| OSCILLATION AMPLITUDE OF THE FREE END OF A FLEXIBLY MOUNTED RIGID CYLINDER IN TRIANGLE ARRANGEMENT |
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| 作者姓名： | Xu You-heng Dong Li-yun Huang Dong-qun Fudan University Shanghai P. R. China |
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| 作者单位： | Xu You-heng，Dong Li-yun，Huang Dong-qun Fudan University，Shanghai 200433，P. R. China |
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| 基金项目： | Project Supported by the National Natural Science Foundation of China，Shanghai New Technology Key Laboratory for Engineering Structure. |
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| 摘 要： | In this paper,the oscillation amplitude of the free end of a group of threecylinders are studied.The three cylinders are erected at the vertices of an equilateral trian-gle,and three arrangements are made in this study.One of the three cylinders is served asa working cylinder which is mounted by a flexible cantilever and two accelerometers areattached on the free end in two directions.The results of the three-cylinder arrangementare compared with those of two cylinders in tandem/side-by-side arrangement in the samecondition.The experimental results show that the rear cylinder of a group of three cylin-ders is affected more seriously than that of the corresponding two cylinders in the contrastarrangement.The main direction of oscillation is changed.The transversal oscillation isstronger than the longitudinal oscillation in the three-cylinder arrangement.On the con-trary,the transversal oscillation is much weaker than the longitudinal oscillation in two-cylinder arrangement.The largest transversal oscillat
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OSCILLATION AMPLITUDE OF THE FREE END OF A FLEXIBLY MOUNTED RIGID CYLINDER IN TRIANGLE ARRANGEMENT |
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| Xu You-heng,Dong Li-yun,Huang Dong-qun Fudan University,Shanghai ,P. R. China.OSCILLATION AMPLITUDE OF THE FREE END OF A FLEXIBLY MOUNTED RIGID CYLINDER IN TRIANGLE ARRANGEMENT[J].Journal of Hydrodynamics,1998(3). |
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| Authors: | Xu You-heng Dong Li-yun Huang Dong-qun Fudan University Shanghai P R China |
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| Affiliation: | Xu You-heng,Dong Li-yun,Huang Dong-qun Fudan University,Shanghai 200433,P. R. China |
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| Abstract: | In this paper, the oscillation amplitude of the free end of a group of three cylinders are studied. The three cylinders are erected at the vertices of an equilateral triangle, and three arrangements are made in this study. One of the three cylinders is served as a working cylinder which is mounted by a flexible cantilever and two accelerometers are attached on the free end in two directions. The results of the three-cylinder arrangement are compared with those of two cylinders in tandem/side-by-side arrangement in the same condition. The experimental results show that the rear cylinder of a group of three cylinders is affected more seriously than that of the corresponding two cylinders in the contrast arrangement. The main direction of oscillation is changed. The transversal oscillation is stronger than the longitudinal oscillation in the three-cylinder arrangement. On the contrary, the transversal oscillation is much weaker than the longitudinal oscillation in two-cylinder arrangement. The largest transversal oscillations are attained for the rear cylinder in the third arrangement (two cylinders in tandem arrangement with a side cylinder) at S/D =2. 5 and 3. 0. |
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| Keywords: | interference among three cylinders oscillation amplitude of free end reduced velocity oscillation induced by flow |
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