Bearing as an important machine element is widely used for industrial and automotive applications. At certain operational speed, bearings induce disturbing vibrations and noises that affect machine service life, productivity and passenger comfort in case of vehicle applications. Dissipative elastic metamaterials have caught considerable attention of scientific community due to their effective medium properties and peculiar dynamic characteristics including frequency bandgaps that can be effectively applied to attenuate and control undesirable vibration and noises. Although a substantial amount of theoretical work for effective medium characteristics and dynamic properties of acoustic/elastic metamaterials has been reported, the practical design and application of these composite structures for real-life engineering problems still remain unexplored. The present study intends to investigate a potential application of dissipative elastic metamaterials in controlling the bearing-generated vibration and noises over an ultrawide frequency range. The study is based on a simple analytical model together with rigorous finite element numerical simulations. It has been established that the dissipative characteristic of resonant system caused by larger material mismatch broadens the local resonance bandgaps beyond the bounding resonance frequency at the cost of wave transmission. In order to achieve broadband vibration and noise control, multi-resonant composite structures are embedded inside the bearing housing in five different layers. The reported results revealed the presence of broadband wave attenuation zone distributed from 3 to 52 kHz with consideration of material damping. The bearing-generated vibration and noises lying inside the wave attenuation zone will be mitigated. This feasibility study provides a new concept for the design and application of acoustic/elastic metamaterials in the bearing industry to improve machine service life and to enhance productivity and passenger comfort.

轴承作为重要的机械元件广泛用于工业和汽车应用。在某些运行速度下，轴承会产生干扰性的振动和噪声，从而影响车辆的使用寿命，生产率和乘客舒适度。耗散弹性超材料由于其有效的介质特性和独特的动态特性（包括可以有效地衰减和控制不良振动和噪声的频带隙）而引起了科学界的广泛关注。尽管已报道了大量有关声/弹性超材料的有效介质特性和动力学特性的理论研究，但这些复合结构在实际工程中的实际设计和应用仍未探索。本研究旨在研究耗散弹性超材料在控制轴承产生的超宽频率范围内的振动和噪声方面的潜在应用。该研究基于简单的分析模型以及严格的有限元数值模拟。已经确定，由较大的材料失配引起的共振系统的耗散特性使局部共振带隙扩大到超过共振频率上限，但以波传输为代价。为了实现宽带振动和噪声控制，将多共振复合结构分为五个不同层嵌入轴承箱内部。报告的结果表明，考虑到材料阻尼，宽带波衰减区的分布范围为3至52 kHz。位于波衰减区内的轴承产生的振动和噪声将得到缓解。这项可行性研究为轴承行业中的声学/弹性超材料的设计和应用提供了新的概念，以延长机器使用寿命并提高生产率和乘客舒适度。