Heave plates are structural components used for reducing the vibrations caused by environmental forces on marine and offshore structures by changing the hydrodynamic properties. The fact that the added mass increase via heave plates does not always lead to the structural response reduction underscores the role of damping in maintaining the vibration amplitude within allowable limits. In the present experimental study, a novel combined rigid-elastic design is used to improve the damping through the velocity increase in the elastic part and added mass creation in the central rigid part. The desired percentage of total added mass and damping can be adjusted by changing the rigid-to-elastic parts diameter ratio, which is the main scope of this experimental research. Frequency of vibration, which affects the elastic edge excited mode shapes, also affects the forming of the vortex shedding. Experimental tests show that the frequency increase generally causes high damping performance provided that the excited mode shapes are axisymmetric, which strongly depends on equivalent stiffness and mass.

中文翻译：

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通过实施新型刚弹组合垂荡板增强流体动力阻尼

升沉板是用于通过改变水动力特性来减少环境力对海洋和近海结构造成的振动的结构部件。通过波浪板增加的质量增加并不总是导致结构响应降低这一事实强调了阻尼在将振幅保持在允许范围内的作用。在目前的实验研究中，一种新颖的刚弹性组合设计用于通过弹性部分的速度增加和中心刚性部分的增加质量来改善阻尼。可以通过改变刚性与弹性部件的直径比来调整所需的总附加质量和阻尼百分比，这是本实验研究的主要范围。影响弹性边缘激发模式形状的振动频率，也影响涡旋脱落的形成。实验测试表明，频率增加通常会导致高阻尼性能，前提是激发模式形状是轴对称的，这在很大程度上取决于等效刚度和质量。