模态局部化对T尾颤振特性的影响

杨 飞;杨智春

振动与冲击 ›› 2010, Vol. 29 ›› Issue (8) : 1-4.

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PDF(1202 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (8) : 1-4.
论文

模态局部化对T尾颤振特性的影响

  • 杨 飞1 ; 杨智春2
作者信息 +

EFFECTS OF MODE LOCALIZATION ON T-TAIL FLUTTER CHATACTERISTICS

  • YANG Fei1 ;YANG Zhi-chun2
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文章历史 +

摘要

模态局部化是弱耦合对称结构中一种不可预期的动力学现象。作为典型的工程对称结构,飞机T尾结构的地面振动试验中通常会发生强烈的模态局部化现象,使得T尾结构模态局部化研究成为T尾结构设计中一个重要的问题。基于失调T尾结构的气动弹性特性,提出了T尾颤振失调设计的概念,然后分析了平尾翼尖的质量失调设计和平尾根部的刚度失调设计,及其失调产生的模态局部化对T尾颤振特性的影响。算例结果表明:(1)失调产生的模态局部化对T尾结构的固有频率和振型产生较大影响。(2)在质量正失调时,T尾结构的模态局部化可以提高T尾颤振速度,而质量负失调时,T尾结构的模态局部化会降低T尾颤振速度。

Abstract

The effects of mistuning on the aeroelastic characteristics of T-tail structure were investigated using the beam T-tail model as example. A modal flutter analysis procedure for T-tail structure was used to account for the effects of mass and stiffness mistuning. Mode localization design of beam T-tail structure was made by introducing mass mistuning on the tip of horizontal stabilizer and stiffness mistuning at the root of horizontal stabilizer. Simulation results show that: the natural frequency and mode shape is changed by mode localization, and with the decrease of mistuning, the flutter velocity will decrease as the mode localization strength increases.

关键词

T尾 / 模态局部化 / 局部化度 / 失调 / 颤振 / 固有频率

Key words

T-tail / mode localization / localization strength / mistuning / flutter / natural frequency

引用本文

导出引用
杨 飞;杨智春 . 模态局部化对T尾颤振特性的影响[J]. 振动与冲击, 2010, 29(8): 1-4
YANG Fei;YANG Zhi-chun. EFFECTS OF MODE LOCALIZATION ON T-TAIL FLUTTER CHATACTERISTICS[J]. Journal of Vibration and Shock, 2010, 29(8): 1-4

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