柔性结构重复撞击的研究

项目名称： 柔性结构重复撞击的研究

项目编号： No.10872095

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 尹晓春

作者单位： 南京理工大学

项目金额： 35万元

中文摘要： 柔性结构重复撞击系统是典型的跨时间尺度变拓扑系统。本申请课题拟尽可能选择更多的柔性结构重复撞击系统作为研究对象，从理论分析、数值计算和实验测量三个方面入手，考虑重复撞击的瞬态波效应，研究重复撞击力响应、重复次撞击力响应、结构瞬态应力响应、结构瞬态变形响应，以及重复撞击下系统的长期动力学行为，探索重复撞击现象的基本规律，为有效控制重复撞击，减轻疲劳破坏程度，减少磨损量，抑制高幅振动和降低噪声，以及提高对结构系统性能的控制能力，提供一定的科学研究基础。

中文关键词： 柔性结构；重复撞击；应力波；瞬态响应；实验研究

英文摘要： A repeated system of flexible structures is a typical multi-time scale system with variable topology. The present project investigates the different selected repeated systems of flexible structures as many as possible. By the use of the theoretical analysis, numerical computation and experimental measuremnt, the repeated impact-induced transient wave effect, the response of repeated impacted forces, the response of repeated sub-impact forces, the transient stress and deformation responses and the long term dynamics behavior under repeated impacts are investigated. The substaintial characteristics of the repeated impacts phenomenon are explored. The presnet investigation will provide some scientific research foundations for controlling repeted impacts, lightening fatigue and wear due to repeated impacts, reducing high vibration and noise and improving the controlling ability on the performance of the flexible structure system.

英文关键词： flexible structure; repeated impacs; stress wave; transient response; experiment