复合结构壳体蠕变变形有限元研究

基于蠕变理论，采用有限元数值计算方法，用ANSYS作为计算平台，建立了壳体结构的蠕变变形计算模型．对由耐火材料是镁碳砖炉衬和炉壳组成的复合结构转炉，由于高导热率的镁碳砖广泛使用，引起转炉炉壳的温度升高，导致转炉不同程度地出现了炉壳蠕变变形，致使炉壳使用寿命缩短．研究转炉炉壳蠕变变形的状态及分布规律，可为控制炉壳蠕变变形、延长炉壳使用寿命提供依据．运用所述的有限元计算模型，对复合结构的转炉炉壳的蠕变变形行为进行模拟，模拟结果与现场测量值基本吻合．

FEM RESEARCH OF SHELL CREEP DEFORMATION FOR COMPOSITE STRUCTURE

Based on creep deformation theory, using finite element numerical calculating method with ANSYS commercial software as calculation platform, the creep deformation computational model for composite structure shell is established. For composite structure blast oxygen furnace (BOF) composed of magnesia-graphite refractory, due to the high thermal conductivity of magnesia-graphite refractory, a high temperature will appeared on the shell in the BOF. This results in shell creep deformation to a greater or lesser degree and reduces its service life. The BOF shell creep deformation is studied in this paper, the result provides some hints to control shell creep deformation and prolong shell service life. With the finite element computational model, the simulation results agree quite well with the spot measurements.