基于梁带法的大型电站凝汽器管板刚度计算分析  

Stiffness-strength Calculation of Large Power Plant Condenser Tubesheet based on Beam-Strip Method

作　　者：陈小明[1] 赖喜德[1] 唐健[1] 徐志坚 

机构地区：[1]西华大学能源与动力工程学院,四川成都610039 [2]国电大渡河公司龚嘴水力发电总厂,四川乐山614000

出　　处：《热能动力工程》2016年第4期106-111,149-150,共6页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(51379179);流体及动力机械教育部重点实验室(西华大学)开放课题资助项目(szjj2015-038)

摘　　要：根据大型电站凝汽器管板刚度的计算需要,基于梁带法建立大型电站凝汽器管板梁带力学模型。通过在该力学模型端部添加等效弹簧来模拟钢梁对管板端部的刚性加强作用,并给出了端部弹簧刚度系数计算公式。采用矩阵位移法求解梁带力学模型,根据建模和求解过程开发大型电站凝汽器管板刚度计算专用软件。利用该软件分析管板厚度和端部钢梁对管板刚度计算结果的影响。结果表明:管板厚度和钢梁对管板刚度计算影响显著,增大管板厚度可显著减小管板最大应力,而增大端部钢梁等效弹簧刚度系数可显著减小冷却管、钢梁的最大变形。For the calculation need of condenser tubesheet of large power plant,a corresponding structural model was established based on beam-strip method. The effect of stiffness enhancement was simulated by adding equivalent spring at the end of structural model,and formulas of spring constant were put forward. The matrix displacement method was adopted to solve beam-strip structural model,and appropriative software was developed based on the model establishing and problem solving,and used to analyze the effects of tubesheet thickness and structural bar. It indicates that tubesheet thickness and structural bar have significant effect on the results. Enlarging tubesheet thickness can dramatically lower the maximum stress of tubesheet,while enlarging spring constant can dramatically lower the maximum deformation of tubesheet and structural bar.

关 键 词：凝汽器 管板 刚强度 力学模型 

分 类 号：TM621.7[电气工程—电力系统及自动化]