철도차량용 압출판재의 고주파수 대역 음향 투과손실 수치해석

다국어 초록 (Multilingual Abstract)

Aluminium extruded panels are widely used for railway vehicles to make them lighter and stronger. Therefore, to predict the interior noise from train carriages, it is essential to investigate the vibro-acoustic behaviour of aluminium extruded panels. The numerical method which is called the wavenumber domain finite element and boundary element methods is applied in this study because the conventional finite element and boundary element methods are not efficient to predict the acoustic performance at high frequencies. By using this numerical method, the damping loss factor of the extruded panel will be found, comparing the numerical results with measurement conducted by finite length. Lastly, variation of sound transmission loss through the infinite length extruded panel will be investigated depending on the boundary conditions at the end of the panel.

참고문헌 (Reference)

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