轻质高速复合材料传动轴转子系统非线性振动与材料内阻失稳

项目名称： 轻质高速复合材料传动轴转子系统非线性振动与材料内阻失稳

项目编号： No.11272190

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 任勇生

作者单位： 山东科技大学

项目金额： 78万元

中文摘要： 复合材料传动轴（CDS）转子系统在超临界转速下的动力稳定性与非线性振动是发展现代直升机、汽车亟待解决的问题。迄今为止，国内外尚未就CDS转子系统的非线性振动及其内阻失稳机理，提出完整的理论研究体系。本项目拟针对几何非线性CDS转子系统，以揭示复合材料内阻对CDS转子系统动力学行为的影响，建立科学的复合材料内阻失稳预测方法为目标，以先进复合材料薄壁结构非线性理论、非线性振动理论以及细观阻尼理论等学科方法为指导，重点就CDS转子系统模态阻尼、失稳阈、非线性振动响应建模和模型缩聚技术、特征值技术、时/频域算法、复合材料内阻细观估计原理，以及叠层方式、细观特征、温度和频率、含夹层等重要因素对CDS转子系统稳定性与非线性动力学行为的影响，进行系统的研究；针对CDS转子系统非线性振动内阻失稳理论体系，提出科学完整表征方法与评价技术，为最终实现CDS转子系统的动力稳定设计与非线性振动控制，奠定基础。

中文关键词： 复合材料传动轴；材料内阻；非线性振动；动力学稳定性；转子动力学

英文摘要： The dynamic stability and nonlinear vibration of composite drive shaft (CDS) rotor system operated in the supercritical range are an urgent problem in developments of advaced helicopter and automotive. So far, no complete framework for the theoretical research on nonlinear vibration and dynamic instability due to internal damping of CDS rotor system has been constructed. The project is aimed at the CDS rotor system with geometric nonlinear, the research objectives are to gain an insight into the effects of composite internal damping on the dynamic behavior of CDS rotor system and develop the scientific method of predicting destabilizations induced by internal damping. On the basis of advanced nonlinear structural theory of composite thin-walled beam, nonlinear vibration theory and micro composite damping mechanical model, the key issues under consideration in the project are : 1.Accurate prediction of model damping, instability thresholds and nonlinear vibration response of CDS rotor system by means of the analytical technologies presented by the project, which includes model reducing, eigenvalue analysis, time/frequency methods and miro mechanical evaluation theory for composite internal damping. 2.The effects of stacking sequence, miro mechanical characteristics, sandwich, temperature and frequency on the stab

英文关键词： composite drive shaft；internal material damping；nonlinear vibration；dynamic stability；rotordynamics