基于ANSYS的埋地热油管道弯管附近应力失效研究

Study of Strength Failure Occurred around Bend in Buried Hot Oil Pipeline

研究了埋地热油管道在结构-热耦合应力作用下失效原因及锚固墩位置对其应力的影响。采用ANSYS对埋地热油管道进行应力模拟计算,得出在结构-热耦合应力作用下管道弯管处当量应力分布情况,并对不同角度的弯管进行结构-热耦合应力对比分析,得出不同角度弯管位置的应力数值,绘制变化曲线。同时改变弯管附近锚固墩位置,计算得出弯管处应力变化云图。结果显示,弯管处的最大当量应力随着角度的增加而逐渐减小,且调整锚固墩位置可进一步消减管道处最大当量应力,为防止埋地热油管道泄漏事故发生提供理论依据。

In this paper, the failure cause of buried hot oil pipeline under the action of coupled structural and thermal stresses and the effect of anchor pier location to the stress were studied. By using ANSYS, the stresses in buried hot oil pipeline were calculated, and the equivalent stress distribution under structural-thermal action was found. The structural-thermal coupling stresses in various angled bends were analyzed and compared. From the stresses in various angled bends, stress curves were drawn. By changing anchor pier location adjacent to bends, the stress nephogram was obtained from calculation. It was shown in the results that the maximum equivalent stress in bend will gradually reduce with the increase of the angle, and by adjusting anchor pier location may decrease the maximum equivalent stress further. What presented in this paper provided the theoretical basis for protecting the leak accident occurred in buried hot oil pipeline.