基于Midas的双曲线型冷却塔有限元对比分析
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摘要
结合工程实例,采用Midas有限元软件对双曲线型冷却塔进行有限元建模及结构分析,并与冷却塔专业电算程序LBS的计算结果进行对比。结果表明:两种计算方式的计算结果趋势一致,在壳体中间部位结果比较接近,但在上下环梁附近内力差异很大。自重工况下,Midas的计算结果整体比LBS结果偏小,在上下环梁附近偏差明显;风载工况下,Midas薄膜力结果计算值整体偏小,弯矩、扭矩和剪力结果计算值整体偏大,且所有内力值在边界处差别很大;温度荷载工况下,Midas的计算结果与LBS结果相比基本一致,只是在上下环梁附近有稍许差异。
Combined with engineering examples,the Midas finite element software has been adopted,the finite modeling and structural analysis of the hyperbolic cooling tower has been made,and compared with the results of LBS computer program,aprofessional computer program for cooling towers.The results show that the calculation trend of the two methods is consistent.The results in the middle part of the shell are comparatively closed,but the internal forces between the upper and lower ring beams are very different.Under gravity condition,the calculation result of Midas is smaller than the result of LBS.The deviation is obvious near the upper and lower ring beams.Under wind load condition,the whole calculation values of are thinner in Midas film force result.The whole calculating result values of bending moment,torque and shear forces are larger,and all internal force values are very different at the boundary.Under the temperature load condition,the Midas calculation results are basically the same to that of the LBS results,but with only slightly differences near the the upper and lower ring beams.
Combined with engineering examples,the Midas finite element software has been adopted,the finite modeling and structural analysis of the hyperbolic cooling tower has been made,and compared with the results of LBS computer program,aprofessional computer program for cooling towers.The results show that the calculation trend of the two methods is consistent.The results in the middle part of the shell are comparatively closed,but the internal forces between the upper and lower ring beams are very different.Under gravity condition,the calculation result of Midas is smaller than the result of LBS.The deviation is obvious near the upper and lower ring beams.Under wind load condition,the whole calculation values of are thinner in Midas film force result.The whole calculating result values of bending moment,torque and shear forces are larger,and all internal force values are very different at the boundary.Under the temperature load condition,the Midas calculation results are basically the same to that of the LBS results,but with only slightly differences near the the upper and lower ring beams.
引文
[1]郑付明.ANSYS在冷却塔结构设计中的应用[J].汉江大学学报,2005,33(4),87-90.
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[4]李娟,卢亦焱,杨醒乾.冷却塔检测鉴定及有限元计算分析[J].防灾减灾工程学,2017,37(1):154-161.
[5]中华人民共和国住房和城乡建设部.GB50191—2012构筑物抗震设计规范[S].北京:中国计划出版社,2012.
[6]中华人民共和国住房和城乡建设部.GB/T50102—2014工业循环水冷却设计规范[S].北京:中国计划出版社,2014.
[2]陈家设,冷却塔强度与施工期稳定性分析的APDL程序[D].北京:北京大学,2008.
[3]李佳颖,任春玲,黄志龙.自然通风冷却塔的实验及有限元分析[J].力学与实践,2007,28(3):95-99.
[4]李娟,卢亦焱,杨醒乾.冷却塔检测鉴定及有限元计算分析[J].防灾减灾工程学,2017,37(1):154-161.
[5]中华人民共和国住房和城乡建设部.GB50191—2012构筑物抗震设计规范[S].北京:中国计划出版社,2012.
[6]中华人民共和国住房和城乡建设部.GB/T50102—2014工业循环水冷却设计规范[S].北京:中国计划出版社,2014.