加螺旋筋的薄壁圆筒轴压屈曲分析及优化

Instability Analysis and Optimization Under the Axial-Press of Thin-Walled Pipes with Spiral Ribs

管道外壁加螺旋筋是提高管材结构强度,节约材料用量,减轻管材整体重量的主要方法。利用ansys workbench软件模拟该螺旋筋焊管在受到轴向载荷作用时的屈曲变形,分析各参数对管壳稳定性的影响,对各参数进行优化。结果表明,螺旋筋的螺距和壁厚是影响稳定性的主要参数,对一个模型的螺距、壁厚和临界失稳载荷三者的参数进行优化,得出螺距和壁厚的最佳组合。

With spiral stiffener being attached to its outer wall,gas drainage pipes can not only increase their strength ,but also reduce their weight,namely,the economy of materials. Utilizing Ansys Workbench,the optimization of the parameters is preceded by the simulation of the buckling deformation of the welded pipe undergoing the axial load and the analysis of the parameters＇ influence on the stability of shell. The analysis shed light on the primary parameters affecting stability called the pitch of spiral stiffened and wall thickness. After optimizing the pitch ,wall thickness and the critical buckling load parameters of a model,it gets the best combination of pitch and wall thickness.