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首页> 外文期刊>Journal of mechanics of materials and structures >DYNAMICS AND STABILITY ANALYSIS OF AN AXIALLY MOVING BEAM IN AXIAL FLOW
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DYNAMICS AND STABILITY ANALYSIS OF AN AXIALLY MOVING BEAM IN AXIAL FLOW

机译：轴向流动轴向移动梁的动态与稳定性分析

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摘要

The present study focuses on investigating dynamics and stability of an axially moving beam subjected to axial flows. The axially moving beam is simply-supported at both ends. The added mass of fluid attached to the beam and the nonlinear additional deflection-dependent axial force are considered in deriving the governing equation of motion. Firstly, the stability analysis is performed with consideration of the effects of parameters such as axial flow velocity, the speed of axially moving beam and slenderness ratio of the beam. It is indicated that the beam loses stability via buckling or flutter at a critical speed of moving beam which is associated with variations of system parameters. Subsequently, the nonlinear dynamic responses of the beam for increasing moving speed under different axial flow velocities are investigated in detail. Results show that the beam can successively experience buckling and flutter behaviors. In addition, effects of system parameters like mass ratio, slenderness ratio, and pretension on instability mode, buckling displacement and flutter amplitude of the beam are explored to obtain their sensitivity to dynamics of the moving beam. These findings provide an important guidance for designing axially moving structures in engineering applications.
机译：本研究侧重于研究经受轴向流动的轴向移动梁的动态和稳定性。两端简单地支撑轴向移动的梁。在导出动作的控制方程中，考虑了附着在梁和非线性附加偏转依赖性轴向上的添加质量。首先，考虑诸如轴向流速的参数的效果，轴向移动的光束的速度和光束的细长比进行稳定性分析。结果表明，光束通过弯曲或颤动以与系统参数的变化相关的移动梁的临界速度来失去稳定性。随后，详细研究了用于增加不同轴向流速下移动速度的光束的非线性动力响应。结果表明，该光束可以连续地体验屈曲和颤动行为。此外，探索了系统参数的影响，如质量比，细长比和不稳定性模式的预张力，屈曲位移和梁的颤音幅度，以获得它们对移动梁的动态的敏感性。这些发现提供了在工程应用中设计轴向移动结构的重要指导。

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