Basic Research for Noise Reduction of Automatic WaterSupply Equipment

摘要

Many buildings and apartments have water supply equipment. Most of them are settled just in a automatic water supply equipment along the corridor not in the pump room. In these cases, it is very important to make their noise and vibration lower. The sound isolation cover is ordinary used for noise reduction, but it is not enough to reduce both of noise andvibration. In this research, through experiment and structural-acoustic coupled analysis, the main excitation source and radiation sound source are identified. Then the propagation path of sound and vibration are also clarified. From these results, an approach based on structuralacoustic coupled analysis for reducing noise and vibration is proposed through both experiment and analysis. Specifically, the natural frequencies and modes, vibration and radiation sound of each component and internal sound pressure distribution of water supply equipment was measured. An optimal arrangement of the sound insulation/ absorptive material was calculated by the numerical analysis.