平板断面颤振过程中的能量输入特性研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (7) : 135-140.

论文

平板断面颤振过程中的能量输入特性研究

贾明晓1刘祖军1,2杨詠昕 2

作者信息 +

The energy input characteristics of plate section during the flutter

Jia Ming-xiao1 Liu Zu-jun1,2 Yang Yong-xin2

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文章历史 +

摘要

通过风洞试验研究了流线型较好的平板断面的颤振性能,基于流固松耦合的计算策略，应用CFD数值方法, 模拟了平板的颤振过程,并用相位平均的方法研究了颤振临界状态下模型尾部旋涡的演化规律, 分析表明模型尾部风嘴处呈直线排列的涡街的规律性摆动主导了结构振动直到模型振动发散。利用分块分析的思路研究颤振过程中气流能量在模型表面不同区域的输入特性,以及模型尾部旋涡的演化过程对模型表面气动力分布和能量输入特性的影响。分块分析的结果表明振动的模型通过迎风端风嘴从气流中吸收大量的能量, 且在一个完整的振动周期内气流输入到振动系统的能量不断增加,造成平板的颤振多为结构稳定性的突然丧失。

Abstract

The flutter performance of plate section was studied by wind tunnel tests. The flutter process was simulated by using of CFD numerical method based on the loosely coupled. The evolution law about Vortex near the rear nozzle of model in the flutter. Critical state was studied using the method of phase-average. The effect of alternating vortex near the rear wind lips leaded to the vibration of model until the structural divergence. The features of energy input and the aerodynamic distribution during the flutter were researched by adopting block analysis. The reach show that the model absorbed a lot of energy through the windward side nozzle from the air and in a complete vibration cycle, the energy input to the vibration of the system increased resulting in the sudden loss of structural stability.

导出引用

贾明晓刘祖军;杨詠昕 . 平板断面颤振过程中的能量输入特性研究[J]. 振动与冲击, 2013, 32(7): 135-140

Jia Ming-xiao Liu Zu-jun;Yang Yong-xin. The energy input characteristics of plate section during the flutter[J]. Journal of Vibration and Shock, 2013, 32(7): 135-140