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	管壳式换热器换热管稳定性问题研究
	薛明德 ; 徐锋 ; 李世玉 ; XUE Ming-de ; XU Feng ; LI Shi-yu
	2010-06-08 ; 2010-06-08
关键词	管壳式换热器 屈曲 换热管轴向应力 tubular heat exchangers buckling tube axial stress TQ051.5
其他题名	A Research on Tubes Buckling Problem of Tubular Heat Exchangers
中文摘要	分别利用GB 151—1999计算方法、JB 4732—1995计算方法和弹性系统稳定性分析方法对换热管稳定性问题进行了研究。对不同参数的四个固定管板式换热器算例分别应用以上方法进行了计算,结果表明:现有的国家标准(GB 151)中换热管稳定性算法不考虑环板,将单根换热管失稳的欧拉临界应力除以安全系数ncr(取2)作为许用应力,其结果过于保守。; The tube buckling is analyzed as a lone tube by the traditional method and as an elastic system by FEM.Two different mechanical models,in which the tubesheet is attached with or without an unperforated rim,are analyzed by traditional method.Four types of the fixed heat exchangers are calculated.The results obtained by different methods are compared as follows:the critical buckling pressures obtained from two different mechanical models both are calculated by traditional method;the critical buckling pressures obtained from elastic system by FEM and from a lone buckling tube by the traditional method.The design rule in the standard GB 151—1999,which defines the safety coefficient of 2,is too conservative because it doesn't consider the contribution of the unperforated rim.Therefore,a more economical safety coefficient of 1.5 is suggested by this thesis.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/51137]
专题	清华大学
推荐引用方式 GB/T 7714	薛明德,徐锋,李世玉,等. 管壳式换热器换热管稳定性问题研究[J],2010, 2010.
APA	薛明德,徐锋,李世玉,XUE Ming-de,XU Feng,&LI Shi-yu.(2010).管壳式换热器换热管稳定性问题研究..
MLA	薛明德,et al."管壳式换热器换热管稳定性问题研究".(2010).

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