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首页> 外文期刊>Ocean Engineering >Flow-mediated interaction between a vibrating cylinder and an elastically-mounted cylinder
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Flow-mediated interaction between a vibrating cylinder and an elastically-mounted cylinder

机译：振动缸和弹性安装缸之间的流动介导相互作用

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摘要

This study investigates the interaction between two cylinders of an identical diameter immersed in still fluid: the master cylinder is subject to forced vibration, while the adjacent slave cylinder is elastically-mounted and has only one-degree-of-freedom along the centreline of the two cylinders. The hydrodynamic interaction is simulated with an extensively-validated 2D Navier-Stokes solver that is based on the finite element method and the Arbitrary Lagrangian-Eulerian method. Extensive simulations are conducted, with a fixed Reynolds number of 100. The initial clearance distance, normalised by the cylinder diameter, ranges from 0.2 to 1.0. The mass ratio of the cylinder over the displaced fluid ranges from 1.5 to 2.5. The vibrating amplitude of the master cylinder, normalised by the cylinder diameter, varies from 0.025 to 0.1. Frequencies of the master's vibration, normalised by the slave's structural natural frequency, ranges from 0.05 to 2.4. When the frequency of the master cylinder reaches the immersed natural frequency of the slave cylinder, the slave cylinder's vibration observes resonance, and the phase difference between the two cylinders' movement experiences a 180 degrees shift. In resonance, the slave-master phase difference is about 90 degrees. The frequency of the vibration is found to significantly affect the flow features.
机译：这项研究调查了浸没在静止流体中的两个相同直径的圆柱体之间的相互作用：主圆柱体受到强迫振动，而相邻的从动圆柱体被弹性安装，并且沿着圆柱体的中心线只有一个自由度。两个汽缸。使用基于有限元方法和任意Lagrangian-Eulerian方法的，经过广泛验证的2D Navier-Stokes求解器模拟了流体动力相互作用。在固定雷诺数为100的情况下进行了广泛的模拟。通过圆柱直径标准化的初始游隙距离范围为0.2到1.0。圆柱体与排出的流体的质量比为1.5到2.5。通过气缸直径归一化的主气缸振动幅度在0.025到0.1之间变化。由从属的结构固有频率标准化的主控振动频率范围为0.05到2.4。当主缸的频率达到从动缸的沉浸固有频率时，从动缸的振动会产生共振，并且两个缸的运动之间的相位差会发生180度的偏移。在共振中，从机-主机相位差约为90度。发现振动频率会显着影响流动特性。

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