Wei Lu, Chen Yanan, Hu Junjie, Hu Xueao, Qiu Yunlong, Li Kai
School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China.
Polymers (Basel). 2024 Aug 9;16(16):2263. doi: 10.3390/polym16162263.
The self-excited oscillation system, owing to its capability of harvesting environmental energy, exhibits immense potential in diverse fields, such as micromachines, biomedicine, communications, and construction, with its adaptability, efficiency, and sustainability being highly regarded. Despite the current interest in track sliders in self-vibrating systems, LCE fiber-propelled track sliders face significant limitations in two-dime nsional movement, especially self-rotation, necessitating the development of more flexible and mobile designs. In this paper, we design a spatial slider system which ensures the self-rotation of the slider propelled by a light-fueled LCE fiber on a rigid circular track. A nonlinear dynamic model is introduced to analyze the system's dynamic behaviors. The numerical simulations reveal a smooth transition from the static to self-rotating states, supported by ambient illumination. Quantitative analysis shows that increased light intensity, the contraction coefficient, and the elastic coefficient enhance the self-rotating frequency, while more damping decreases it. The track radius exhibits a non-monotonic effect. The initial tangential velocity has no impact. The reliable self-rotating performance under steady light suggests potential applications in periodic motion-demanding fields, especially in the construction industry where energy dissipation and utilization are of utmost urgency. Furthermore, this spatial slider system possesses the ability to rotate and self-vibrate, and it is capable of being adapted to other non-circular curved tracks, thereby highlighting its flexibility and multi-use capabilities.
自激振荡系统由于其能够收集环境能量，在微机械、生物医学、通信和建筑等多个领域展现出巨大潜力，其适应性、效率和可持续性备受关注。尽管目前对自振系统中的轨道滑块很感兴趣，但基于液晶弹性体（LCE）纤维驱动的轨道滑块在二维运动，特别是自转方面存在重大限制，因此需要开发更灵活、可移动的设计。在本文中，我们设计了一种空间滑块系统，该系统可确保由光驱动的LCE纤维推动的滑块在刚性圆形轨道上自转。引入了非线性动力学模型来分析系统的动态行为。数值模拟显示，在环境光照的支持下，系统能从静态平稳过渡到自转状态。定量分析表明，光强度、收缩系数和弹性系数的增加会提高自转频率，而更多的阻尼会降低自转频率。轨道半径呈现非单调效应。初始切向速度没有影响。在稳定光照下可靠的自转性能表明其在需要周期性运动的领域具有潜在应用，特别是在能量耗散和利用最为紧迫的建筑行业。此外，这种空间滑块系统具有旋转和自振的能力，并且能够适应其他非圆形弯曲轨道，从而突出了其灵活性和多用性。
