面向轨道车辆抗蛇行振动的磁流变脂阻尼器设计与台架测试

廖昌荣;赵丹侠;刘琼

振动与冲击 ›› 2013, Vol. 32 ›› Issue (4) : 54-58.

PDF(2155 KB)
PDF(2155 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (4) : 54-58.
论文

面向轨道车辆抗蛇行振动的磁流变脂阻尼器设计与台架测试

  • 廖昌荣,赵丹侠,刘琼
作者信息 +

A Design Method of Magneto-rheological Grease Damper for Railway Vehicle Anti-hunting Vibration and Experimental Tests

  • Liao Chang-rong Zhao Dan-xia Liu Qiong
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摘要

针对磁流变液阻尼器存在磁场利用率不高和磁流变液沉降导致控制特性劣化的问题,提出一种基于多级径向流动模式的磁流变脂阻尼器方案,将磁流变脂的多级径向流动分解为源流与汇流的对称组合,建立了磁流变脂径向流动的分析模型。利用磁流变脂微单元平衡得出了磁流变脂尊静态径向流动微分方程,采用磁流变脂双粘度本构模型和无滑动边界条件,导出了磁流变脂径向流动速度分布函数和径向压力梯度分布函数。绘制了磁流变脂在不同半径处流动速度分布图,得到了磁流变脂阻尼器的阻尼力计算方法。按照轨道车辆抗蛇行减振器的技术要求,设计制作了基于多级径向流动模式的磁流变脂阻尼器样机,利用J95-I型油压减振器试验台对其示功特性进行了测试,结果表明在不同激励电流下的磁流变脂阻尼器理论示功特性与实验示功特性能较好吻合。

Abstract

a magneto-rheological(MR) grease damper based on multi-stages radial flow mode is put forward in view of low magnetic field utilization resulting from short channels and performances degradation resulting from MR fluid settlements. An analytical model is set by dividing symmetrically damping channel into radial source flow channel and radial confluent flow channel. Flow differential equation in quasi-steady radial flow is obtained from MR grease micro-element force equilibrium at radial coordinate. Both radial flow velocity profile and radial pressure distribution are obtained by solution the flow differential equation using MR grease Bi-viscous constitutive model and no-slip boundary condition. Diagram of radial flow velocity with various radial coordinates are plotted by means of the radial flow velocity profile. The damping force algorithms of MR grease damper also are obtained by integration of radial pressure gradient with respect to radial coordinate. In order to validate rationality of the analytical model, a MR grease damper based on multi-stages radial flow mode is designed and fabricated in accordance with technical requirements of railway vehicle anti-hunting vibration isolation system. The experimental test from J95-I Shock Absorber Test-bed with sine wave excitation are accomplished under the condition of piston peak velocity 0.025m/s, oscillation amplitude 25mm and coil electric current range from 0.2 to 1.0 A in increments of 0.2 A. The experimental results reveal that analytical damping forces vs. disk displacements diagram are in good agreement with experimental those.

关键词

磁流变脂 / 磁流变液 / 阻尼器 / 径向流动

Key words

magneto-rheological grease / magneto-rheological fluid / damper / radial flow

引用本文

导出引用
廖昌荣;赵丹侠;刘琼. 面向轨道车辆抗蛇行振动的磁流变脂阻尼器设计与台架测试[J]. 振动与冲击, 2013, 32(4): 54-58
Liao Chang-rong Zhao Dan-xia Liu Qiong. A Design Method of Magneto-rheological Grease Damper for Railway Vehicle Anti-hunting Vibration and Experimental Tests[J]. Journal of Vibration and Shock, 2013, 32(4): 54-58

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