Abstract
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.
