Avdić Sanel, Nagode Marko, Klemenc Jernej, Oman Simon
Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva Cesta 6, 1000 Ljubljana, Slovenia.
Polymers (Basel). 2024 May 19;16(10):1440. doi: 10.3390/polym16101440.
Due to their advantages-longer internal force delay compared to bulk materials, resistance to harsh conditions, damping of a wide frequency spectrum, insensitivity to ambient temperature, high reliability and low cost-granular materials are seen as an opportunity for the development of high-performance, lightweight vibration-damping elements (particle dampers). The performance of particle dampers is affected by numerous parameters, such as the base material, the size of the granules, the flowability, the initial prestress, etc. In this work, a series of experiments were performed on specimens with different combinations of influencing parameters. Energy-based design parameters were used to describe the overall vibration-damping performance. The results provided information for a deeper understanding of the dissipation mechanisms and their mutual correlation, as well as the influence of different parameters (base material, granule size and flowability) on the overall damping performance. A comparison of the performance of particle dampers with carbon steel and polyoxymethylene granules and conventional rubber dampers is given. The results show that the damping performance of particle dampers can be up to 4 times higher compared to conventional bulk material-based rubber dampers, even though rubber as a material has better vibration-damping properties than the two granular materials in particle dampers. However, when additional design features such as mass and stiffness are introduced, the results show that the overall performance of particle dampers with polyoxymethylene granules can be up to 3 times higher compared to particle dampers with carbon steel granules and conventional bulk material-based rubber dampers.
由于颗粒材料具有一些优势，如与块状材料相比具有更长的内力延迟、耐恶劣条件、宽频谱阻尼、对环境温度不敏感、高可靠性和低成本，因此被视为开发高性能、轻质减振元件（颗粒阻尼器）的一个契机。颗粒阻尼器的性能受众多参数影响，如基体材料、颗粒尺寸、流动性、初始预应力等。在这项工作中，对具有不同影响参数组合的试样进行了一系列实验。基于能量的设计参数被用来描述整体减振性能。这些结果为更深入地理解耗散机制及其相互关系，以及不同参数（基体材料、颗粒尺寸和流动性）对整体阻尼性能的影响提供了信息。文中给出了碳钢颗粒和聚甲醛颗粒的颗粒阻尼器与传统橡胶阻尼器性能的比较。结果表明，颗粒阻尼器的阻尼性能比传统块状材料基橡胶阻尼器高出4倍，尽管橡胶作为一种材料的减振性能比颗粒阻尼器中的两种颗粒材料更好。然而，当引入质量和刚度等附加设计特征时，结果表明，聚甲醛颗粒的颗粒阻尼器的整体性能比碳钢颗粒的颗粒阻尼器和传统块状材料基橡胶阻尼器高出3倍。
