Low-Frequency Vibration Suppression of Large Inflatable Space Structures via Quasi-Zero-Stiffness Metamaterials
Yexiong Huang, Jialiang Sun, Fushou Liu, Dongping Jin
Abstract: Inflatable space structures are gaining increasing interest in aerospace engineering because of their advantages of easy storage, low weight, and high deployment performance. Vibrations arising from various orbital disturbances significantly influence the dynamic performance of inflatable space structures. In this study, quasi-zero-stiffness (QZS) metamaterials are employed and optimized to suppress the low-frequency vibrations of inflatable space structures. The metamaterial consists of unit cells that are periodically distributed along a long inflatable tube to generate a bandgap. Each unit cell consists of an inflatable tube, two QZS spokes and a central mass. The shape of the QZS spoke is optimized using Bézier curves to achieve quasi-zero stiffness properties. The band gap of an inflatable tube with infinite periodic QZS metamaterials is calculated by introducing Bloch boundary conditions into the absolute nodal coordinate formulation (ANCF). The vibration suppression performance is also analyzed by calculating the frequency domain responses of the inflatable tube containing finite periodic cells and by experimental validation via a 10-m-long inflatable tube with 5 unit cells. Finally, the on-orbit responses of an inflatable tri-boom system equipped with QZS metamaterials are analyzed, which demonstrates that the proposed QZS metamaterials provide an effective solution for low-frequency vibration control of inflatable space structures, significantly improving their operational dynamic performance.
文章链接：https://www.sciencedirect.com/science/article/pii/S009457652600161X
