A Method of Analysis to Predict Sound Transmission Loss of an Extruded Aluminum Panel for Use on Railway Vehicles

철도차량용 알루미늄 압출재의 음향 투과손실 예측에 관한 연구

  • Kim, Kwanju (Department of Mechanical System Design Engineering, Hongik University) ;
  • Lee, Jun-Heon (Department of Mechanical Engineering, Hongik University) ;
  • Kim, Dae-Yong (Department of Mechanical Engineering, Hongik University) ;
  • Kim, Seock-Hyun (Department of Mechanical and Mechatronics Engineering, Kangwon National University)
  • Received : 2012.06.26
  • Accepted : 2012.12.18
  • Published : 2013.02.28


The frame elements of modern high speed trains are typically fabricated with extruded aluminum panels. However, the sound transmission loss (STL) of extruded aluminum panels is less satisfactory than flat panels with the same surface density. This study proposes a method for prediction of the sound transmission loss of extruded aluminum panels using finite element analysis. The panel is modeled by finite element analysis, and the STL is calculated using a measure of Sommerfeld radiation at the specimen surface, boundary conditions, and the internal loss factor of the material. In order to verify the validity of the predicted value, intensity transmission loss was measured on the aluminum specimen according to ASTM E2249-02. The proposed method of analysis will be utilized to predict the sound insulation performance of extruded aluminum panels for railway vehicles in the design stage, and to establish measures for their improvement.


Supported by : 한국연구재단


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