关于流弹性失稳激励机理中容易混淆问题的解析  

Analysis of Confusion in the Excitation Mechanism of Flow Elastic Instability

作　　者：姚伟达 矫明 林绍萱 张可丰 姚彦贵 熊珍琴[2] Yao Weida;Jiao Ming;Lin Shaoxuan;Zhang Kefeng;Yao Yangui;Xiong Zhenqin(Shanghai Nuclear Engineering Research&Design Institute Co.,Ltd.,Shanghai 200233,China;Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海核工程研究设计院有限公司,上海200233 [2]上海交通大学,上海200240

出　　处：《核安全》2021年第5期81-87,共7页Nuclear Safety

基　　金：上海市科技启明星项目,项目编号:20QB1403000。

摘　　要：管系或传热管的流致振动分析中流弹性失稳激励是非常重要的一种机理。在工程界和学术界对于流弹性失稳激励机理的认识存在一定的争议。本文通过三个案例分析表明:流弹性失稳实际上是其他两种共振激励机理的延伸,与其他两种共振激励最主要的区别在于它是一种流固强耦合条件下由于振动不稳定带来共振振幅的发散。本文还解释了有关流弹性失稳激励机理中容易产生的混淆问题。As we all know,the flow elastic instability excitation is a very important mechanism in the flow-in⁃duced vibration analysis of pipe systems or heat transfer tubes,but there is still some controversy in the engi⁃neering and academic circles about the flow elastic instability excitation mechanism.The analysis of three cases shows that fluid elastic instability is actually an extension of the other two resonance excitation mecha⁃nisms,but the main difference is that it is a divergence of resonance amplitude due to instability of vibration in a fluid-solid coupling condition.Analyze the confusion problems that are easy to produce in the excitation mechanism of flow elastic instability.

关 键 词：流弹性失稳 激励机理 混淆问题 解析 

分 类 号：TL35[核科学技术—核技术及应用]