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首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.2; 20051026-28; Nanjing(CN) >Vibration of a Parallel Plate-Type Structure in Two-dimensional Axial Flow
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Vibration of a Parallel Plate-Type Structure in Two-dimensional Axial Flow

机译：二维轴流中平行板型结构的振动

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摘要

Flow-induced vibrations of parallel plates in axial viscous flow were studied. Viscous flow theory was applied to describe the fluid-structure interaction. The fluid was supposed to be two-dimensional. The expressions of fluid velocities were created. The pressure grads were gotten with two-dimensional Navier-Stocks equation. Semi-analytical fluid pressures of a plate-fluid-plate system, a water trough, and a three-parallel plate-type structure were obtained. The added mass coefficients, added damping and added stiffness coefficients were determined. These analytical coefficients indicate a strong dependence on gap width and water viscous coefficient. The coupling effects of flow get stronger with the gap width being smaller. Computational results reveal that the frequencies of structure in flow decrease compared with the corresponding ones in air. The frequency values decrease with the increase of fluid velocities and will keep to a positive number. This is different from the results gotten by potential flow theory, which shows that the natural frequency decreases with the increase of velocity and will decrease to zero.
机译：研究了平行板在轴向黏性流动中的流致振动。粘性流理论被用来描述流固耦合。流体应该是二维的。创建了流体速度的表达式。利用二维Navier-Stocks方程获得压力梯度。获得了板液板系统，水槽和三平行板型结构的半分析流体压力。确定增加的质量系数，增加的阻尼和增加的刚度系数。这些分析系数表明对间隙宽度和水粘性系数的强烈依赖性。间隙宽度越小，流动的耦合作用越强。计算结果表明，与空气中的相应频率相比，流动中的结构频率降低了。频率值随着流体速度的增加而减小，并将保持为正数。这与势流理论得出的结果不同，后者表明自然频率随速度的增加而减小，并将减小为零。

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