4톤급 지게차 소음 분석 및 저감에 대한 연구

초록

This study is an example of each improvement activity of driver noise and soundpower for a 4 ton class forklift. To reduce the noise power of the forklift, it is necessary to reduce the noise of the cooling fan. Noise analysis was carried out by applying the optimal design of the cooling fan to simulate nature and applying the eagle wing airfoil. An analysis of noise reduction was conducted through the experimental results mounted on an actual forklift. In order to reduce driver noise, a sound absorbing and insulating material was attached inside the cabin to reduce engine radiation noise. Acoustic BEM analysis and acoustic camera equipment were used to understand the effects on sound absorbing and insulating materials.