The result shows that under the action of the internal pressure, the maximum value of the hoop stresses are in the inner sides of the ends of major axis of ellipse,and are the crack source poin.

• 利用有限元方法和经验公式求出了整体锅炉管道在内压和温度作用下的变形及各截面上的弯矩,重点分析了椭圆形截面管上各点的环向应力。