This is a comprehensive study on a 2-degree-of-freedom flutter-based aeroelastic piezoelectric energy harvester supported with cubic and quintic nonlinear springs under unsteady airflow. The nonlinear system is simplified by dimension reduction analysis for a high-dimensional multistable system, and the flutter envelope is predicted and the parameters studied to analyze the effect on linear critical flutter velocity and output power. Then, the probability density function is obtained by stochastic averaging, and the influences of airflow disturbance intensity and nonlinear parameters on the most probable response and energy harvesting efficiency are analyzed. Appropriate disturbance intensity reduces flutter speed while increasing amplitude in the plunge direction and output voltage. However, excessive disturbance diminishes energy collection efficiency and may cause system failure.

中文翻译：

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基于颤振的气动弹性压电能量采集器的颤振包络预测和参数分析


这是对非定常气流下由三次和五次非线性弹簧支撑的 2 自由度基于颤振的气动弹性压电能量收集器的综合研究。对高维多稳态系统进行降维分析，对非线性系统进行简化，预测颤振包络，研究参数，分析对线性临界颤振速度和输出功率的影响。然后，通过随机平均得到概率密度函数，并分析气流扰动强度和非线性参数对最可能响应和能量收集效率的影响。适当的干扰强度可降低颤振速度，同时增加下沉方向的振幅和输出电压。但是，过度干扰会降低能量收集效率，并可能导致系统故障。