Dynamic mechanism of phase differences in One degree-of-freedom vortex-induced vibration of a cylindrical structure
| العنوان: | Dynamic mechanism of phase differences in One degree-of-freedom vortex-induced vibration of a cylindrical structure |
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| المؤلفون: | Youhong Tang, Xiaojun Zhang, Chengbi Zhao, Wei Lin, Ang Qiu, Xiangxi Han |
| المصدر: | Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment. 233:80-92 |
| بيانات النشر: | SAGE Publications, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Phase difference, Physics, Mechanical Engineering, Phase (waves), Structure (category theory), 020101 civil engineering, Ocean Engineering, 02 engineering and technology, Mechanics, 01 natural sciences, 010305 fluids & plasmas, 0201 civil engineering, Physics::Fluid Dynamics, Vibration, Mechanism (engineering), Vortex-induced vibration, Condensed Matter::Superconductivity, 0103 physical sciences, Fluid–structure interaction, Transient (oscillation) |
| الوصف: | The purpose of this study is to provide some insights into the phase mechanism of a cylindrical vortex–induced vibration. A transient coupled fluid–structure interaction numerical model is adopted to simulate a cylindrical vortex–induced vibration. The vortex shedding around the cylinder is investigated numerically by a two-dimensional large eddy simulation approach which can catch more details of the flow field and more accuracy on computing hydrodynamic forces. The vortex shedding modes and response and hydrodynamic forces of a cylindrical vortex–induced vibration are acquired with varied frequency ratios. According to differences in the vortex shedding location, the vortex wake can be characterized by two kinds of mode, the “first mode” and the “second mode.” The mechanisms behind the phases of the first mode and the second mode vortex wakes are investigated, and it is found that the flow speed induced by a cylindrical transverse vibration and the position of a vortex release are the root causes of the phase difference between the lift coefficient and transverse displacement. The speeds caused by a cylinder vibration and a cylinder-shed vortex are the reasons that the lift amplitude of an oscillatory cylinder is different from that of a fixed cylinder. |
| تدمد: | 2041-3084 1475-0902 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6cc46a1793e9a1ebc3adee3d2c59be15 https://doi.org/10.1177/1475090217717356 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........6cc46a1793e9a1ebc3adee3d2c59be15 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20413084 14750902 |
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