输气站场支管盲端振动问题解决方案

Solution to the Vibration Problem of Blind End of Branch Pipe in Gas Transmission Station

在输气站场工程中,输气站场支管盲端引起的振动常被忽视,但在压力和流量波动较大的输气站场,支管盲端引起振动非常明显,一般通过事后调整管道布置来避免运行中出现的振动问题。设计人员常根据经验筛选出易出现振动的工艺管道做动态模拟和防振动设计,一般工艺管道仅做静态设计。采用英国能源研究所指南提出的支管盲端振动失效概率计算方法,对国内某输气站场内管道系统中的支管盲端进行分析计算,调整不合理的管道布置,有效规避了生产运营阶段出现的盲端振动。计算结果表明,该方法是支管盲端振动问题的有效解决方案,可用来检验管道布置中支管盲端的合理性,并进行优化设计。

In the gas transmission station engineering,the vibration caused by the blind end of the branch pipe is often ignored.However,in the gas transmission station with large fluctuation of pressure and flow,the vibration caused by the blind end of the branch pipe is very obvious.Generally,the vibration problem in operation can be avoided by adjusting the pipeline layout after the event.According to experience,designers often select vibration-prone process pipelines for dynamic simulation and antivibration design,and general process pipelines are only statically designed.In this paper,the blind end of branch pipe in a domestic gas transmission station is analyzed and calculated by using the calculation method of blind end vibration failure probability of branch pipe proposed in the guide of the Energy Institute of UK,and the unreasonable pipeline layout is adjusted to avoid the blind end vibration in production and operation stage effectively.The calculation results show that this method is an effective solution to the vibration problem of the blind end of branch pipes,and can be used to check the rationality of the blind end of branch pipe layout and optimize the design.