热-结构耦合的高炉炉壳静强度及疲劳强度分析

通过工程传热分析计算出冷却模块内冷却水与水管内壁的对流换热系数以及炉壳外表面的综合换热系数,并根据还原炉的工作流程,确定了3种载荷工况;然后借助大型通用有限元分析软件ANSYS,采用热-结构耦合的方法计算了高温状态下炉壳的温度分布、热-结构耦合应力场。模拟计算结果表明,在工况载荷作用下,炉壳各部位最大Von mises应力均远远小于材料的屈服极限,炉壳静强度满足要求。对各节点按Goodman-Smith疲劳极限图进行疲劳评定,炉壳的疲劳强度也满足要求。

Strength analysis of new-style blast furnace based on the thermal-structural coupling

In order to design the reduction furnace reasonably,the heat convection coefficient between the cooling water and the water pipe in the cooling module,and the comprehensive heat transfer coefficient of the exterior furnace shell were calculated using engineering heat transfer analysis.Based on the workflow of a reduction furnace,three work conditions were defined.Using finite element software ANSYS,the furnace shell temperature field and the thermal-structure coupled stress field in high temperature working conditions were calculated using a thermal-structure coupled method.The result indicates that the maximum Von mises stress of each region of the furnace shell is significantly less than the yield limit of the material under the workload.The static strength of the furnace shell satisfies the practical requirements.The Goodman-Smith fatigue limit figure was used to evaluate each node.It was found that the fatigue strength also meets the corresponding requirements.