Damping Characterization of the Double-skin Aluminum Extruded Panels for Rolling Stock Carbody
철도차량 차체용 더블 스킨 알루미늄 압출 패널의 감쇠특성

Gil-Hyun Kang, Chul-Su Kim
2013 Journal of the Korea Academia-Industrial cooperation Society  
When car builder designs the large carbody structure of railway vehicles, it is necessary to optimize the damping characteristics through the analysis of structure borne noise such as sound pressure leve(SPL).This paper is a study on the structure borne noise analysis by characterizing the damping of double skin aluminum extruded panels for rolling stock carbody. The normalized SPL was calculated based on the simple source theory using measured mechanical mobility parameters from vibration
more » ... from vibration tests(i.e. point, transfer and modal mobility). The reduced SPL was predicted by using finite element method by applying loss factor of damping material into laminated shell elements. It was found out that the damping material coated on the panels like underframe, which part is seriously affected by vibration during train run, took effect to reduce noise level.
doi:10.5762/kais.2013.14.7.3197 fatcat:ti6aw4h5a5hptgd3engz4zzxg4