主共振激励下内嵌流体悬臂欧拉梁自适应减振性能研究

王建伟;徐晖;马宁

振动与冲击 ›› 2011, Vol. 30 ›› Issue (8) : 41-44.

PDF(1715 KB)
PDF(1715 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (8) : 41-44.
论文

主共振激励下内嵌流体悬臂欧拉梁自适应减振性能研究

  • 王建伟1;徐晖2;马宁2
作者信息 +

Investigation on Self-adaptive Vibration Suppression for Cantilever Euler Beam with Interior Inlaid Fluid under Principal Resonant Excitation

  • Wang Jian-wei1; Xu Hui2; Ma Ning2
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摘要

结合内嵌自主移动质量梁/板实验平台实验结果,对一、二阶主共振激励下内嵌流体悬臂欧拉梁自适应减振模型进行了数值模拟。通过简化,将实际的流固耦合模型近似转化为具有活动边界的流体动力学模型。模拟结果与实验现象吻合较好,揭示了封闭腔内流体在梁作用下的三种运动特征。分析了流体壁面压力曲线特征,并建立了它与流体运动特征间的联系。通过与梁振动位移比较后发现,壁面压力曲线在时间上存在有明显的滞后特性。基于能量耗散的观点,针对简化的流体动力学模型,提出了流体运动能耗量化准则,从流体运动层面给出了判定减振性能的量化标准。

Abstract

Combining experiments carried out in the workbench for the beam & plate with interior inlaid freely moving mass, the self-adaptive vibration suppression is simulated for a cantilever Euler beam with interior inlaid fluid under the first and second principal resonant excitations. A hydrokinetic model with dynamic boundaries is established by simplifying the original liquid-solid model. The simulations agree with the experiments, fully revealing the three kinds of movements for the inlaid fluid. Fluid pressures acting on the walls are analyzed, and relations between the pressures and fluid movements are also established. Compared with the vibration displacements of the beam, the pressures varying with time express a significant delay characteristic in the time domain. From the energy dissipation, a quantitative criterion is proposed to evaluate the damping effect due to the fluid movements for the simplified model.

关键词

内嵌流体欧拉梁 / 活动边界流体动力学模型 / 自适应减振 / 滞后特性 / 量化准则

Key words

Euler beam with interior inlaid fluid / hydrokinetic model with dynamic boundaries / self-adaptive vibration suppression / delay characteristic / quantitative criterion

引用本文

导出引用
王建伟;徐晖;马宁. 主共振激励下内嵌流体悬臂欧拉梁自适应减振性能研究[J]. 振动与冲击, 2011, 30(8): 41-44
Wang Jian-wei;Xu Hui;Ma Ning. Investigation on Self-adaptive Vibration Suppression for Cantilever Euler Beam with Interior Inlaid Fluid under Principal Resonant Excitation[J]. Journal of Vibration and Shock, 2011, 30(8): 41-44

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