Modeling and applications of variable structure damper

Runlin Chen, Wu Ouyang, Jimin Xu, Xiaoyang Yuan, Yan Li
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引用次数: 1

Abstract

Aiming at the damping and vibration isolation needs for high-speed rotor-bearing system, a variable structure damper was proposed, of which the stiffness and damping coefficients are not constant, but time-varying functions triggered by environmental events. The variable structure principles of stiffness components and damping elements in this new damper were analyzed. The mathematics and mechanics model of a single component were developed. The changing relationship of components critical mechanical parameters (stiffness and damping coefficients) with environmental factors was researched, and its movement and forces were analyzed. The four kinds of dampers were obtained to the point of function matching through the assembly of different parameters, wherein three kinds of variable structure damper. The impact of different preset forces, fluid temperature and structural parameters in two throttle type of pores and capillary on stiffness and damping coefficients of damping was analyzed. A traffic model of atypical hole throttling form was obtained through experimental modeling. About the three kinds of variable structure damper, its applications in engineering were explored from function features, application objects, working conditions, installation and arrangement way. This study provided a theoretical support for the development and application of the low failure probability and high reliability variable structure damper.
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变结构阻尼器的建模与应用
针对高速转子-轴承系统的减振和隔振需求,提出了一种变结构阻尼器,其刚度和阻尼系数不是恒定的,而是由环境事件触发的时变函数。分析了该阻尼器中刚度元件和阻尼元件的变结构原理。建立了单部件的数学和力学模型。研究了部件关键力学参数(刚度和阻尼系数)随环境因素的变化关系,并对其运动和受力进行了分析。通过不同参数的装配得到四种阻尼器的功能匹配点,其中三种变结构阻尼器。分析了两种节流孔和毛细管中不同的预置力、流体温度和结构参数对阻尼器刚度和阻尼系数的影响。通过实验建模,得到了非典型孔节流形式的交通模型。针对这三种变结构阻尼器,从功能特点、应用对象、工况、安装布置方式等方面探讨了其在工程中的应用。该研究为低失效概率、高可靠度变结构阻尼器的研制和应用提供了理论支持。
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