摘要
针对管子与管板以胀接和焊接形式连接的管板结构,采用有限元方法计算了在壳程压力作用下的挠度和应力,并拟合为管板半径、厚度和压力的函数。结果表明:由于管子的支撑作用,管板的挠度和应力对管板的半径和厚度的变化并不十分敏感;有限元分析得到的管板应力不足按常规设计标准计算所得管板应力的一半,这表明,虽然在换热器设计标准中管板的设计计算考虑了管子的一定支撑作用,但实际的支撑效果更大,若采用基于有限元法的分析设计法,仍然可以降低换热器的管板厚度;与焊接结构相比,胀接结构更有利于提升开孔管板的强度与刚度。
Finite element analysis models have been established to simulate a tubesheet connected to tubes by expansion or welding methods.Stress and deformation in the tubesheet produced by shell side pressure load were calculated and regressed into functions of the tubesheet radius,thickness and the pressure.The results showed that owing to the tube supports,the deflection and stress at the tubesheet are not as sensitive to the radius and thickness of the tubesheet as predicted by the plate theory.In terms of increasing the strength and stiffness of the perforated tubesheet,the expansion method is preferable to the welding method for connecting the tubes to the tubesheet.By using analysis models based on finite element analysis to design heat exchangers,the tubesheet thickness can be significantly reduced.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期125-129,共5页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
北京市自然科学基金(3002009)
关键词
管板设计
有限元分析
应力
挠度
tubesheet design
finite element analysis
stress
deformation
