消声器传递损失预测的边界元数值配点混合方法

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (2) : 153-157.

论文

杨亮 1，季振林 1，T.W.Wu 2

作者信息 +

Transmission loss prediction of silencers by using combined boundary element method and numerical collocation approach

YANG Liang1，JI Zhen-lin1，WU T.W.2

Author information +

文章历史 +

摘要

将边界元法与数值配点法结合形成混合方法用于计算任意截面形状消声器的传递损失。消声器划分为若干子结构，用边界元法计算具有非规则形状的子结构阻抗矩阵，用二维有限元法提取等截面子结构特征值及特征向量，用配点法获得阻抗矩阵；将每个子结构阻抗矩阵连接用于传递损失计算。为减少计算时间提出简化方法计算消声器传递损失。结果表明，混合法在保证计算精度前提下可节省计算时间。

Abstract

A technique combining the boundary element method (BEM) and numerical collocation approach is proposed to calculate the transmission loss of silencers with arbitrary cross-section. The silencer is divided into several substructures. The BEM and the numerical collocation approach are employed to evaluate the impedance matrices of substructures with any-shaped cross-section and uniform cross-section along axial direction, respectively, and then the matrices for all substructures are related. The transmission loss predictions of several silencers agree well with BEM. The computational efficiency is analyzed and compared with traditional substructure method. The combined technique may save computational time efficiently.

导出引用

杨亮 1，季振林 1，T.W.Wu 2. 消声器传递损失预测的边界元数值配点混合方法[J]. 振动与冲击, 2016, 35(2): 153-157

YANG Liang1，JI Zhen-lin1，WU T.W.2. Transmission loss prediction of silencers by using combined boundary element method and numerical collocation approach[J]. Journal of Vibration and Shock, 2016, 35(2): 153-157

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