基于有限元方法的L型低温管道传热及强度分析

发布时间：2018-02-14 15:46

本文关键词： 低温管道绝热支撑有限元方法应力　出处：《低温与超导》2016年09期 　论文类型：期刊论文

【摘要】：为了研究HV-MLI低温管道各部件在复杂载荷作用下的强度,以某一型号水平-竖直走向的L型HV-MLI低温管道为例,建立了热-结构耦合分析有限元模型。计算得出各工况下的管道温度场分布,以及管道中内管、外管、热桥和绝热支撑上的应力分布情况。分析结果表明:管道的绝热设计满足使用要求,绝热支撑和热桥是外界热量漏入管道的主要途径;L型HV-MLI低温管道中内管与弯头的等效应力随内管内压的增加而增大。在实际使用过程中内管、外管、弯头、热桥等结构不易发生危险;层间剪应力过大是绝热支撑的主要破坏因素。
[Abstract]:In order to study the strength of the components of HV-MLI cryogenic pipeline under complex loads, the L-type HV-MLI cryogenic pipeline with horizontal and vertical strike is taken as an example. The finite element model of thermal-structural coupling analysis is established, and the temperature field distribution of pipeline under various working conditions is calculated, and the inner and outer pipes in the pipeline are obtained. Stress distribution on thermal bridges and adiabatic braces. The analysis results show that the adiabatic design of pipes meets the requirements of application. Adiabatic support and thermal bridge are the main ways for external heat leakage into the pipeline. The equivalent stress of inner pipe and elbow in L-type HV-MLI cryogenic pipeline increases with the increase of internal pressure. Structures such as hot bridges are not easy to be dangerous, and excessive interlayer shear stress is the main failure factor of adiabatic braces.
【作者单位】：兰州理工大学石油化工学院;甘肃蓝科石化高新装备股份有限公司;
【基金】：甘肃省科技重大专项“大型LNG贮罐研发”(1203GKDA001)资助
【分类号】：TK124

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