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基于均匀流场的弹性圆柱体涡激振动实验,提出了一个考虑流固耦合的涡激升力谱模型。该升力模型采用了Webull分布模型,以流速、约化速度、圆柱体直径和圆柱体固有频率为模型参数,通过引入圆柱体固有频率来考虑流固耦合的影响,避免了时域模型中直接计算圆柱体的顺流向振动响应问题。与实验结果比较表明,该模型可用于均匀流场的涡激振动预测。
Based on the vortex-induced vibration experiment of elastic cylinder with uniform flow field, a vortex-induced pressure spectrum model considering fluid-structure interaction is proposed. The lift model uses the Webull distribution model. Taking the flow rate, reduction speed, cylinder diameter and cylinder natural frequency as model parameters, the effect of fluid-solid coupling is considered by introducing the natural frequency of the cylinder, which avoids the direct calculation in the time-domain model Downstream vibration response of cylinder. The experimental results show that this model can be used to predict the vortex induced vibration in uniform flow field.