本文提出了一种带有振动控制与能量采集的多功能点阵夹芯梁(Multifunctional-Lattice Sandwich Beam，M-LSB)结构。首先，在点阵夹芯梁内部安装了镍钛合金型非线性能量阱(Nitinol-Nonlinear Energy Sink，N-NES)，以实现振动抑制。其次，在梁上铺设超磁致伸缩薄片(Giant Magnetostrictive Lamina，GML)，通过GML的维拉里效应实现能量采集。根据哈密顿原理和牛顿第二定律，建立了气动环境下耦合系统的运动方程。使用龙格-库塔法计算动力学方程得到了有无N-NES时多功能点阵夹芯梁的时域响应，验证了N-NES的振动控制效果和GML的能量采集效率。结果表明，N-NES可以实现高效的振动抑制，GML可以有效地收集气动环境下点阵夹芯梁的振动能量。
Vibration Control and Energy Harvesting of Lattice Sandwich Beam under Aerodynamic Forces
This paper proposed a multifunctional lattice sandwich beam(M-LSB)structure.Firstly,a Nitinol-Steel wire rope nonlinear energy sink(N-NES)is installed inside the lattice sandwich beam to a-chieve vibration suppression.Secondly,a giant magnetostrictive lamina(GML)that is laid on the beam to achieve energy harvesting through the Villari effect of GML.Based on the the Hamilton's principle and Newton's second law,the equations of motion of the coupled system under aerodynamic environment are established.The time-domain response of the multifunctional lattice sandwich beam with and with-out N-NES is obtained by using the Runge-Kutta method to calculate the dynamic equations,and the vi-bration control effect of N-NES and the energy harvesting efficiency of GML are verified.The results show that the N-NES can achieve efficient vibration suppression and the GML can efficiently harvest the vibration energy of the lattice sandwich beam under aerodynamic environment.
万方数据
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