旋转碳纤维复合材料轴转子动力学特性的有限元分析与试验研究

Finite-element analysis and experimental research on rotating CFRP shaft’s rotor dynamic characteristics

轻质、高速旋转复合材料传动轴是航空和汽车领域先进传动系统设计中的关键部件。文中基于锤击激振测试方法和ANSYS有限元软件,对旋转复合材料轴进行转子动力学系统试验测试和有限元建模与分析,研究旋转碳/树脂复合材料轴的转子动力学特性。结果表明:铺层方式对旋转复合材料轴的转子动力学特性有重要的影响,纤维铺设角越小,临界转速和涡动频率越高;随着纤维铺设角的增大,临界转速和涡动频率降低。有限元仿真结果与转子动力学试验结果较为吻合,理论模型基本可靠。

The light-weight and high-speed rotating composite transmission shaft is a crucial part of the advanced transmission system in the aviation and automotive industry.In this article,based on the hammer-excitation test and the ANSYS finite-element software,the rotating composite shaft's rotor dynamic characteristics are subject to the test as well as the finite-element modeling and analysis,and efforts are made to explore the rotor dynamic characteristics of the rotating carbon/resin composite shaft.The results show that the laying method has an important impact on the rotating composite shaft's rotor dynamic characteristics.The smaller the fiber laying angle is,the greater the critical rotating speed and the whirl frequency will be.With the ever-growing fiber laying angle,both the critical rotating speed and the whirl frequency will decrease.The results obtained from finite-element simulation are in good agreement with those obtained from the experiment on the rotor dynamics,and the theoretical model is fairly reliable.