用于原油管道减振的吸振器阻抗研究

Impedance Analysis of Tuned Vibration Absorbers for Oil Pipeline Vibration Control

针对输油管道剧烈振动会引发焊缝开裂、管道连接部疲劳破坏等问题,利用阻抗耦合法和动力吸振技术对原油管道的减振进行了研究。采用金属波纹管设计的吸振器,借助抱箍安装在管道上,可实现管道x,y,z 3个方向的减振,具有防爆、阻燃和三维减振的优点。设计的动力吸振器具有较好的减振效果,比较减振前后相同测点振动加速度的均方根值可知,管道减振效果达到64.9%以上,解决了管道振动偏高的问题,同时减小了由振动引起的管道内交变应力,降低了振动引发的疲劳破坏。该减振方案不需要拆解进出口管道,只需要在外部加装吸振器就能达到较好的效果,是一种控制输油管道振动的好方法。

In order to solve the problems of weld cracking and fatigue failure of pipeline joints caused by severe vibration of oil pipeline,the impedance coupling method and dynamic vibration absorption technology are adopted to realize the vibration reduction of the oil pipeline.The vibration absorber using metal bellows is installed on the pipeline with the help of a hoop.It can achieve vibration reduction in three directions(x,y and z)of the pipeline and has the advantages of explosion-proof,flame-retardant,and three-dimensional vibration reduction.Comparing the root mean square values of vibration acceleration at the same measuring point before and after vibration reduction,it can be seen that the vibration reduction effect of the pipeline reaches over 64.9%.The reduction of the pipeline vibration can reduce the action of alternating stress and the fatigue damage.This vibration reduction scheme does not require dismantling of the inlet and outlet pipelines,only needs to install vibration absorbers outside,which suggests that the vibration absorption technology is a better method for the vibration control of the oil pipeline.