摘要
管道系统的动力学问题可能直接影响整个工程系统的安全性,本文基于有限元分析软件,利用双向流固耦合方法,分别建立了较大雷诺数环境中横向流作用下的管道有限元分析模型,通过对不同来流速度下的应变数据分析,发现当来流速度超过临界流速时,管道的运动轨迹呈“8”字形振荡,其主频与结构固有频率接近时,结构响应幅值最大,即所谓的“锁频”现象。此外,流场响应与结构相同,也呈周期性变化。
Dynamic problems of pipeline system directly affect the safety of the entire engineering system,therefore it has important research significance and value.Based on finite element analysis software,the flow-induced vibration phenomena of pipeline in engineering were studied in this paper.By using the Bi-directional fluid-solid coupling method,the finite element analysis models under the transverse flow in high Reynolds number environment were established.According to the analysis of displacement data,it was found that when the flow velocity exceeds the critical velocity,the trajectory of the tube is"8",and the amplitude of the structural response is largest when the frequency is close to the natural frequency of the structure,that is,the so-called"lock frequency"phenomenon.Furthermore,the flow field is also periodic.
作者
杨凡
Yang Fan(China Aircraft Strength Research Institute,Xi'an 710065,China;Aviation Technology Key Laboratory of Full Scale Aircraft Structural Statics/Fatigue Test,Xi'an 710065,China)
出处
《航空科学技术》
2019年第6期39-44,共6页
Aeronautical Science & Technology
关键词
流致振动
双向流固耦合
数值模拟
数据分析
flow-induced vibration
bi-directional fluid-solid coupling
numerical simulation
data analysis
