CAJ | 학술논문

　　介绍了LNG管道保冷结构以及外表面温度法计算保冷层厚度，应用有限元分析软件对LNG低温长输管道算例进行了稳态温度场及热应力场分布模拟计算。计算结果表明：管道和保冷层交界面部位热应力达到最大值，随着保冷层半径的增加热应力逐渐减小。
　　개소료LNG관도보랭결구이급외표면온도법계산보랭층후도，응용유한원분석연건대LNG저온장수관도산례진행료은태온도장급열응력장분포모의계산。계산결과표명：관도화보랭층교계면부위열응력체도최대치，수착보랭층반경적증가열응력축점감소。
The insulation structure of LNG pipeline was introduced as well as calculation of insulating layer thickness by surface temperature method. The finite analysis software was used to calculate static temperature distribution and thermal stress distribution of LNG cryogenic long-distance pipeline. Calculation results show that: the maximal thermal stress happens at the interface of the pipeline and insulation;the thermal stress decreases with increase of the insulation radius.