悬跨管道极限长度计算方法研究
Research on Calculation Method of Ultimate Length of Suspended Span Pipeline
摘要: 为建立满足工程应用的悬跨管道极限长度计算方法，采用数值仿真方法开展悬跨管道涡激振动模态分析研究，分析了不同端部约束条件、不同悬跨长度、不同内压荷载、不同轴向受力条件下悬跨管道涡激振动一阶、二阶模态自振频率，并以此为拟合数据，依据避免悬跨管道发生涡激共振的原则，考虑了一定的强度裕量，建立了悬跨管道涡激共振极限悬跨长度计算方法，应用已有文献数据验证了该计算方法的可靠性，表明该方法能够适应工程计算的需要。
Abstract: In order to establish the calculation method for the ultimate length of free spanning pipeline, the vortex-induced vibration modal analysis of free spanning pipeline was carried out by numerical simulation method. This article analyzes the first-order and second-order modal natural frequen-cies of vortex induced vibration of suspended span pipelines under different end constraint con-ditions, different span lengths, different internal pressure loads, and different axial force conditions. Based on the principle of avoiding vortex induced resonance in suspended span pipelines and considering a certain strength margin, a calculation method for the maximum span length of vortex induced resonance of suspended span pipelines is established. The reliability of this calculation method has been verified using existing literature data, indicating that it can meet the needs of engineering calculations.
文章引用：徐继录. 悬跨管道极限长度计算方法研究[J]. 仪器与设备, 2023, 11(3): 215-221. https://doi.org/10.12677/IaE.2023.113029

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