摘要
对利用碰撞阻尼器抑制机翼／外挂颤振问题进行了研究，分析了碰撞阻尼器抑颤的机理，提出了“模态转移抑颤”的概念．针对碰撞阻尼器的非线性阻尼特性，在抑颤机理分析中采用了等效线化法和数值仿真法两种途径，并对一个带翼尖外挂的准三角机翼模型进行了抑颤风洞实验．实验结果及理论计算都证明了该方案的可行性：在机翼外挂联接处安装碰撞阻尼器后，系统的颤振速度提高了２９．４％，颤振品质也大获改善。
Both theoretical analysis and wind tunnel tests are performed to investigate the problem of wing/storenutter suppression using an impact damper. The flutter suppression mechanism of the impact dampper isstudied and the concept of 'mode shift nutter suppression' is also proposed in this paper. Equivalent linearization and numerical simulation methods are used in the suppression mechanism analysis by consideringthe nonlinear damping characteristics of the impact damper. The suppression scheme is applied to a wing'model with tip store in wind tunnel. Test results show that the critical nutter speed of the damped systemis increased by 29. 4K,and the nutter quality of the system is obviously improved.
出处
《振动工程学报》
EI
CSCD
1995年第1期1-7,共7页
Journal of Vibration Engineering
基金
航空科学基金
关键词
减振装置
颤振阻尼器
机翼
飞机
vibration dampers
flutter dampers
impact damper
wing/store nutter
flutter suppression
