某压气站管道减振措施研究

Study on Vibration Reduction Measures of Pipeline in a Compressor Station

刘恩斌 廉殿鹏 王兴杰 苏中亚 谢萍

LIUEnbin LIANDianpeng WANGXingjie SUZhongya XIEPing

西南石油大学石油与天然气工程学院, 四川 成都 610500 中联煤层气有限责任公司晋西分公司, 山西 吕梁 033200 中国石化江汉油田石油工程技术研究院, 湖北 武汉 430030 中国石化中原石油工程设计有限公司, 河南 郑州 450006 国家管网西部管道公司, 新疆 乌鲁木齐 830000

Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China China United Coalbed Methane Corporation Ltd., Lüliang, Shanxi 033200, China Research Institute of Petroleum Engineering, Jianghan Oilfield, SINOPEC, Wuhan, Hubei 430030, China Zhongyuan Petroleum Engineering Co. Ltd., SINOPEC, Zhengzhou, Henan 450006, China Western Pipeline Corporation, PipeChina, Urumqi, Xinjiang 830000, China

针对天然气站场管道异常振动问题，以某压气站出站管道为研究对象，开展站场管道振动分析研究，建立站场管道数值模型并通过现场振动测试验证模型的正确性。研究中采用流固耦合方法，对不同工况下的管道振动进行分析，提出两种减振方案并进行模拟验证。通过分析得出： 1）管道内的流体压力波动是站场管道产生异常振动现象的根本原因； 2）通过分析管道内流体压力波动频谱，发现管道内压力波动主要集中在低频范围内，管道内压力波动频率与管道系统的前两阶固有频率接近，因此，管道系统发生共振现象，使振动变得更加剧烈； 3）在提出的两种减振方案中，将联通管线直径由711 mm增大到1 016 mm，并增加合适约束的方案具有最佳的减振效果，其管道振动水平评估均为优秀。

Aiming at the problem of abnormal vibration of natural gas station pipeline, taking the outbound pipeline of a compressor station as the research object, the station pipeline vibration analysis is carried out, the station pipeline numerical model is established, and the correctness of the model is verified by field vibration test. The fluid-structure coupling method is used to analyze the vibration of pipelines under different working conditions. Then two vibration reduction schemes are proposed and verified by simulation. The main conclusions are as follows: 1) The fluid pressure fluctuation in the pipeline is the root cause of the abnormal vibration phenomenon of the station pipeline. 2) Through the analysis of the fluid pressure fluctuation spectrum in the pipeline, it is found that the pressure fluctuation in the pipeline is mainly concentrated in the low frequency range, and the pressure fluctuation frequency in the pipeline is close to the first two natural frequencies of the pipeline system. Therefore, the resonance phenomenon of the pipeline system makes the vibration more intense. 3) In the two vibration reduction schemes proposed, the diameter of connecting pipeline increased from 711 mm to 1 016 mm, and appropriate restraint measures are added. The results show that the scheme has the best damping effect, and the pipeline vibration level evaluation is excellent.

10.11885/j.issn.1674-5086.2021.08.10.01