圆弧过渡段转角半径对挠性薄管板应力场影响的有限元分析  

FINITE ELEMENT ANALYSIS ON THE EFFECTS OF CORNER RADIUS OF ARC TRANSITION SECTION ON THE STRESS FIELD OF FLEXIBLE THIN TUBE SHEET

作　　者：叶增荣 Ye Zengrong(Nanjing Jinling Petrochemical Engineering Co.,Ltd.,Nanjing,Jiangsu,210042)

机构地区：[1]南京金凌石化工程设计有限公司,江苏南京210042

出　　处：《石油化工设备技术》2022年第2期9-15,I0001,共8页Petrochemical Equipment Technology

摘　　要：对某余热锅炉的挠性薄管板,建立了包含不同圆弧过渡段转角半径的有限元模型,分析了挠性薄管板的温度场分布及管板不同路径处的温度变化规律。结果表明:挠性薄管板的温度分布与厚管板存在明显的差异,挠性薄管板各部位沿轴向的温度变化均呈线性趋势,而沿径向方向的温度变化则呈梯度下降的趋势。此外,在Ps工况和Ps+ΔT工况下对包含不同转角半径的挠性薄管板模型进行了应力场分析,结果表明:转角半径的增大有利于改善挠性薄管板周边圆弧过渡段处及非布管区的受力状况,但在Ps+ΔT工况下,管板布管区的应力及换热管轴向应力明显升高。For the flexible thin tube sheet of one waste heat boiler,finite element analysis models including different arc radius of transition section are established.The temperature field distribution and the temperature change law at different paths of flexible thin tube sheet are analyzed.The results indicate that the temperature distribution of the flexible thin tube sheet is obviously different from that of the thick tube sheet.For the flexible thin tube sheet,the temperature along the axial direction is linearly distributed,but the temperature along the radial direction shows a gradient decreasing trend.In addition,different models of the flexible thin tube sheet with different corner radius are analyzed under P s and P s+ΔT calculation conditions.The results show that with the increase of corner radius,the stress conditions at the arc transition section and the non-pipe layout area are improved obviously,but under P s+ΔT calculation conditions,the stress at the tube layout area and the axial stress of heat exchange tube is increased significantly.

关 键 词：余热锅炉 挠性薄管板 圆弧过渡段 转角半径 有限元分析 

分 类 号：G63[文化科学—教育学]