纳米间隙气膜润滑动态承载特性研究

项目名称： 纳米间隙气膜润滑动态承载特性研究

项目编号： No.51275279

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 史宝军

作者单位： 山东建筑大学

项目金额： 80万元

中文摘要： 在微/纳米机电系统(MEMS/NEMS)中，存在着大量的微纳米间隙气体润滑问题，由于尺度效应的影响，人们对其非常规物理机制的认识和理解远远不够，这已成为制约MEMS/NEMS 设计制造和应用水平提高的重要瓶颈。本项目以纳米间隙气体润滑问题为主要研究和应用对象，采取理论分析、动力学建模、数值模拟与实验研究相结合的研究方案，基于分子动力学、纳米摩擦学、纳米力学的基本理论，考虑气体稀薄、表面粗糙度等纳米尺度效应，建立纳米间隙气膜动态润滑方程新模型；以无网格法等为主要数值模拟分析方法，研究具有高速相对运动的纳米间隙气膜在界面约束作用下的动态承载特性问题；揭示气体稀薄、表面粗糙度等纳米尺度效应对纳米间隙气膜动态承载特性的影响规律及其润滑机理，探索提高其动态承载能力和飞行稳定性的途径与方法，丰富和发展纳米摩擦学的薄膜润滑理论及其跨尺度模拟算法，为此类纳米间隙气膜的设计与制造提供理论基础。

中文关键词： 气膜润滑；纳米间隙；动态承载特性；无网格法；

英文摘要： In micro / nano-electromechanical systems (MEMS/NEMS), there are a lot of gas film lubrication problems with micro-nano spacing interface. Due to the scale effect, its physical mechanisms are far enough to be understood, which has been an important bottleneck and has restricted the design, manufacture, and application of MEMS/NEMS. In this project, the gas film lubrication problem with nano-spacing is the main research and application object. A research programme of theoretical analysis, dynamic modelling, numerical simulation and experimental techniques will be adopted. Based on molecular dynamics, nano-tribology and nano-mechanics, a new dynamic model of gas film lubrication equation considering the gas rarefaction and surface roughness effects will be developed. By using a meshless method, the dynamic loading characteristics of the gas film with nano-spacing in a interface-constraint condition will be investigated. We try to reveal effects of gas rarefaction and surface roughness on the dynamic loading characteristics of gas film lubrication, to explore possible methods of improving the dynamic carrying capacity and flying stability of a slider, and to develop the thin film lubrication theory of nano-tribology and its cross-scale simulation algorithm and to provide a theoretical basis for the design and manuf

英文关键词： Gas film lubrication；nano-spacing;；dynamic loading characteristics；meshless method；