埋地热油管道热应力计算及防护技术研究

发布时间：2018-06-20 17:43

本文选题：弯头 + 应力分析　；参考：《东北石油大学》2015年硕士论文

【摘要】：埋地热油管道由于弯头失效造成管道泄漏,反映出该管道的原始设计、施工、运行等方面可能存在薄弱环节,初步分析为管道弯头热应力过载影响所致。为使埋地热油管道安全稳定运行,应对管道进行全面系统的安全评估。通过对埋地热油管道温度场、弯头应力场建模,分析弯头角度、温度变化、流量、压力等因素的影响并建立有限元模型进行实例计算,分析得出引发弯头失效的主要影响因素,并据此开展室内弯头的破坏性实验,监测弯头的失效行为,对运用ANSYS建立的模型进行对比修正,运用该模型对高应力集中的弯头进行加固模拟验证、优化锚固墩的布防位置；针对输油管道运行温度的变化可能引起的低周疲劳问题进行了现场应力监测试验,得到了较为完整的监测数据,得出部分弯头确实存在低周疲劳引发失效的可能性。
[Abstract]:Because the buried hot oil pipeline elbow failure caused by pipeline leakage, reflects the original design of the pipeline construction, operation and other aspects of possible weaknesses, preliminary analysis for thermal stress caused by pipe bend force overload effect. The safe and stable operation of oil pipeline, a comprehensive security assessment system to deal with the road. Based on buried geothermal pipe Oil pipeline temperature field, stress field modeling of elbow, elbow angle, temperature, flow, pressure and other factors and a finite element model is established to calculate and analysis the main influence factors causing failure of the elbow, and then carry out indoor elbow destructive experiments, failure to monitor the behavior of the elbow, the use of ANSYS the establishment of the model Type contrast correction, using the model of the elbow high stress concentration reinforcement simulation, optimization of the deployment of the anchor position; the field stress monitoring test of low cycle fatigue and changes in the operating temperature of the pipeline caused by the monitoring data has been relatively complete, that part of the existence of low elbow The fatigue caused by the possibility of failure.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE973

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