Establishing a multi-wrap model is a quite ordinary engineering process in the industrial fields in the way that geophysics exploration and supplement manufacturing science. The excitation of various types of sources in such a model can create diversified wave ways under the guidance of wave procreation mechanisms. A deep argument on the characteristics of these wave modes can help us amend the scale and shape of the model to make it better hold right to the industrial result. We extend the Real Axis Integration (RAI) order and improve the Staggered Grid Scheme of the Finite Difference Time Domain (FDTD) method to examine the wave modes upset by the ring-beginning and the azimuthally-orthogonal-point-beginnings with low and extreme center frequencies in a distinctive multi-layered tubular model. We simulate two together types of source excitation plans using two together of the RAI method and the FDTD design accurately and capably. Mutual comparison on the two posing methods guarantees the validity and dependability of our theoretical analysis and shaping results. The modeling results display that the ring-beginning can only excite wave ways of certain orders. The azimuthally-orthogonal-point-beginnings can excite clean monopole or multipole wave modes only at the lower repetitions, but at higher recurrences, they might further excite wave styles of higher orders accompanying significant size. These modeling results concede possibility guide the design of measurement tools or production molds, and provide an essential action for the further analysis on the design problems accompanying anisotropic materials and/or eccentric cylindrical environments.
Author(s) Details:
Zhang Kuo,
China
Center for Information Industry Development, Beijing, China and Beijing CCID
Publishing & Media Co. Ltd., Beijing, China.
Please see the link here: https://stm.bookpi.org/FRAPS-V7/article/view/11157
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