강제구조물의 고체음전달에 관한 실험적 연구

Abstract

최근에 선박이나 항공분야에서 복잡한 강구조물의 진동전달을 해석하기 위하여 통계적에너지 해석법(SEA)이 널리 이용되고 있다.

본 논문에서는 강구조물모델의 SEA법 적용의 정도를 확인하기위하여 백색잡음(white noise)을 실험모델의 기진원으로하여 실헙적 연구를 수행하였다. 모델을 구성하는 판넬의 내부손실계수를 정확히 평가하는 것이 SEA법 해석시 가장 중요함을 알 수 있었고, 계산된 결과는 실험치와 좋은 일치를 보여주었다.

강구조물모델에서 고체음전달감소에 내부손실계수가 미치는 영향을 실험적으로 명확하게 확인하였다.

Recently the SEA( Statistical Energy Analysis ) method has been used to estimate vibration transmission through complex structures of aircrafts and ships.

In this paper, experimental studies were carried out to investigate the application of the SEA method to a steel structure model. A vibration excitor system was used in the model and white noise power is supplied as a vibration source.

It is found that the reasonable evaluation of intemal loss factor of panels composing the model is the key to the analysis and the calculated results agreed well with the experimental results.

The effect of internal loss factor on the reduction of structure-borne sound levels in the model was experimentally investigated and clarified.

Recently the SEA( Statistical Energy Analysis ) method has been used to estimate vibration transmission through complex structures of aircrafts and ships.

In this paper, experimental studies were carried out to investigate the application of the SEA method to a steel structure model. A vibration excitor system was used in the model and white noise power is supplied as a vibration source.

It is found that the reasonable evaluation of intemal loss factor of panels composing the model is the key to the analysis and the calculated results agreed well with the experimental results.

The effect of internal loss factor on the reduction of structure-borne sound levels in the model was experimentally investigated and clarified.