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A Vibration Test of Fuel Tanks for LNG Vehicles

액화천연가스 차량용 연료탱크의 진동시험

  • Received : 2015.11.05
  • Accepted : 2015.12.22
  • Published : 2015.12.31

Abstract

Natural frequencies of a cryogenic fuel tank of LNG vehicle were computed to check the safety related to the resonances, and tests were performed to confirm the vibrational durability of a cryogenic fuel tank. There were 3 tests. The first test started at excitation frequency of 31.9Hz, and the test was performed reducing the excitation frequencies. Failure took place at 22.1Hz. The second test was performed with the frequencies to be increased. At 12.7 Hz, failure took place and nitrogen gas was exhausted. In the third test, the excitation frequencies were continuously changed, and the vibration port was failed in the range between 8 Hz and 19.3 Hz. Detailed research on the failed parts of the tank in this study is recommended to enhance the safety of the cryogenic fuel tanks of LNG vehicles.

Keywords

LNG vehicle;cryogenic fuel tank;vibrational durability

References

  1. T.J. Cho, "A Study of Vibrational Analysis for the LNG Vehicle Fuel Tank", Master's Thesis, Dept. of Mechanical Engineering, Kyung Hee University, Korea, (2009)
  2. JeongOk Han and YongWon Lee, "Study on Adiabatic Performance of LNG Storage Tank for Vehicles", J. of KIGAS, Vol.12, No.1, pp31-35, (2008)
  3. Chung Kyun Kim and Seung Hyun Cho, "FE Analysis on the Design Safety of Inner Tank Bottom Plate in Terms of Cryogenic Temperature Loading", J. of KIGAS, Vol.8, No.3, pp8-15, (2004)
  4. KGS 2005-005 "Translations of International Standards related to LNG Vehicles", Korea Gas Safety Co., (2005)