Ding Wei, Wang Leizhi, Chen Zhaobo, Ao Hongrui, Yan Hui
School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel). 2024 Jul 5;17(13):3330. doi: 10.3390/ma17133330.
This paper introduces an electromagnetic structure utilizing the controllable mechanical properties of magnetorheological elastomer (MRE) materials through magnetic flux. An adaptive elastic foundation composed of these materials is explored for vibration reduction and frequency modulation. This study investigates these effects using both a single-mass model and a coupled human-seat model. For objects supported by the adaptive elastic foundation, increasing the magnetic flux enhances the stiffness and damping, thereby significantly reducing the peak response while slightly increasing the resonance frequency. Strategies such as increasing the magnetic flux, reducing the object mass, and minimizing the system's degrees of freedom and internal damping contribute to enhancing the vibration reduction and frequency modulation in the adaptive elastic foundation. The simulation results indicate that for a seated human (weighing between 72.4 kg and 88.4 kg), the adaptive elastic foundation reduces the head peak response by approximately 15.7% and increases the resonance frequency by approximately 3.4% at a magnetic flux of 138 mT.
本文介绍了一种电磁结构，该结构利用磁流变弹性体（MRE）材料通过磁通量实现可控的力学性能。研究了由这些材料组成的自适应弹性基础在减振和调频方面的应用。本研究使用单质量模型和人椅耦合模型对这些效果进行了研究。对于由自适应弹性基础支撑的物体，增加磁通量会提高刚度和阻尼，从而显著降低峰值响应，同时略微提高共振频率。增加磁通量、减轻物体质量、最小化系统自由度和内部阻尼等策略有助于增强自适应弹性基础的减振和调频效果。仿真结果表明，对于坐姿人体（体重在72.4 kg至88.4 kg之间），在138 mT的磁通量下，自适应弹性基础可使头部峰值响应降低约15.7%，并使共振频率提高约3.4%。
