摘要
针对采油用管道内流体引发管道振动问题,研究了U形管路在内流作用下的振动特性,利用非线性耦合方法分析非稳定流体与管道相互耦合规律。流固耦合模态结果与前人计算结果相近,验证了数据的可靠性。模拟结果发现,在周期性脉动流体的作用下,管道最大应力及位移振动呈周期性变化;流体频率与管道基频相近时,管道位移振动频谱既有流体诱发的高频又有较低的管路基频。流体速度增加,管道位移增加,管道最大应力增加,管道基频减小。另外,发现脉动流体频率增加,管路基频增加。
Pipe vibration due to transient flow is very common in petrochemical industry,so the transient response of U pipe with various fluids were studied by the application of Adina-FSI.The simulation results were validated by comparing them with the results in literature obtained by numerical solution.The results show that the pipeline vibrates periodically with the periodically changing fluid velocity.The resonance vibration occurs when fluid frequency is similar to the pipe basic frequency,and at that time the pipe vibration frequency includes low pipe model frequency and high frequency induced by flow pulsations.The pipe frequency increases as fluid pulsation frequency increases and it decreases while fluid velocity increases.The maximum effective stress and vibration amplitude of pipe increase greatly with the increase of fluid velocity.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2012年第5期770-774,共5页
Journal of Chemical Engineering of Chinese Universities
基金
中央高校基本科研业务费专项资金资助
关键词
输油管路
流固耦合
非稳定流体
高频振动
oil pipe line
fluid-structure interaction
unsteady fluid
high-frequency vibration
