竖向地震荷载下输液管道弯曲振动的有限元分析

FEM Analysis of Bending Vibration of a Pipe Conveying Fluid during Vertical Earthquake

将与固定构筑物连接处的管道视为弹性梁，并考虑管道基础的不均匀沉降、竖向地震荷载的作用及管内液体流动引起的耦联振动，建立数学模型，进行动力响应分析。针对某些介质和结构参数，给出了一些数值结果。得出了流速对管道动力响应影响及管端不均匀沉降对其动力响应影响的若干初步结论。

he pipe conveying fluid at the linkage with fixed structure is supposed to be an elastic beam,and factors such as the unequal settlement of pipes basis,the action of vertical earthquake load and the coupling vibration caused by fluid liquid are also considered. According to that,the mathematical model is established and the dynamic analysis is done by using finite element method. Some numerical results are provided for certain values of material and structural parameters. SOme preliminary conclusion concerning with the effect of nowing velocity and unequal settelement of pipe ends on the dynamic response of a pipe are also obtained.