内压作用下弯管的塑性极限载荷分析

PLASTIC LIMIT LOAD ANALYSIS OF ELBOWS UNDER THE INTERNAL PRESSURE

在变壁厚椭圆截面弯管应力分析的基础上,运用Tresca和von Mises屈服准则,对承受内压作用的钢制弯管进行了极限载荷分析,推导出考虑弯管截面壁厚变化和弯管椭圆度的变壁厚椭圆弯管的塑性极限压力计算式.弯管的极限载荷随着弯管的壁厚和弯管的椭圆度的不同而变化.

Based on a bending stress analysis of a bend pipe of elliptical cross section of variable wall thickness, with Tresca and von Mises yield criteria, the plastic limit pressure formula is derived with consideration of variable elbow wall thickness and variable elliptic degree. The limit load changes with the pipe wall thickness and the ovality of the elbow.