标题： 耦合非线性翼型中间歇性混合相互作用的Flutter抑制增强 显示英文标题

标题： Flutter Suppression Enhancement in Coupled Nonlinear Airfoils with Intermittent Mixed Interactions

摘要： Flutter抑制有助于提高结构可靠性，以确保飞机的飞行安全。 在本研究中，我们提出了一种新策略，以扩大振幅死亡（AD）区域，从而增强两个耦合的相同机翼在结构非线性条件下的颤振抑制。 具体而言，我们引入了一种间歇性混合耦合策略，即两个机翼之间间歇性瞬时耦合和间歇性时滞耦合的线性组合。 进行数值模拟以揭示不同耦合场景对耦合机翼系统动力学行为的影响机制。 获得的结果表明，在耦合强度和时滞参数的一定范围内，耦合机翼系统会经历预期的AD行为。 连续混合耦合比连续纯时滞耦合在更大的耦合强度参数集上更有利于AD的发生。 此外，间歇性相互作用的存在可以进一步扩大AD区域，即增强颤振抑制。 我们的研究结果支持飞机机翼的结构设计和优化，以减轻不必要的气动弹性不稳定性行为。 显示英文摘要

摘要： Flutter suppression facilitates the improvement of structural reliability to ensure the flight safety of an aircraft. In this study, we propose a novel strategy for enlarging amplitude death (AD) regime to enhance flutter suppression in two coupled identical airfoils with structural nonlinearity. Specifically, we introduce an intermittent mixed coupling strategy, i.e., a linear combination of intermittent instantaneous coupling and intermittent time-delayed coupling between two airfoils. Numerical simulations are performed to reveal the influence mechanisms of different coupling scenarios on the dynamical behaviors of the coupled airfoil systems. The obtained results indicate that the coupled airfoil systems experience the expected AD behaviors within a certain range of the coupling strength and time-delayed parameters. The continuous mixed coupling favors the onset of AD over a larger parameter set of coupling strength than the continuous purely time-delayed coupling. Moreover, the presence of intermittent interactions can lead to a further enlargement of the AD regions, that is, flutter suppression enhancement. Our findings support the structural design and optimization of an aircraft wing for mitigating the unwanted aeroelastic instability behaviors.