摘要
随着石油化工工程技术的发展,换热器操作条件的复杂化,换热器的疲劳工况在运行中时有出现,目前在进行换热器管板疲劳分析时,往往忽略管板与换热管实际连接接头处的峰值应力计算。采用有限元分析研究管板与换热管连接接头焊缝的峰值应力状况,证实了对换热器疲劳部位进行疲劳分析的必要性。对4种管板与管子连接接头焊缝的高应力进行了计算比较,根据管板弯曲变形的特点,提出了一种受力最佳、制造和检验均很方便的、可避免疲劳分析且合理的管板及其换热管连接结构。
With the development of petrochemical engineering technology,the operating conditions of heat exchanger become complicated,and the fatigue conditions of heat exchanger occur now and then during the operation.However,the peak stress calculation of the actual weld joint between heat exchanger tube and tubesheet is often ignored during the fatigue analysis.In this paper,the peak stress of the weld joint between heat exchanger tube and tubesheet is studied with finite-element analysis,and the necessity of fatigue analysis for the fatigue part of heat exchanger is proved.The high stresses of four different forms of weld joint between tube and tubesheet are compared.According to the bending deformation characteristics of tubesheet,a reasonable connection structure between fatigue tubesheet and tube,which has the best stress condition and is convenient for manufacture and inspection,is suggested,and fatigue analysis is not required.
出处
《石油化工设计》
CAS
2017年第4期1-4,共4页
Petrochemical Design
关键词
换热器
管板
换热管
疲劳
峰值应力
Heat exchanger
Tubesheet
Heat exchanger tube
Fatigue
Peak stress
