流体诱导弹性管束振动响应数值分析

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摘要基于流固耦合问题的弱耦合法，研究弹性管束不同流速的壳程或/和管程流体诱导下的振动响应。研究表明，流体诱导振动幅值随壳程或/和管程流速的增加而增加。与相同管程流速条件相比，壳程流体引起的振幅较大。随壳程流速增加监测点振动频率增加；随管程流速增加监测点振动频率基本不变。壳、管程流体耦合诱导的振动位移曲线与仅壳程流体诱导的振动位移曲线类似，说明弹性管束工作过程中的振动主要由壳程流体诱导。流体诱导的振动频率接近管束第一阶固有频率时，监测点在y、z方向振幅逐渐趋于峰值。流体诱导弹性管束的振动主要表现为面内振动。

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	季家东1
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关键词 ：换热器, 弹性管束, 振动响应, 流固耦合

Abstract：Based on the weak coupling method of fluid-structure interaction, the vibration characteristics of the elastic tube bundle subjected to shell-side or/and tube-side cross flow are studied under different water inlet velocities. Numerical results show that the flow-induced vibration amplitude increases with increasing shell-side or/and tube-side water inlet velocity. However, the amplitude of shell-side flow-induced vibration is greater than that of tube-side flow-induced vibration with the same water inlet velocity. The flow-induced vibration frequency of the monitoring point increases with increasing shell-side water inlet velocity, and substantially unchanged when the tube-side water inlet velocity increases. Furthermore, the vibration curves of shell-side and tube-side flow-induced vibration are similar to the curves of shell-side flow-induced vibration. It is indicated that the vibration is mainly induced by the shell-side water. On the other hand, the vibration amplitudes of the monitoring points in y and z directions are gradually approaching the peak when the flow-induced vibration frequency is close to the first natural frequency of the elastic tube bundle. Additionally, the elastic tube bundle subjected to shell-side cross flow is mainly for in-plane vibration.

Key words： heat exchanger elastic tube bundle vibration response fluid-structure interaction

收稿日期: 2015-07-14 出版日期: 2016-03-15

引用本文:

季家东1，葛培琪1, 2，毕文波1. 流体诱导弹性管束振动响应数值分析[J]. 振动与冲击, 2016, 35(6): 80-84.
JI Jia-dong1，GE Pei-qi1, 2，BI Wen-bo1. Numerical analysis on flow-induced vibration responses of elastic tube bundle. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(6): 80-84.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I6/80

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