换热器管板有限元分析模型研究

建立3种换热器管板有限元分析的简化模型:当量实心板与杆单元模型(模型A);实体管板与杆单元模型(模型B);实体管板与壳单元模型(模型C),通过典型算例,将3种简化模型的计算结果与全实体模型(模型D)进行对比分析。结果表明,模型C管板的应力强度、轴向位移及管束轴向力均与实体模型D较为接近,且得到保守结果,计算精度及效率优势较为明显。

Study on finite element analysis model of tube sheet for heat exchange

The numerical analysis study on tube sheet structure of heat exchange has been an active domain of academics and engineering.In this paper,three kinds of simplified model for finite element analysis of tube sheet were founded: The non-porous equivalent solid sheet with bar element model(model A),the solid tube sheet with bar element model(model B) and the solid tube sheet with shell element model(model C).The results of three simplified models were compared with those of entire entity model(model D).It shows that model C is relatively close to model D in terms of stress intensity,axial displacement of tube sheet and tube axial force,the conservative solution is also obtained.The accuracy and efficiency of model C were satisfactory.The results in the paper provide the basis for the discussion of comparatively accurate FEA model for tubesheet.