Toward a design methodology for particle dampers by analyzing their energy dissipation
Toward a design methodology for particle dampers by analyzing their energy dissipation
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DOI：
10.1007/s40571-020-00363-0
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发表时间：
2020-09-15
影响因子：
3.3
通讯作者：
Seifried, Robert
中科院分区：
文献类型：
--
作者：
Meyer, Niklas;Seifried, Robert
颗粒阻尼器显示出巨大的潜力，以减少不必要的振动，即使在恶劣的环境条件下的技术应用。然而，它们的能量耗散取决于微观和宏观尺度上的许多效应，这些效应尚未完全理解。本文旨在通过两个尺度来发展颗粒阻尼器的设计规则。这将缩短未来应用的设计过程。通过大激励范围内的复功率分析了不同结构的能量耗散和损耗因子。离散元模拟的比较表明，一个很好的定性协议。这些模拟提供了一个深入了解的过程中的阻尼器。对于单分散体系，损耗因子与流变行为的运动模式直接相关。对于众所周知的激励条件，简单的设计规则。多分散设置的第一次调查，表现出更强大的阻尼行为的潜力。
Particle dampers show a huge potential to reduce undesired vibrations in technical applications even under harsh environmental conditions. However, their energy dissipation depends on many effects on the micro- and macroscopic scale, which are not fully understood yet. This paper aims toward the development of design rules for particle dampers by looking at both scales. This shall shorten the design process for future applications. The energy dissipation and loss factor of different configurations are analyzed via the complex power for a large excitation range. Comparisons to discrete element simulations show a good qualitative agreement. These simulations give an insight into the process in the damper. For monodisperse systems, a direct correlation of the loss factor to the motion modes of the rheology behavior is shown. For well-known excitation conditions, simple design rules are derived. First investigations into polydisperse settings are made, showing a potential for a more robust damping behavior.