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站场异面双弯管振动特性及减振措施分析
Vibration characteristic and reducing measures analysis of double curved pipes in opposite directions at stations
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- DOI:
- 作者:
- 蒋目超
Jiang Muchao
- 作者单位:
- 河北华北石油天成实业集团有限公司利德公司，河北任丘 065700
- 关键词:
- 异面双弯管；共振；减振措施；固有频率；颗粒阻尼器
double curved pipes in opposite directions; resonance; vibration reducing measure; natural frequency; particle damper
- 摘要:
- 异面双弯管是油气站场复杂管道系统的重要组成部分，此类管道易产生异常振动。以流场控制方程
和固体场控制方程为基础，利用Solidworks软件构建异面双弯管道流固耦合模型，基于流场分析、模态分析
和振动响应分析，确定管道固有频率、振动原因、振动类型和薄弱管段，进而研究对比多种减振措施的效
果。结果表明：管道振动响应存在4个峰值，分别为292、305、1 000、1 402 Hz，与二阶、三阶、五阶、
六阶模态的管道固有频率接近；流体流动对低阶固有频率的影响更大，弯管段为关键危险部位，入口流速增
大会加剧弯管段的低阶共振强度；单纯优化管道结构减振效果有限；优选的管夹设置方案对3根直管段全覆
盖约束，振幅衰减率为54.8%，减振效果较好；当颗粒阻尼器的颗粒填充度为60%~70%时，减振效果最
佳，振幅峰峰值降至0.18 mm，衰减率为70.9%。研究成果可为提高油气站场内管道运行安全性和可靠性提
供技术支撑。
Double curved pipes in opposite directions serve as key components of complex pipeline systems at oil and gas stations, and such pipelines are prone to abnormal vibration. Based on flow field control equations and solid field control equations, this paper builds a flow-solid coupling model for double curved pipes in opposite directions by adopting the software Solidworks. Meanwhile, on the basis of flow field analysis, modal analysis, and vibration response analysis, the natural frequency, vibration causes, vibration types, and weak pipe sections of the pipelines are determined. Finally, research and comparison of vibration reducing measures are conducted from different aspects. The results show that the vibration response of the pipelines has four peaks, including 292, 305, 1 000, and 1 402 Hz, which are close to the natural frequency of the second, third, fifth, and sixth modes. The influence of fluid flow on the low-order natural frequency is greater. The curved pipe sections are the key dangerous parts. An increase in the inlet flow velocity will intensify the low order resonance intensity of the curved pipe section. Optimizing the pipeline structure for vibration reduction is not effective. The optimal pipe clamp layout scheme realizes a complete constraint on three straight pipe sections, with an amplitude attenuation rate of 54.8% and a better vibration reducing effect. For the particle damper, when the particle filling degree is 60%-70%, the vibration reducing effect is optimal, with an amplitude peak-to-peak value of 0.18 mm and an attenuation rate of 70.9%. The research results can provide technical support for improving the operation safety and reliability of pipelines at oil and gas stations.