Abstract
Abstract
The article deals with experimental investigation of insertion loss estimation for a building elastic shielding vibration isolation system. Precision mechatronics production facility is located inside it with VC-D requirements for their foundation vibration level. A road with double tram lines lays 23 m off the exterior building’s walls producing reasonable vibration background noise. In order to reduce surface wave amplitudes elastic layer of Sylomer® polyurethane pads are glued to the underground exterior walls of the building. The vibration measurements were conducted before and after the elastic shield installation and the insertion loss was estimated using these results. Moreover, simultaneous dual channel analysis of vibration transfer through the wall structure was evaluated. Measured vibration isolation efficiency reaches 14 dB in octave band 31.5 Hz in vertical and from 9 to 15 dB in horizontal direction. For higher frequencies vibration isolation efficiency reduces due to wave effects in the isolators.