An efficient computational procedure for random vibro-acoustic simulations

被引:7
|
作者
Coyette, Jean-Pierre [2 ]
Meerbergen, Karl [1 ]
机构
[1] Katholieke Univ Leuven, Dept Comp Sci, B-3001 Heverlee, Belgium
[2] Free Field Technol, B-1435 Mt Saint Guibert, Belgium
关键词
D O I
10.1016/j.jsv.2007.07.068
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
We discuss a new method for handling random acoustic excitations in finite-element models. The idea is to approximate the cross power spectral density matrix of the response by a low rank matrix. We illustrate the low rank approximation can be computed efficiently by the implicitly restarted block Lanczos method. The novelty lies in applying the Lanczos method to the cross power spectral density matrix of the response rather than the excitation. We give a theoretical explanation for finite-element models with modal damping. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:448 / 458
页数:11
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