磨擦阻尼用於非線性顫振抑制之研究

Nonlinear Flutter Suppression by Adding Frictional Damping

林文柏(Wen-Bol Lin) ； 鄭文弘(Wen-Hon Cheng)

《中國航空太空學會學刊》 32卷3期 (2000/09) Pp. 237-242

https://doi.org/10.6124/TAASRC.200009_32(3).05

摘要

機翼控制面經常含有鉸接間隙，此一缺陷可能導致機翼產生複雜之非線性顫振現象，對於此一現象，本文研究在鉸接間隙中加入磨擦阻尼，以抑制顫振現象之發生。經由數值模擬的驗證，得知加入適當的磨擦阻尼不但能徹底的消除極限循環與渾沌現象，又可大幅度降低翼面之振動幅度，不失爲一簡單有效的方法。本文係以一吊橋簡化模型與－全動式水平尾進行非線性顫振抑制之研究，以展現此一被動顫振抑制方法之效能。此外，文獻[2]所提出風速漸增的渾沌演化過程，在本文磨擦阻尼漸增的過程中，亦可觀察到逆向之渾沌演化現象。

關鍵字

顫振 ； 顫振抑制 ； 庫倫阻尼 ； 鉸接間隙

並列摘要

The investigation focuses on nonlinear flutter suppression of loaded lifting surfaces with freeplay. By using Coulomb friction which can be implemented by injecting viscoelastic material into freeplay, a study intended to suppress limit cycle and chaos is conducted. These have successfully been solved by the time domain method and the describing function method. The present study, demonstrated in the suspension bridge and the whole-movable horizontal tail model, shows that the passive method is workable not only in suppressing the limit cycle and chaos but also in reducing vibration amplitude. In addition, increase in Coulomb friction of the suspension bridge case may bring about inverse evolution of chaos.

並列關鍵字

Flutter ； Flutter suppression ； Coulomb friction ； freeplay