Vortex-induced vibrations are often unwanted as they can lead to catastrophic failure of the associated structures, warranting countermeasures to mitigate or suppress these vibrations. Due to the nature of nonlinearities in fluid–structure interaction (FSI) problems, analytical solution techniques for FSI problems have limited applicability at best. On the other hand, the numerical solution of vortex-induced vibrations is quite challenging, especially for problems undergoing large structural deformations, let alone the simulation of effective control techniques for suppressing unwanted vibrations. In this work, a robust and computationally efficient simulation framework is proposed to simulate fluid–structure–control interactions problems involving rigid or flexible structures. The effectiveness of the proposed framework in designing effective controller mechanisms for controlling the onset as well as the amplitude of vortex-induced vibrations is illustrated by studying the examples of lock-in of a circular cylinder, galloping of a square body and vortex-induced vibrations of a flexible, lightweight beam under different parameter settings for the controllers.

中文翻译：

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刚性和柔性结构的流体-结构-控制相互作用问题的统一仿真框架

涡激振动通常是不需要的，因为它们会导致相关结构的灾难性故障，需要采取对策来减轻或抑制这些振动。由于流固耦合 (FSI) 问题中的非线性特性，FSI 问题的解析求解技术的适用性充其量是有限的。另一方面，涡激振动的数值求解非常具有挑战性，特别是对于经历大结构变形的问题，更不用说模拟抑制不需要的振动的有效控制技术了。在这项工作中，提出了一个稳健且计算效率高的模拟框架来模拟涉及刚性或柔性结构的流体-结构-控制相互作用问题。