Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study of Acoustic Emission Parameters Involved in Burst Test for CNG-Vehicle Fuel Tank

자동차용 CNG 연료탱크의 파열시험시 발생하는 음향방출변수 분석

  • Received : 2011.05.03
  • Accepted : 2011.07.19
  • Published : 2011.09.01
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Abstract

This study is performed on the acoustic emission parameters involved in a burst test for a CNG-vehicle fuel tank. A resonant AE sensor with a central frequency of 150 kHz was attached on the composite materials in the center of the fuel tank. The analysis of AE parameters such as hit, amplitude, count, duration, risetime, and signal strength during load holding was performed. The total count and total signal strength are effective tools for the damage evaluation of a CNG fuel tank.

본 연구는 자동차용 CNG 연료탱크의 파열시험시 발생하는 음향방출변수의 분석에 관한 내용이다. 연료탱크의 복합재료 중앙부 표면에 150kHz 공진형 AE센서를 부착하여 파열시험시 발생하는 음향방출 신호를 획득하고, 가압유지시간 동안의 hit, amplitude, count, duration, risetime, signal strength 등과 같은 음향방출 변수들을 분석하였다. 음향방출 변수 중 total count, total signal strength가 연료탱크 손상정도를 평가하는데 유용한 변수임을 알 수 있었다.

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References

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