2022-08-08T03:41:03Zhttps://niigata-u.repo.nii.ac.jp/oaioai:niigata-u.repo.nii.ac.jp:000028352021-03-01T20:23:42Z半無限周期構造を対象とした表面波モード解析手法の改善半無限周期構造を対象とした表面波モード解析手法の改善An Enhancement of Surface Wave analysis Method for Periodic Half-Planes阿部, 和久笠原, 祐樹紅露, 一寛公益社団法人土木学会surface waveperiodic structuretransfer matrixA numerical method is presented for the surface wave analysis of half-plane having a periodic structure. In order to grope out the dispersion curves of surface waves over a wide region, an improvement in the computational efficiency is attempted. This is realized by employing a transfer matrix for nodal vectors between the lower and the upper boundaries of a unit cell. Waves transmitting in the half-plane toward the far field are composed of eigenvectors of the transfer matrix. Exploration of the surface wave modes in a wavenumber-frequency domain can be reduced to an eigenvalue problem of a matrix consisted of the above eigenvectors. A numerical procedure to calculate the wave motion of surface wave modes is also constructed. The developed method is applied to the dispersion analysis of periodic half-planes. The validity of the proposed method is proved through those analyses, and characteristics of the dispersion curves and the wave motion are discussed.土木学会2009-08jpnjournal articlehttp://hdl.handle.net/10191/26507https://niigata-u.repo.nii.ac.jp/records/2835AA1249202113459139応用力学論文集応用力学論文集1210131020https://niigata-u.repo.nii.ac.jp/record/2835/files/12_1013-1020.pdfapplication/pdf827.0 kB2019-07-30