Æolian tones and stall flutter of lengthy objects in fluid flows

Æolian tones and stall flutter of lengthy objects in fluid flows
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流体流动中长物体的声调和失速颤动

DOI:
10.1088/1751-8113/43/37/375101
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发表时间:
2010
期刊:
Mathematical and Theoretical
影响因子:
--
通讯作者:
Landa P
Landa P
中科院分区:
--
文献类型:
--
作者:
Landa P

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本文从理论上研究了弹性圆柱在流动流体中的自发振动。这种振荡是造成例如涡轮机叶片和桥的失速颤振的原因,或者是在声学范围内引起失速音调的原因。涡从振荡表面分离的过程被建模为自激振荡器。涡流分离频率在很大的频率失配范围内与圆柱体的振荡保持同步,从而能够计算振幅和频率。只有当涡分离频率远小于圆柱的固有振荡频率时,同步才被破坏,然后出现双频振荡(拍频)。
We theoretically consider the spontaneous oscillations of an elastic cylinder in a streaming fluid flow. Such oscillations are responsible for stall flutter in eg turbine blades and bridges, or Æolian tones when in the acoustic range. The process of vortex separation from the oscillating surface is modelled as a self-excited oscillator. The vortex separation frequency remains synchronized with the oscillations of the cylinder over a great range of frequency mismatches, enabling the amplitudes and frequencies to be calculated. Only when the vortex separation frequency is much less than the cylinder's natural oscillation frequency the synchronization breaks down, and then two-frequency oscillations (beats) occur.
DOI: --
发表时间: 1997
期刊:
影响因子: --
作者:
P. Landa
通讯作者: P. Landa
DOI: --
发表时间: 1992
期刊:
影响因子: --
作者:
I. Neĭmark;P. Landa
通讯作者: P. Landa
具有随机振动悬挂轴的摆锤中噪声引起的相变。
DOI: --
发表时间: 1996
期刊: Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子: --
作者:
Landa;Zaikin
通讯作者: Zaikin
DOI: --
发表时间: 1965
期刊: --
影响因子: --
作者:
Ia. G. Panovko;I. I. Gubanova-I.
通讯作者: Ia. G. Panovko;I. I. Gubanova-I.
失速颤振分析
DOI: --
发表时间: 1973
期刊:
影响因子: --
作者:
L. Ericsson;J. Reding
通讯作者: J. Reding