摘要
基于柔性多体动力学与流固耦合动力学理论,利用悬臂输液管Lagrange方程建立双节悬臂管流固耦合系统基座振动力学模型,进行节臂姿态、平均流速及节臂长度参数对流固耦合系统振动影响分析。结果表明,节臂姿态及长度参数变化对系统振动响应影响显著;平均流速增加使流体流动产生的激励作用增大、振动响应均值提高,对水平姿态具有较高的稳定工作流速;节臂长度参数对臂间弯矩影响显著,以臂间弯矩为控制力设计振动控制系统时应进行节臂长度优化;设计、构建输流管振动试验系统,并通过试验验证理论模型的正确性。所建动力学模型可为节臂主动控制提供理论基础。
The dynamic equation of two cantilever pipes conveying liquid and supported on vibration foundation was derived based on the flexible multi-body dynamic theory and fluid-solid coupling theory by using the Lagrange equation of cantilever pipe.A simulation analysis was carried out under different parameters,such as different attitudes,different mean flow velocity and different pipe length.The analysis results show that the pipe attitude and length parameter have significant effects on vibration responses.The vibration excitation is apparently enhanced with the increase of mean flow velocity and the horizontal posture of vibration system can provide higher steady flow rate.The pipe length has great effect on bending moment between pipes,so,the optimization design of pipe length should be performed in order to decrease the control force in the process of vibration contro.The test system for the two cantilever pipes was designed and the related experiments were conducted to prove that the dynamic equation used in the paper is correct and the model proposed provides good basis for further active control research on two cantilever pipes.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第14期183-187,共5页
Journal of Vibration and Shock
基金
中央高校基本科研业务费专项资金项目(2013G1251032
2013G3254014)
关键词
双节悬臂管
基座振动
流固耦合
试验研究
仿真分析
two cantilever pipes
vibration foundation
fluid-solid coupling analysis
experimental study
simulation analysis
