摘要
传热管流致振动是核电厂蒸汽发生器传热管失效的主要原因之一,在核电厂设计蒸汽发生器时,需对蒸汽发生器传热管流致振动问题进行分析。传热管与支撑板及抗振条之间存在小尺度间隙,这类间隙具有非线性效应,在进行流致振动线性分析时应考虑对间隙进行线性化等效处理。本文从理论研究和模拟分析两方面出发,对传热管与支撑板及抗振条之间间隙对传热管动态特性的影响进行分析。理论和模拟分析可知,传热管间隙对传热管整体振动的作用接近于简支。在进行流致振动分析时,可采用简支代替间隙进行线性分析。
Background： Flow induced vibration （FIV） is one of the main cause of steam generator tubes failure. Flow induced vibration of steam generator tubes shall be analyzed with the design of steam generator. Small-scale gaps exist between tubes and tube support plates （TSP） or anti-vibration bars （AVB）. These gaps make the system non-linear. Purpose： Linear equivalence to the gaps shall be performed in the linear FIV analysis. Methods： This paper analyzes the influence of tube gaps on the dynamic characteristics of tubes with theoretical and simulation methods. Results： According to the analyses, the influence of gaps on tubes is similar to that of simple supports. Conclusions： Simple supports can be used to substitute gaps in the linear analysis for flow induced vibration.
出处
《核技术》
CAS
CSCD
北大核心
2013年第4期84-89,共6页
Nuclear Techniques
关键词
传热管
流致振动
间隙
简支
Tubes
Flow induced vibration
Gap
Simple support
