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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.4 pt.B: Fluid-Structure Interaction >THE HYDRODYNAMIC FORCES ACTING ON A LONG FLEXIBLE CIRCULAR CYLINDER RESPONDING TO VIV
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THE HYDRODYNAMIC FORCES ACTING ON A LONG FLEXIBLE CIRCULAR CYLINDER RESPONDING TO VIV

机译：响应VIV的长形柔性圆柱上的水动力

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摘要

Distributions of the fluid forces acting along a long flexible circular cylinder free to respond in-line and transverse to a stepped current are presented. Forces are calculated using a finite element model of the cylinder with measured responses providing the input. The length to diameter ratio of the model used was 469, the mass ratio was 3 and the Reynolds number could be varied up to maximum value of approximately 2.6 · 10~4. Fluid force coefficients for two cases are presented: in the first, the dominant modes are the 2nd cross-flow and the 4th in line. For the second case the leading modes are the 7th and 12th respectively. In general, transverse force coefficients and in-line drag coefficients are found to be larger than those measured for short sections of cylinder undergoing free and forced one and two-dimensional motions. It is anticipated that the results will be of value to developers of vortex-induced vibration prediction methods.
机译：给出了沿一个长的柔性圆柱体作用的流体力的分布，该圆柱体自由地在线响应并横向于阶跃电流。使用圆柱体的有限元模型计算力，并以测得的响应作为输入。使用的模型的长径比为469，质量比为3，雷诺数最多可以变化到大约2.6·10〜4的最大值。给出了两种情况下的流体力系数：在第一种情况下，主导模式是第二次错流和第四次串联流。对于第二种情况，领先模式分别为第七和第十二。通常，发现横向力系数和轴向阻力系数要比承受自由和强制一维和二维运动的圆柱体短段所测量的要大。可以预料，该结果对涡激振动预测方法的开发者将具有价值。

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