ANALYSIS ON VIBRATION MODAL OF U-BIMETALLIC FINNED TUBES

MA TengFei; GUO JianYing; SHA FengHuan

doi:10.16579/j.issn.1001.9669.2017.04.007

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ANALYSIS ON VIBRATION MODAL OF U-BIMETALLIC FINNED TUBES

更新时间：2022-09-22

- ANALYSIS ON VIBRATION MODAL OF U-BIMETALLIC FINNED TUBES
- Journal of Mechanical Strength Vol. 39, Issue 4, Pages: 787-791(2017)
- 作者机构：
  
  1. 太原理工大学应用力学与生物工程研究所
  2. 太原理工大学矿业工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2017.04.007
  CLC：
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MA TengFei, GUO JianYing, SHA FengHuan. ANALYSIS ON VIBRATION MODAL OF U-BIMETALLIC FINNED TUBES. [J]. 39(4):787-791(2017)
DOI：

MA TengFei, GUO JianYing, SHA FengHuan. ANALYSIS ON VIBRATION MODAL OF U-BIMETALLIC FINNED TUBES. [J]. 39(4):787-791(2017) DOI： 10.16579/j.issn.1001.9669.2017.04.007.

摘要

双金属复合翅片管是国内外广泛使用的一种新型换热元件。为了对U型双金属复合翅片换热管的流体诱导振动破坏进行预测和控制,需要对其振动模态进行准确分析。采用锤击法和有限元法对U型钢-铝双金属复合翅片管的面内、面外振动模态进行了实验测试和数值模拟,并分析了U型管圆弧弯管半径R对其固有频率的影响特性。在自由支撑条件下,U型钢-铝双金属复合翅片管固有频率的有限元分析值与实测值相比,前18阶频率的最大误差为7.3%。在固支-简支条件下,U型钢-铝双金属翅片管的各阶固有频率均随着圆弧弯管半径R的增大而减小。

Abstract

U-bimetallic finned tube is a new widely used heat exchange component.In order to predict and control the flowinduced vibration damage of U-bimetallic finned heat exchange tubes,their natural frequencies must be calculated accurately.Inplane and out-of-plane vibration modal of U-bimetallic finned tubes were investigated by means of the hammering method and finite element method.The influence of arc bending radius R of U-bimetallic finned tubes on their natural frequencies was analyzed.The finite element simulation results of natural frequencies of U-bimetallic finned tubes were compared with the measured values for free-free boundary condition,the maximum error of the first 18 order frequencies is 7.3%.The natural frequencies of U-bimetallic finned tubes decrease with increasing the arc radius R for clamped-hinged case.

关键词

U型双金属翅片管振动模态锤击法有限元法

Keywords

U-bimetallic finned tubesVibration modalHammering methodFinite element method

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