Song Bo, Shi Jiao, Wang Jinbao, Shen Jianhu, Cai Kun
College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, China.
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China.
Sensors (Basel). 2020 Apr 1;20(7):1969. doi: 10.3390/s20071969.
It was discovered that large-amplitude axial oscillation can occur on a rotor with an internally hydrogenated deformable part (HDP) in a rotation-translation nanoconverter. The dynamic outputs of the system were investigated using molecular dynamics simulations. When an input rotational frequency (100 GHz > > 20 GHz) was applied at one end of the rotor, the HDP deformed under the centrifugal and van der Waals forces, which simultaneously led to the axial translation of the other end of the rotor. Except at too high an input rotational frequency (e.g., >100 GHz), which led to eccentric rotation and even collapse of the system, the present system could generate a periodic axial oscillation with an amplitude above 0.5 nm at a temperature below 50 K. In other ranges of temperature and amplitude, the oscillation dampened quickly due to the drastic thermal vibrations of the atoms. Furthermore, the effects of the hydrogenation scheme and the length of HDP on the equilibrium position, amplitude, and frequency of oscillation were investigated. The conclusions can be applied to the design of an ideal nano-oscillator based on the present rotation-translation converter model.
研究发现，在旋转-平移纳米转换器中，带有内部氢化可变形部件（HDP）的转子上会出现大幅度轴向振荡。利用分子动力学模拟研究了该系统的动态输出。当在转子一端施加输入旋转频率（100 GHz >> 20 GHz）时，HDP在离心力和范德华力作用下发生变形，这同时导致转子另一端的轴向平移。除了在过高的输入旋转频率（例如，>100 GHz）下会导致系统偏心旋转甚至崩溃外，本系统在温度低于50 K时能够产生幅度高于0.5 nm的周期性轴向振荡。在其他温度和幅度范围内，由于原子的剧烈热振动，振荡会迅速衰减。此外，还研究了氢化方案和HDP长度对平衡位置、振幅和振荡频率的影响。这些结论可应用于基于当前旋转-平移转换器模型的理想纳米振荡器的设计。
