摘要
基于现场管道形式利用ANSYS APDL构建多类约束参数化LNG接收站管道预冷分析模型,结合多点温度插值策略模拟接收站管道动态温度的分布和时变情况。以膨胀弯管道为例进行预冷仿真分析,探讨预冷过程中膨胀弯在不同支架约束下的应力、位移变化。由应力分析可知,导向约束以及膨胀弯中心附近约束的等效应力较大;由位移分析可知,膨胀弯可大大减少预冷过程中温差对管道结构的影响,膨胀弯轴向管段均产生较大的水平位移(垂直于管道轴向方向),在预冷过程中应注意膨胀弯管道各支撑处受力情况,预冷过程中未出现管道与支撑结构间的架空现象。
Based on the on-site pipeline form,ANSYS APDL was used to build a multi-class constraint parameterized analysis model for pre-cooling pipeline in LNG terminal.Combined with the multi-point temperature interpolation strategy,the dynamic temperature distribution and time-varying situation of the pipeline in the terminal were simulated.Taking the expansion bend pipe as an example,the pre-cooling simulation analysis was carried out to explore the changes of stress and displacement of expansion bend under the constraint of different supports during the pre-cooling process.From the stress analysis,it can be seen that the equivalent stress at the guiding constraint and the constraint near the center of the expansion bend is greater.The displacement analysis shows that the expansion bend can greatly reduce the influence of the temperature difference on the pipeline structure during the pre-cooling process.The axial pipe section of the expansion bend produces a large horizontal displacement(perpendicular to the axial direction of the pipe).Attention should be paid to the stress at each support of the expansion bend pipe during the pre-cooling process.There is no overhead phenomenon between the pipeline and the support structure during the pre-cooling process.
出处
《煤气与热力》
2022年第4期V0018-V0023,共6页
Gas & Heat
