Phase trajectories of non-linear oscillations of a tower structure with an attached damper in a uniform wind flow

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) Pub Date : 2019-12-03 DOI:10.3846/mbmst.2019.056

V. Volkova, L. Pakrastinsh, L. Gaile

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Abstract

This paper is devoted to the study of the dynamic behaviour of a tower structure with an attached damper. Two dampers are attached to the upper end of the rod in two mutually perpendicular planes. The oscillation damper is a mass attached to the rod by elastic coupling and a viscous friction. The mathematical model of the object being under consideration includes a system of two non-linear differential equations. The numerical simulation was used to study the dynamic behavior of a dissipative system with limited excitation, containing a pendulum vibration damper. The characteristics of the system amplitude − the speed of the wind flow is obtained. It is shown that the pendulum vibration damper can significantly reduce the amplitudes of resonant oscillations of the cantilever rod. It is also shown that the choice of system parameters makes it possible to avoid the establishing of resonant oscillations of the system. at the first resonance zone where the amplitudes of oscillations achieved the greatest values.

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具有附加阻尼器的塔结构在均匀气流中非线性振动的相位轨迹

本文研究了带有附加阻尼器的塔结构的动力特性。两个阻尼器在两个相互垂直的平面上连接到杆的上端。振荡阻尼器是通过弹性耦合和粘性摩擦附着在杆上的质量。所考虑的对象的数学模型包括一个由两个非线性微分方程组成的系统。采用数值模拟方法研究了含摆振减振器的有限激励耗散系统的动力特性。得到了系统振幅-风速的特性。结果表明，摆振减振器能显著降低悬臂杆的共振振幅。系统参数的选择可以避免系统谐振振荡的产生。在第一个共振区，振荡幅度达到最大值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019)

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