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[1]郑贤中,於潜军,周宁波,等.脉动流技术在管壳式换热器振动分析中的应用[J].武汉工程大学学报,2013,(08):68-73.[doi:103969/jissn16742869201308013]
　ZHENG Xian zhong,YU Qian jun,ZHOU Ning bo,et al.Application of pulsating flow technology in vibration analysis ofshellandtube heat exchanger[J].Journal of Wuhan Institute of Technology,2013,(08):68-73.[doi:103969/jissn16742869201308013]
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脉动流技术在管壳式换热器振动分析中的应用(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2013年08期
页码:
68-73
栏目:
机电与信息工程
出版日期:
2013-08-31

文章信息/Info

Title:
Application of pulsating flow technology in vibration analysis ofshellandtube heat exchanger
文章编号:
16742869(2013)08006806
作者:
郑贤中; 於潜军; 周宁波; 徐小明
武汉工程大学机电工程学院，湖北 武汉 430205
Author(s):
ZHENG Xianzhong; YU Qianjun; ZHOU Ningbo; XU Xiaoming
School of Mechanical and Electrical Engineering,Wuhan Institute of Technology,Wuhan 430205，China
关键词:
换热器; 脉动流; 流固耦合; 模态; 动态响应
Keywords:
heat exchanger;  pulsating flow;  fluidstructure coupled;  dynamic response
分类号:
TK124
DOI:
103969/jissn16742869201308013
文献标志码:
A
摘要:
为了避免脉动流技术产生的流体诱导振动造成换热器管的强度、刚度过大而导致结构失效,采用了有限元分析方法.建立换热器的流固耦合模型，施加有脉动流和无脉动流两种不同工况下的边界条件和荷载条件，从模态振型和动态响应等方面分析了两种工况下流体诱导振动对换热器管的影响.提取换热器管中间位置点和端部位置点的模态振型和动态响应曲线图，对两种工况下的计算结果曲线图进行了分析对比，结果表明：有无脉动流对管壳式换热器管的结构固有频率的影响不大；无脉动流作用时，换热管中间位置易发生刚度失效，端部位置易发生强度失效；有脉动流作用时，换热管中间位置的位移和端部所受的应力随时间呈周期性变化，可通过改变脉动流激励函数的系数来避免换热管发生振动失效.对脉动流技术安全地应用于换热器设备提供了一定的技术参考.
Abstract:
To avoid structure failure caused by excessive strength and stiffness of heat exchanger tube’s with fluid induced vibration while using the pulsating flow technology，the finite element analysis method was adopted. In the simulation process, fluidstructure coupled model of heat exchanger was created, and the boundary conditions and load conditions under pulsating flow and nonpulsating flow conditions were applied. The influence of fluid induced vibration on the heat exchanger tube was analyzed from modal vibration mode and dynamic response under the two kinds of working condition. Modal vibration mode and dynamic response curves at center point and end point of heat exchanger tube’s were extracted. The curves of calculation results above two kinds of working condition were compared. The results show that the natural frequency of TubeandShell heat exchanger tube structure is not effected by pulsating flow or nonpulsating flow; stiffness failure of the heat exchange tube’s middle position and the strength failure of the heat exchange tube’s end position frequently happens in nonpulsating flow circumstance; the displacement of middle position and the stress of end position of the heat exchange tube’s are changed periodically with pulsating flow effect; heat exchange tube vibration failure can be avoided by changing the pulse excitation function’s coefficient. The above conclusions provide certain technical reference to pulsating flow technology applied safely to heat exchanger equipment.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：20130423作者简介：郑贤中（1970），男，湖南常德人，副教授,博士.研究方向：声学及工程计算与仿真.
更新日期/Last Update: 2013-09-07