| 在横向气流作用下螺旋管管阵流弹不稳定性的分析 |
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| 引用本文： | 刘瑞兰.在横向气流作用下螺旋管管阵流弹不稳定性的分析[J].华北水利水电学院学报,1997,18(4):9-13. |
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| 作者姓名： | 刘瑞兰 |
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| 作者单位： | 华北水利水电学院动力系 |
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| 摘 要： | 采用平面圆环近似地模拟螺旋管结构，根据描述弯管自由振动的解析表达式对夹角为１３５°两端固支的螺旋管阵扇形结构进行自由振动分析，可半解析地确定各阶频率及解析的振型，再以实验为基础获得在横向气流作用下该螺旋管阵扇形结构的流体力系数，对这一特定的管阵结构的临界流速进行预测，计算结果和实验结果相比较，两者相当一致。
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| 关 键 词： | 临界流速 螺旋管 流弹不稳定性 |
Fluidelastic Instability for Helical Tube Arrays in Cross-flow |
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| Abstract: | The structure of helical tube is approximately simulated as a plane ring.According to the free vibration analytic expression of curve tube,the free vibration of a ineluded angle 135° sector model fixed at two ends are analyzed,and the frequences and analytic vibration models can be semi-analytically determined.Using the Author's fluid force coefficients of helical tube arrays in air cross flow based on the experiments,the critical velocity of this structure was predicted.The evaluated results were in a good agreement with those of the experiment. |
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| Keywords: | ritical velocity Helical tube Fluidelastic instability |
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