考虑运动副间隙与摩擦磨损效应的柔性航天机构耦合动力学研究

项目名称： 考虑运动副间隙与摩擦磨损效应的柔性航天机构耦合动力学研究

项目编号： No.51305093

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 白争锋

作者单位： 哈尔滨工业大学

项目金额： 25万元

中文摘要： 运动副间隙和摩擦磨损是引起机械设备性能和可靠性下降的主要因素之一，对于长寿命航天器而言，该问题显得尤为重要。针对机构运动副普遍存在间隙、摩擦磨损现象，以长寿命航天器星载天线驱动机构为对象，在研究含间隙运动副接触碰撞以及摩擦磨损机理和描述的基础上，将摩擦磨损集成到多体系统动力学中，建立含摩擦磨损和运动副间隙的复杂柔性多体系统动力学耦合模型，通过理论与实验相结合的方法，系统地研究机构随运动副磨损间隙变化的长期非线性动力学特性，进一步分析运动副间隙对系统动态行为的作用机理以及含间隙运动副摩擦磨损和动力学行为的交互耦合机制，真实地反映考虑运动副间隙、摩擦磨损和构件柔性的航天机构动力学性能。本项目的研究将柔性多体系统动力学与摩擦学有机结合，拓展了柔性多体系统动力学的研究领域，为机械设备系统的动态性能分析与评估提供科学的理论和方法。

中文关键词： 间隙；摩擦磨损；接触碰撞；柔性多体系统；动力学

英文摘要： Clearance, friction and wear in joint are main factors that cause the performance and reliability decline of mechanical systems. It is more important to long-life spacecraft. For clearance and wear always exist in joints of mechanism, the drive mechanism of long-life spacecraft antenna is used as the application object. Base on the theory and description investigation of contact and wear in clearance joint, the wear model is integrated into multi-body system dynamics. The coupling dynamics model of flexible multi-body system including wear and clearance is established. Then the long-term nonlinear dynamic characteristics of mechanism with the changes of wear clearance are studied. Further, the influence mechanism of clearance on the dynamic performances is investigated and the coupling influences between wear and dynamics responses are analyzed. Thus, the dynamics performances of space mechanism considering clearance, friction, wear and flexible bodies are reflected truly. The research of this project combines flexible multi-body system dynamics and tribology effectively, which expands the research area of flexible multi-body system dynamics and provides scientific theory and method for dynamics performance analysis and evaluation of mechanical systems.

英文关键词： Clearance；Friction and wear；Contact and impact；Flexible multibody system；Dynamics