Proceedings of the KSR Conference (한국철도학회:학술대회논문집)
- 2010.06a
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- Pages.996-999
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- 2010
Design of Aluminium Extruded Panel for Sound Insulation
알미늄 압출재의 차음 구조 설계
Abstract
Aluminium extruded panel is the most important element for sound insulation in a express train. However, comparing with the flat plate with the same weight, the extruded panel shows remarkably low sound transmission loss above the 1st local resonance frequency, which is determined by the dimension of the core structure. Preceding study showed the possibility of the improvement of sound insulation performance by properly designing the core dimension. By the proper core design, local resonance frequency shifts to higher frequency region without any reduction of bending or torsional strength and without any weight increase. Based upon this result, this study investigates in detail the design modification of the core structure of the aluminium extruded panel used in a express train under development, in aspect of sound insulation. Design result is compared with those of other developed models.
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