高压预冷器管板变形原因分析
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摘要
针对水压试验后管板产生明显变形的高压预冷器,将换热管简化为非线性弹簧单元,通过基于大变形的几何非线性分析方法进行数值模拟,计算出换热管在含接触约束下的非线性失稳载荷,计算结果与水压实测变形数据吻合良好,从而得出换热管在管程试压阶段出现失稳是管板变形的主要原因的结论;并对管板已变形的高压预冷器,在设计工况下进行安全性评估,满足规范要求。研究成果对于优化高压薄管板预冷器设计,具有较好的指导和借鉴作用。
Considering obvious deformation of the tubesheet of the high pressure precooler after hydraulic test,the heat exchange tube was simplified as nonlinear spring element and was numerically simulated by the geometric nonlinear analysis method based on large deformation,the nonlinear buckling load of the heat exchange tube under contact constraints was calculated. The calculation results were in good agreement with the deformation data measured in the hydraulic test,and thereby it was concluded that the buckling of the heat exchange tube in the hydraulic test stage was the main cause of the tubesheet deformation. In addition,the safety of the high pressure precooler with deformed tubesheet was assessed under the design conditions,and it met the requirements of the code. The research results provide better guidance and reference for design optimization of high pressure thin tubesheet precooler.
Considering obvious deformation of the tubesheet of the high pressure precooler after hydraulic test,the heat exchange tube was simplified as nonlinear spring element and was numerically simulated by the geometric nonlinear analysis method based on large deformation,the nonlinear buckling load of the heat exchange tube under contact constraints was calculated. The calculation results were in good agreement with the deformation data measured in the hydraulic test,and thereby it was concluded that the buckling of the heat exchange tube in the hydraulic test stage was the main cause of the tubesheet deformation. In addition,the safety of the high pressure precooler with deformed tubesheet was assessed under the design conditions,and it met the requirements of the code. The research results provide better guidance and reference for design optimization of high pressure thin tubesheet precooler.
引文
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[15]郭崇志,陈文昕,纪昌盛.大型薄壁压力容器Shell51单元模型的应力线性化分析[J].化工机械,2005,32(5):275-278.
[2]雒定明,唐昕.高压预冷器2205异种钢焊接制造工艺技术探讨[J].压力容器,2010,27(8):24-27.
[3]薛明德,徐锋,李世玉.管壳式换热器换热管稳定性问题研究[J].压力容器,2007,24(3):8-11.
[4]范海峰,刘来福.薄管板预冷器的设计[J].天然气与石油,2007,25(5):45-48.
[5]陈永东,程沛,于改革,等.节能型换热设备与流程的一体化创新[J].流体机械,2018,46(10):15-21.
[6]孙志刚,杨湖.固定管板换热器N型管箱应力评定方法[J].压力容器,2018,35(11):47-52.
[7]林建华,林晓平,陈杰峰,等.高温导热油旋转接头失效案例及技术分析[J].包装与食品机械,2018,36(3):69-72.
[8]张平亮.换热器薄管板的设计计算[J].石油化工设备技术,2008,29(5):43-45.
[9]匡良明.薄管板换热器的结构形式与强度设计[J].石油化工设备,1997,26(3):25-28.
[10]马永其,陈罕.薄管板结构强度计算的新思路[J].化工机械,2002,29(1):49-53.
[11]阮鑫,李保健.大型换热器管与管板连接工艺的优化[J].石化技术,2005,12(1):37-39.
[12]王丹,董其伍,刘敏珊.管壳式换热器壳程特性数值模拟[J].南京工业大学学报,2009,31(5):52-57.
[13]陈学玲.应用ANSYS实现几何非线性分析方法[J].科学之友,2011(2):134-135.
[14]龚明明,虞斌,郝彪.复杂工况下薄管板换热器的安全评定[J].轻工机械,2013,31(6):104-107.
[15]郭崇志,陈文昕,纪昌盛.大型薄壁压力容器Shell51单元模型的应力线性化分析[J].化工机械,2005,32(5):275-278.