Analysis of wave propagation in cylindrical pipes with local inhomogeneities
Analysis of wave propagation in cylindrical pipes with local inhomogeneities
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DOI：
10.1016/j.jsv.2008.05.039
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发表时间：
2009-01
影响因子：
4.7
通讯作者：
Zhou Wenjin;M. Ichchou;Jean-Mathieu Mencik
中科院分区：
文献类型：
--
作者：
Zhou Wenjin;M. Ichchou;Jean-Mathieu Mencik
本文提出了一种研究导弹性波在具有局部非均匀性的圆柱管内传播的数值方法。采用混合波有限元和有限元技术，充分利用现有的有限元程序，研究了管道中的频散和波散射问题。采用动态约简技术提高了计算效率，特别适用于具有标准局部特征的管道。数值算例表明，该方法为计算色散关系和散射场提供了一种有效的方法。同时考虑了轴对称和非轴对称波散射问题。
In this paper, we present a numerical approach to study the guided elastic wave propagation in cylindrical pipes with local inhomogeneities. A hybrid wave finite element (WFE) and finite element (FE) technique is introduced to investigate the dispersion and wave scattering in pipes by taking full advantage of the existing FE codes. Dynamic reduction technique is employed to improve the computational efficiency, which is particularly suitable for the pipes with standard local features. Numerical examples indicate that the proposed technique provides an effective way to calculate the dispersion relationship and the scattered field. Both the axisymmetric and non-axisymmetric wave scattering problems are considered.