基于ANSYS的布袋除尘器钢结构热应力分析

Thermal Stress Analysis of Steel Structure of Bag Precipitator by Using ANSIS

基于ANSYS软件建立了布袋除尘器钢结构的有限元模型。模拟了布袋除尘器的温度场分布,温度分布比较均匀,温差较小,均在370~410℃的范围内。在负压和正压工况下分别对模型进行了热应力计算和分析。计算结果表明,负压和正压工况下均有少数柱脚与基础脱离,但最大脱离位移仅有0.2 mm左右,脱离程度极小,在允许范围内。布袋除尘器箱体顶板处最大应力仅为78.9 MPa,远小于相应材料的屈服强度。为布袋除尘器钢结构的优化设计提供了理论依据。

By using ANSYS, the finite element model of steel structure of bag precipitator was established. The temperature field in bag precipitator was then simulated. The distribution in the temperature field is quite uniform and the difference in the field is small, which is within 370～410℃. Under positive and negative pressure conditions, thermal stress was calculated for the model. It was shown from the result that under both positive and negative pressure conditions, there were a few columns separated from foundation, but the maximum separation displacement was only 0.2 mm, which was quite small and within the allowable scope. The maximum stress in the top of bag was only 78.9 MPa, which was great lower than the yielding strength of the material. The analytical result has provided theoretical basis for the optimization of the steel structure of bag precipitator.