柱・梁材の3次元直交交差部における固体音伝搬率計算図表の作成と伝搬性状の二三の考察 : 建築躯体における固体音伝搬性状の研究-第4報

概要

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In the part-1 of this research, theoretical and practical equations to calculate transmission coefficients on 2-dimensional intersecting structures for bending wave and longitudinal wave incidence, were shown. In the part-2, some 2-dimensional intersecting structure models were made and transmission properties were measured. In the part-3, calculations and experiments are expanded into the 3-dimensional intersecting beams. And considering with tortional wave, the sum of calculated transmission coefficients is proved to be 100 %. In this report : part-4, 15 nomographs to see energy reflection and transmission coefficients were made, for typical 3-dimensional intersecting beams (branch of 4-beams and 2-pillars), with normalized frequency (β^2) on incidence structure. 15 nomographs would be widely used, as for various intersection materials (E, γ), for various incident wave (Bz, By, L, T) and for various combination of branch dimension (n). Then in this report some general properties for wave transmission on intersecting beams were discussed.
社団法人日本建築学会の論文
1990-11-30