氨合成塔裙座支撑区热应力的有限元分析

Finite element analysis of thermal stress in the skirt support area of ammonia synthetic tower

利用ANSYS Workbench软件对氨合成塔裙座支撑区进行热应力有限元研究,分析比较了物料温度、内压对裙座支撑区热应力的影响。结果表明:对于Q235结构钢,当物料温度不变时,内压越高,裙座支撑区热应力水平越高,越容易引发热应力疲劳,导致一定的变形;内压不变时,物料温度升高,裙座支撑区的热应力水平也在升高,且越容易变形。对Q235和16Mn两种结构钢的热应力分布进行了分析比较,在内压及温度相同时,Q235钢能更好地避免筒体与裙座连接处热应力的集中,减少热疲劳应力,更适用于作为筒体与裙座的制造材料。

The thermal stress of the skirt support area of amnlonia synthetic tower is analyzed using the ANSYS Workbench software, and the effect of material temperature and internal pressure on thermal stress in the skirt support area is analyzed and compared. The results show that for Q235 structural steel, when the material temperature is invariable, the higher the internal pressure, the higher the thermal stress level of the skirt support area, the more prone to heat stress fatigue, resulting in a certain deformation. When the internal pressure is invariable, the temperature rises, the thermal stress level of the skirt supporting area is also increasing, and the more easily deformed. The stress distribution of Q235 and 16 Mn structural steel is analyzed and compared, and the results show that when tile pressure and tile temperature are the same, Q235 steel can better avoid the concentration of thermal stress at the joint of cylinder and skirt, reduce the thermal fatigue stress, and it is more suitable for manufacturing materials as cylinder and skirt.