterative Convergence of Substructure FMBEM in Sound Field Calculation of Silencer
摘要
Abstract
Substructure fast multipole boundary element method combines the fast multipole method, boundary element method and the substructure technology, so that the efficient and accurate calculation of acoustic problems for complex structures will be possible. However, for different models, the iterations become instable or even can not converge, and its application in practical engineering is directly limited. In view of this fact, the iterative convergence characteristics and influencing factors are analyzed for substructure FMBEM according to different plans of matrix composing and preconditioning. Studies show that in addition to taking the appropriate matrix preconditioning, the arrangement orders of unknown column vectors and the node numbers have an important influence on the convergence rate; the computation time per iteration step grows exponentially with the increasing of computation frequency. Finally, the transmission loss of the expansion chamber with extended inlet and outlet ducts is calculated as an example. The accuracy and validity of the method are confirmed by comparing the computation result with the experimental data.关键词
声学/声场计算/迭代收敛/子结构FMBEM/消声器/传递损失分类
通用工业技术引用本文复制引用
崔晓兵,季振林..子结构FMBEM在消声器声场计算中的迭代收敛[J].噪声与振动控制,2011,31(1):145-148,4.基金项目
国家自然科学基金项目(基金编号:10874034) （基金编号:10874034）
