GAO Guang-yun, LI Zhi-yi, QIU Chang. Three-dimensional analysis of in-filled trench as barriers for isolating vibration in far field[J]. 2005, 26(8).DOI:
In-filled trench is equivalent to an obstacle in half-space when it was used for isolating vibration. Based on the integral equation of Rayleigh wave scattering
the paper studied the passive isolating vibration in far field by in-filled trench barrier in 3-D
and discussed some key factors affecting effectiveness of barriers. The results show that rigid material has a better effect than flexible one in isolating vibration
so the former should be selected as barrier material in engineering. The effect of isolating vibration is due to the depth and thickness of the trench. When the depth of barriers is more than a Rayleigh wave length
the effectiveness of isolating vibration increases for a little with the barrier depth increase.