基于流固耦合的线性充液卡箍管路振动研究

充液管路液压系统广泛应用于舰船、车床、制冷等大型运输系统上，由于管子的振动效果是充液流动情况所致，对其研究需要借助于流固耦合理论。本文针对线性充液管路，在有限元理论的基础上建立振动的流固耦合模型，研究对称布局限制下的管路振动模态及 Von Misses 应力分布情况，重点分析充液管路长度对压力波动的影响。结果表明：卡箍设置处能够明显减弱振幅，越远离卡箍设置处振动效果越明显，共振情况随着振动频率的增加明显得到加强；应力最大点只要布局在管子内部。压力变化是液压作用的宏观表现，波动的曲线反应出充液过程是一个复杂的作用过程，尽量选择布置长度较短的充液管路。

Vibration research on linear liquid clamp pipe based on the fluid-solid coupling

The liquid pipeline hydraulic system is widely used in aircraft, lathe, refrigeration and other large transport systems. Due to the effect of the vibration of the pipe is caused by the liquid flow conditions, the study of the need of fluid-structure interaction theory. In view of the linear liquid pipeline, fluid-solid coupling vibration model is established on the basis of the finite element theory. The pipe vibration modal and Von Misses stress distribution under the limit of symmetric-al layout are studied. Results show that the clamp can be dramatically reduced amplitude. The more far away from the clamp set in vibration, the more obvious effect. The resonance condition obviously strengthen with the increase of vibration fre-quency; the maximum stress point as long as the layout inside the pipe. Pressure change is the macro performance of hy-draulic effect and volatility curve reflects the charging process is a complex process, try to choose decorate liquid pipe of the shorter length.