Temperature field analysis of liquid stratification for LNG tank based on orthogonal ridgelet finite element method

摘要

Temperature change of liquid stratification for LNG tank is more complex; therefore, it is necessary to carry out temperature field analysis of liquid stratification for LNG tank, and the orthogonal ridgelet finite element method is constructed by combining the traditional finite element method and orthogonal ridgelet transformation. Firstly, the basic characteristics of orthogonal ridgelet transform are studied. Secondly, the theory models of liquid stratification of LNG tank are studied. Thirdly, the temperature field analysis model of liquid stratification orthogonal ridgelet finite element for LNG tank is constructed. Finally, the temperature field analysis of liquid stratification of LNG tank is carried out, and the temperature changing rules of liquid stratification for LNG tank are obtained based on the traditional finite element method, B-spline wavelet finite element method, orthogonal ridgelet finite element method, and field test, and comparison of results shows that the orthogonal ridgelet finite element method has highest computing precision and efficiency. In addition, the effect of leakage heat intensity on time of rolling caused by liquid stratification of LNG tank is obtained.