| 摘要: |
| 为了评估随机振动载荷下减压阀的安全可靠性,在减压阀振动机制分析基础上,利用有限元分析软件Workbench建立某天然气分输站RMG530减压阀阀体有限元模型,根据现场测得的随机振动载荷对减压阀进行振动响应分析,获得响应功率谱密度,最后依据修正获得的减压阀材料S-N曲线,应用有限元疲劳分析软件NCode,通过时域和频域方法对减压阀进行随机振动疲劳分析,计算阀体关键部位的疲劳寿命。结果表明:减压阀结构设计比较保守,振动载荷下最小寿命发生在进口管段到阀座的拐角处,时域疲劳计算最小寿命为41.79 a,频域疲劳计算最小寿命为38.81 a。 |
| 关键词: 减压阀 随机振动 时域 频域 疲劳寿命 |
| DOI：10.3969/j.issn.1673-5005.2016.05.018 |
| 分类号::TE 974 |
| 文献标识码:A |
| 基金项目:中石油北京天然气管道有限公司科研项目(KY-KJ-13-053) |
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| Random vibration fatigue analysis of flow control valve RMG 530 |
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LI Yukun1, YOU Zeguang2, CHEN Xiaohong3, WU Zhonglin4
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(1.College of Pipeline and Civil Engineering in China University of Petroleum, Qingdao 266580, China;2.China Petroleum Pipeline Engineering Corporation, Langfang 065000, China;3.China Petroleum Pipeline Production Operation Company, Langfang 065000, China;4.Petrochina Beijing Natural Gas Pipeline Company Limited, Beijing 100000, China)
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| Abstract: |
| In order to assess the safety and reliability of the value body under random vibration loading, the model of valve and gas in the valve was established using element analysis software Workbench. Firstly, the stress response power spectral density was obtained by the flow control valve vibration response analysis based on the field test of random vibration load. According to the modified S-N curve of the flow control valve material, finite element fatigue analysis software NCode was used to analyze the random vibration fatigue of the reducing valve by the method of time domain and frequency domain. The results show that the minimum fatigue life point under random vibration loading is at the corner between the inlet section and the valve seat with the minimum calculated fatigue life of 41.79 years in time domain and with the minimum calculated fatigue life of 38.81 years in frequency domain. |
| Key words: flow control valve random vibration time domain frequency domain fatigue life |
