摘要
目的:分析研究换热器90°范围内不同角度折弯过程中的伸长量、弯曲部位的应力分布以及变形情况。方法:基于有限元软件,采用数值模拟与试验研究相结合的方法,对折弯过程中铜管的应力、应变分布情况进行研究,采用线处理法对铜管的塑性应变进行均匀化和当量线性化处理,通过微积分的方法求解换热器的伸长量。结果:换热器初始折弯段是高应力区,最大拉应力与最大压应力均出现在该部位;折弯时伸长量的模拟值与实验值偏差为8.9%,并进一步得出30°、60°和75°折弯时换热器的伸长量。结论:本研究的数值模拟结果可靠,可为换热器尺寸设计和实际生产提供理论参考,有助于企业降低成本和节约资源。
Aims: The elongation, stress distribution and deformation of the bending part in the bending process of the heat exchanger at different angles within the range of 90° were analyzed and studied. Methods: Based on the finite element software, the stress and strain distribution of the copper pipe in the bending process was studied by using the method of numerical simulation and experimental research. The plastic strain of the copper pipe was homogenized and linearized by using the line processing method;and the elongation of the heat exchanger was solved by the calculus method. Results: The results showed that the initial bending section of the heat exchanger was a high stress area;and the maximum tensile stress and maximum compressive stress appeared in this area. The deviation between the simulated and experimental values of copper tube elongation was 8.9%. Furthermore, the elongation of copper tube at 30°, 60° and 75° was obtained. Conclusions: The numerical simulation results are reliable, which can provide theoretical reference for heat exchanger size design and actual production, thus reducing cost and saving resources.
作者
张盛峰
李莉
武佳
徐毅
张琳
栾德玉
ZHANG Shengfeng;LI Li;WU Jia;XU Yi;ZHANG Lin;LUAN Deyu(Qingdao Institute of Measurement Technology,Qingdao 266000,China;College of Electromechnical Engineering,Qingdao Universty of Science and Technology,Qingdao 266061,China)
出处
《中国计量大学学报》
2022年第2期151-158,共8页
Journal of China University of Metrology
基金
国家自然科学基金项目(No.52176040)。
关键词
计量学
换热器
折弯
伸长量
有限元
metrology
heat exchanger
bending
elongation
the finite element
