کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
279549 | 1430359 | 2008 | 17 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Multi-mode wave propagation in ribbed plates: Part I, wavenumber-space characteristics Multi-mode wave propagation in ribbed plates: Part I, wavenumber-space characteristics](/preview/png/279549.png)
This paper addresses the issue of energy propagation features in ribbed panels over a wide frequency range. First, a tool for estimating the wave propagation characteristics of one- and two-dimensional structures by k-space analysis is presented. This tool uses a concept of Inhomogeneous Wave Correlation with sparse measured or extracted data, and leads to the estimation of θ-dependent wavenumbers. Here, the method is employed with the sparse simulated and measured normal velocities of a set of ribbed panels and new insights into their k-space behavior are highlighted. Behavior is essentially characterized at low frequencies by structural orthotropy. Comparisons with homogenized data show very good agreement. At higher frequencies, a new behavior pattern is observed and explained both numerically and experimentally. This is a multi-modal waveguide type of propagation in a direction parallel to the ribs.
Journal: International Journal of Solids and Structures - Volume 45, Issue 5, 1 March 2008, Pages 1179–1195