用二硫化钼石墨填充聚四氟已烯摩擦学特性的研究

在干摩擦状态下,对用二硫化钼、石墨填充至聚四氟已烯中所组成的复合材料进行了摩擦磨损特性的研究.通过试验分析得知填料减磨的主要机理,是由于在摩擦表面上存在转移膜以及填料具有的自润滑特性,使得对磨时与纯聚四氟已烯相比摩擦系数降低、耐磨性提高     

实验建模方法在金属橡胶隔振系统分析中的应用

本文结合金属橡胶隔振系统的性能特点，利用静态实验数据建立数学模型，求解隔振系统的运动微分方程，并根据方程的数值解分析金属橡胶隔振系统的动静态特性，该建模方法减少了理论误差，提高了建模业度，为金属橡胶隔振系统的动静态特性研究提出了一种新思路。     

面向微系统的介电泳力微纳粒子操控研究

微系统中低浓度微纳粒子的操控技术亟需改进和完善,介电泳（dielectrophoresis） 在这一领域具有很大的潜力. 以介电泳基本原理分析为基础,推导了介电泳力的复数表达式. 综合分析了影响传统介电泳力和行波介电泳力的主要因素,并建立星型电极和平行电极阵列的二维理论模型,分别作为传统介电泳力和行波介电泳力的微纳粒子操控结构. 设置相应的边界条件,利用实部、虚部耦合求解的方法,仿真计算两种电极上的介电泳力分布规律,为实验提供参数依据. 以传统介电泳力为基础,利用星型电极进行微纳粒子收集实验;以行波介电泳 关键词： 微系统 介电泳 粒子收集 定向驱动     

Lubricant film flow and depletion characteristics at head/disk storage interface

The characteristics of lubricant film at head/disk interface(HDI) are essential to the stability of hard disk drives. In this study, the theoretical models of the lubricant flow and depletion are deduced based on Navier–Stokes(NS) and continuity equations. The air bearing pressure on the surface of the lubrication film is solved by the modified Reynolds equation based on Fukui and Kaneko(FK) model. Then the lubricant film deformations for a plane slider and double-track slider are obtained. The equation of lubricant film thickness is deduced with the consideration of van der Waals force, the air bearing pressure, the surface tension, and the external stresses. The lubricant depletion under heat source is simulated and the effects of different working conditions including initial thickness, flying height and the speed of the disk on lubricant depletion are discussed. The main factors that cause the lubricant flow and depletion are analyzed and the ways to reduce the film thickness deformation are proposed. The simulation results indicate that the shearing stress is the most important factor that causes the thickness deformation and other terms listed in the equation have little influence. The thickness deformation is dependent on the working parameter, and the thermal condition evaporation is the most important factor.     

环形金属橡胶隔振器系统建模与实验研究

以航空发动机导线插头支座用环形金属橡胶隔振器的具体需求为背景,对环形金属橡胶隔振器进行了建模与实验研究.借助于动力学原理和迟滞理论,建立了隔振器的振动系统模型,并对模型中的参数进行了讨论,得出环形金属橡胶隔振器的动态频响特性.利用静态实验对不同初始变形时环形隔振器的局部刚度特性进行了分析,并通过动态实验对环形隔振器的动态频响特性进行了验证.结果表明,该隔振器具有独特的刚度和阻尼特性,其初始变形对隔振器固有频率和传递率具有较大影响.图7,表1,参11.