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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。
The paper studies the suppression of wing / plug flutter using collision damper, analyzes the mechanism of the shock absorber damping, and puts forward the concept of “mode transfer defibrillation.” Aiming at the nonlinear damping characteristics of the crash damper, the equivalent linearization method and the numerical simulation method are used in the analysis of the mechanism of defibrillation. A quasi-triangular wing model with a wingtip plug is used to conduct the defibrillation wind tunnel experiment. The experimental results and theoretical calculations prove the feasibility of the scheme: after the crash damper is installed on the wing joint, the flutter speed of the system is increased by 29.4% and the flutter quality is greatly improved.