走行車両により橋梁から放射される低周波空気振動の解析

概要

論文の詳細を見る
Test results on an actual bridge due to a moving truck are measured and analyzed in this paper. The spectrum analyses of the acceleration wave of the bridge vibration and the sound radiating from its surface are done and they are in a good agreement of the peak frequencies to each other. Dynamic response analysis of the bridge forced by a travelling vehicle, is handled by means of the folded plate theory, and lastly the SPL of the low frequency range is formulated from the particle velocity equation corresponding to bridge and moving vehicle system. The envelope curve of the peak of theoretical SPL values may have a good agreement to the experimental ones. In the numerical calculation, the power spectrum density of the sound and the distributions of the sound in the crosswise direction of the bridge, truss bridge and box girder bridge, are obtained. The power spectrum density of the sound obtained by the effective elementary beam theory are compared with the one given by the folded plate theory and they have a good agreement in the low frequency range.
社団法人日本音響学会の論文
1982-12-25