摘要
在压力载荷与温度载荷的双重作用下,埋地热油管道极易发生爆管、泄漏等安全事故,在弯管处尤为突出。基于热-力耦合分析系统,对弯管的热应力进行仿真分析,通过改变内压载荷、介质温度及管外土壤环境来分析热应力的变化规律。结果表明:管道弯管热应力主要集中在外侧大弧面区;随着管道内压的增加,弯管的热应力及变形呈线性增长,增长系数分别为0.019和0.02%;随着管道内油流温度升高,弯管热应力与变形逐渐增大且热应力增加的幅度较大;随管外土壤温度升高,弯管热应力与变形均增加,但变形较为明显。
Under the dual effect of pressure load and temperature load, buried hot oil pipelines are prone to safety accidents such as tube explosion and leakage, which are particularly prominent at the bends. Based on the thermo-mechanical coupling analysis system, the thermal stress of the bent pipe was simulated and analyzed, and the change law of thermal stress was analyzed by changing the internal pressure load, medium temperature and soil environment outside the pipe. The results showed that the thermal stress of the pipe bend was mainly concentrated on the outer large arc surface area;as the internal pressure of the pipe increased, the thermal stress and deformation of the bend increased linearly, and the growth coefficients were 0.019 and 0.02%, respectively;As the temperature of the flow increased, the thermal stress and deformation of the bent pipe gradually increased, and the increase magnitude of the thermal stress was bigger;as the temperature of the soil outside the pipe increased, both the thermal stress and deformation of the bent pipe increased, but the deformation was more obvious.
作者
关义
王博
王卫强
GUAN Yi;WANG Bo;WANG Wei-qiang(Liaoning Huazheng Engineering Design Co.,Ltd.,Shenyang Liaoning 111000,China;School of Petroleum and Natural Gas Engineering,Liaoning Shihua University,Fushun Liaoning 113001,China)
出处
《当代化工》
CAS
2020年第8期1711-1714,1718,共5页
Contemporary Chemical Industry
基金
辽宁省自然科学基金指导计划(项目编号:2018001457)
关键词
埋地热油管道
弯管
热-力耦合
热应力
变形位移
Buried hot oil pipeline
Elbow
Thermal-mechanical coupling
Thermal stress
Deformation displacement
