国防科技大学学报2024，Vol.46Issue(2)：79-85,7.DOI:10.11887/j.cn.202402008
高速飞行器间隙非线性机翼颤振的非线性能量阱抑制
Suppression of nonlinear flutter for a wing with freeplay of high speed aircraft using nonlinear energy sink
摘要
Abstract
The subcritical problem of wing flutter system with freeplay nonlinearity was addressed by introducing the NES(nonlinear energy sink)technology to improve the critical velocity of the system's limit cycle oscillation.A dynamic model of flutter system with NES control for wings with freeplay nonlinearity was established,and the suppression effects of NES parameters such as mass ratio,frequency ratio,damping ratio,and relative position on the limit cycle oscillation of the flutter system were analyzed.The influence of NES parameters on the critical speed of the limit cycle oscillation of the flutter system was also investigated.The results show that a larger damping ratio can stabilize the system at a smaller natural frequency ratio but required a more stringent location requirement for the NES,i.e.,closer to the leading edge of the wing.On the other hand,a smaller damping ratio results in a smaller NES mass required to stabilize the limit cycle response of the flutter system.When the NES location is closer to the leading edge of the wing,increasing the natural frequency ratio significantly improve the suppression effect of limit cycle oscillation,and increasing the mass ratio also significantly improve the suppression effect and critical speed of limit cycle oscillation.Additionally,a smaller damping ratio of the NES results in better suppression of limit cycle oscillation in the flutter system.关键词
非线性能量阱/间隙非线性/机翼/极限环振荡/颤振抑制Key words
nonlinear energy sink/freeplay nonlinearity/wing/limit cycle oscillation/flutter suppression分类
航空航天引用本文复制引用
钮耀斌,王中伟,黄伟..高速飞行器间隙非线性机翼颤振的非线性能量阱抑制[J].国防科技大学学报,2024,46(2):79-85,7.基金项目
国防基础科研基金资助项目(JCKY2021205B108) （JCKY2021205B108）
国家自然科学基金资助项目(51505487) （51505487）
