Efficient wave scattering analysis for damaged cylindrical waveguides
Efficient wave scattering analysis for damaged cylindrical waveguides
复制标题
对损坏的圆柱形波导进行有效的波散射分析
DOI：
10.1016/j.jsv.2014.04.013
复制
发表时间：
2014
影响因子：
4.7
通讯作者：
Lothar
中科院分区：
文献类型：
--
作者：
Bischoff;Stefan;Schaal;Christoph;Lothar
本文讨论了有限截面波导中任意形状缺陷的散射效应。主要的课题是预测由入射波场引起的散射波场，以定位和表征损伤。数值方法涉及的边值问题的解决方案结合散射波场的分解方法。为了研究缺陷处的模式转换现象，建立了损伤波导段的边界元模型。基于弹性动力学边界积分方程和波导有限元法的边界元法的实施允许散射系数的数值有效计算。对于缺陷表征和模式灵敏度分析，考虑了各种类型的表面开口缺陷以及剪切断裂。圆柱形波导的数值结果，并进行了实验验证。
This paper addresses scattering effects at arbitrarily shaped defects in waveguides with finite cross-sections. The main subject is to predict scattered wavefields induced by an incident wavefield in order to localize and characterize damages. The numerical approach involves the solution of a boundary value problem in combination with a decomposition method of scattered wavefields. In order to investigate mode conversion phenomena at defects, a boundary element model of the damaged waveguide section is built up. Implementation of the Boundary Element Method based on the elastodynamic boundary integral equation and the Waveguide Finite Element Method allows for a numerically efficient calculation of scattering coefficients. For defect characterization and mode sensitivity analysis, various types of surface opening defects as well as shear fractures are considered. Numerical results are presented for cylindrical waveguides and are verified experimentally.
静态与动态随机元素方法
影响因子：
1.9
作者：
L. Gaul;C. Fiedler
通讯作者：
C. Fiedler
影响因子：
2.7
作者：
L. Gaul;H. Sprenger;C. Schaal;S. Bischoff
通讯作者：
L. Gaul;H. Sprenger;C. Schaal;S. Bischoff