张力弦-永磁动力吸振器理论及试验研究

摘要 为了实现转子系统振动抑制，设计了一种适用于旋转机械的张力弦-永磁刚度动力吸振器.利用张力弦结构的拉力-刚度可调特性，实现吸振器的频率可调;又引入永久磁铁构成的刚度机构，使得吸振器整体结构与转子系统相互分离.对转子-动力吸振器系统进行动力学建模和仿真分析，研究了吸振器的工作特性，又进行试验研究证明理论研究的正确性.研究结果表明，该吸振器可以达到转子系统振动抑制的效果，在永磁刚度机构磁铁间距小时吸振器效果好且更加稳定.
Abstract：In order to eliminate the vibration of the rotor system， a tension string-permanent magnet dynamic vibration absorber is designed for the rotating machinery. The frequency adjustability of the vibration absorber is realized by using the adjustable tension-stiffness feature of the tension string， and the structure of the vibration absorber is separated from the rotor system by a stiffness institution which is made with permanent magnets. In this paper， the dynamical model and the simulation analysis of the rotor-dynamic vibration absorber is built，the operating characteristic of the vibration absorber is studied， and the correctness of the theoretical research is proved by the experimental study. The results proved that the vibration absorber has good effect on eliminating the vibration of the rotor system， and the absorbing function becomes better and more stable as the inter-distance of the magnets is set closer.