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CSME 2023/06
Volume 44 No.3
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287-293
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Temperature Stratification Failure Mechanism of LNG Tank Based on Complex Contourlet Finite Element Method
Bin Zhaoa, Haiyang Lia, Diankui Gaoa and Lizhi Xua
aSchool of Mechanical Engineering, Liaoning Petrochemical University, Fushun, Liaoning Taiwan 113001, China.
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Abstract:
main security problem of LNG tank, to enhance computation accuracy and efficiency of temperature stratification failure of LNG tank, complex Contourlet finite element model is established by combing complex Contourlet transform and finite element method. Firstly, theory model of temperature stratification failure of LNG tank is constructed, Secondly, complex Contourlet finite element model is confirmed, and mathematical model is deduced. Finally, temperature stratification simulation analysis is carried out, temperature stratification of LNG tank is analyzed based on B-spline finite element model and proposed complex Contourlet finite element model, comparison between simulation results and existing testing results illustrate that proposed complex Contourlet finite element model has higher computation accuracy precision and efficiency. Stratification degree changing laws of LNG tank are obtained, and effect rules of heat leakage on temperature stratification failure are also obtained.
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Keywords: temperature stratification, failure, LNG tank, complex Contourlet finite element model.
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*Corresponding author; e-mail:
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©
2023
CSME , ISSN 0257-9731
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