Numerical analysis of fluid-structure coupled vibration of fluid-conveying pipe

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.