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Indexed by:Journal Papers

Date of Publication:2019-11-01

Journal:Huagong Xuebao/CIESC Journal

Included Journals:EI、PKU

Volume:70

Issue:11

Page Number:4486-4496

ISSN No.:04381157

Abstract:Taking the large-capacity liquefied natural gas (LNG) gas cylinder as the research object, the variation of the resonance frequency under different filling amount and different cylinder length with these two parameters is analyzed. When the length of the cylinder is constant, as the filling amount increases, the resonance frequency of the cylinder gradually decreases. When the maximum allowable filling rate is 90% according to the standard, the first-order resonance frequency of the cylinder has been reduced to below 40 Hz allowed by the national standard. When used, it is easy to cause axial collapse of the cylinder liner to fail. When the filling rate is 90%, the resonance frequency of the cylinder also decreases with the increase of the length of the cylinder. When the length of the cylinder is 0.8 times of the original length, the resonance frequency of the cylinder is lower than 40 Hz. As the length increases, it will be further reduced, and the possibility of resonance will increase, which does not meet the national requirements for the resonance frequency of the vehicle cylinder. The above results showed that the evaluation of the internal medium filling ratio should be considered when evaluating the anti-vibration performance of the cylinder. It is recommended to use a cylinder with a maximum filling rate of 90% as a condition for determining whether the resonance frequency of the cylinder is up to standard. On the other hand, when increasing the volume of the cylinder to increase the volume of the liquid, it is necessary to pay attention to the problem that the resonance frequency decreases with the length of the cylinder to avoid structural vibration damage. ? All Right Reserved.