A fast frequency domain boundary element method for transient elastodynamic analysis

被引：0

作者：

Rong, Junjie ^{[1
]}

You, Junfeng ^{[2
]}

Wen, Lihua ^{[1
]}

Xiao, Jinyou ^{[1
]}

机构：

[1] College of Astronautics, Northwestern Polytechnical University

[2] National Key Laboratory of Combustion, Flow and Thermo-Structure, The 41st Institute of the Forth Academy of CASC

来源：

Xiao, J. | 1600年 / Xi'an Jiaotong University卷 / 48期

关键词：

Boundary element method; Elastodynamics; Iterative method; Krylov subspace recycling;

D O I：

10.7652/xjtuxb201403021

中图分类号：

学科分类号：

摘要：

The conventional frequency-domain boundary element method (BEM) based on discrete Fourier transform is difficult to complete transient analysis of low damped and undamped systems. To solve this problem, the exponential window method is combined with the frequency-domain BEM, and the precorrected fast Fourier transform (pFFT) is used to accelerate the frequency-domain BEM analysis. For solving the sequence of linear systems corresponding to the sampling frequencies with higher efficiency, an extrapolation method is proposed to obtain good initial guesses. In addition, a newly developed Krylov subspace recycling method is employed to solve this sequence of linear systems. Numerical examples demonstrate a dramatic reduction of iterations, which leads to higher efficiency and smaller memory consuming.

引用

页码：115 / 120

页数：5

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