摘要
采用特征线法对输液管道流固耦合振动问题进行了数值分析研究。数值分析采用14-方程模型,为了提高数值分析精度,对传统特征线法进行了改进;给出了时间步长Δt和管道分段数N的确定条件,提出了自适应网格加密的方法来修正空间步长Δz以便更好地捕捉边界处液体压力的波动。对一典型液压系统的耦合振动响应进行了数值仿真,数值结果与实验结果吻合较好,证明了该方法的正确性和有效性。
Numerical analysis of fluid-structure coupled vibration of fluid-conveying pipe was carried out by using method of characteristics (MOC). 14-function model was adopted in the numerical analysis, and the MOC was improved to get higher numerical analysis precision. The conditions for determining the time step Δt and the number of divided straight pipe sects N were presented. The self-adaptive-mesh-manifolding method for modifying mesh spacing Δz close to boundary was put forward to catch accurately the change of fluid pressure. A numerical simulation on coupled vibration response of a hydraulic system was carried out, and the result shows that numerical result is consistent with experiment result, and the numerical method introduced is validated.
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第6期56-59,共4页
Journal of Vibration and Shock
基金
载运工具与装备省部共建教育部重点实验室开放基金资助
关键词
输液管道
流固耦合振动
数值分析
特征线法
fluid-conveying pipe
fluid-structure coupled vibration
numerical analysis
method of characteristics
