期刊
AIAA JOURNAL
卷 57, 期 10, 页码 4482-4489出版社
AMER INST AERONAUTICS ASTRONAUTICS
DOI: 10.2514/1.J058522
关键词
-
资金
- National Natural Science Foundation of China [11572356, 11672337]
- Natural Science Foundation of Guangdong Province [2018B030311001]
This paper investigates the aeroelastic system of an airfoil with freeplay in pitch, with emphasis on the subcritical limit cycle (LC) that appears below the linear flutter velocity. The lowest flow velocity for the onset of LC, called the LC boundary, is predicted accurately by the eigenvalue analysis of an auxiliary generalized Jacobian such that it has a pair of purely imaginary eigenvalues. By analyzing the change in linear flutter velocity with respect to the remaining stiffness of the freeplay, an interesting finding is revealed whereby the lowest flutter velocity is just the LC boundary. Based on this feature and the generalized Jacobian, a mechanism responsible for the subcritical LC is elucidated, that is the flutter velocity decreases (but does not increase, as expected) with the remaining stiffness increasing.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据