Article
Engineering, Mechanical
Yingli Li, Xiaohong Dong, Hao Li, Song Yao
Summary: This paper proposes elastic metamaterials with multi-degree-of-freedom hybrid resonators to achieve lower and wider bandgaps for vibration attenuation. It analyzes the central frequencies expressions of the bandgaps and explores the bandgap forming mechanism using dispersion curves and relative movement of masses. The proposed models show lower central frequencies or significantly widened bandgap widths compared to classical models.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
Weifeng Jiang, Ming Yin, Qihao Liao, Luofeng Xie, Guofu Yin
Summary: This study introduces a class of 3D single-phase elastic metamaterials exhibiting both locally resonant and Bragg scattering bandgaps, which can overlap to form an ultra-wide vibration attenuation frequency range. The results are verified experimentally using additive manufacturing, suggesting a feasible approach for realizing elastic metamaterials for engineering application.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Engineering, Mechanical
Faisal Jamil, Fei Chen, Bolei Deng, Robert G. Parker, Pai Wang
Summary: We reveal the unique and fundamental advantage of inerter-based elastic metamaterials through a comparative study among different configurations. The metamaterial shows definite superiority in forming a band gap in the ultra-low frequency regime, where the unit cell size can be four or more orders of magnitude smaller than the operating wavelength. Parametric studies in both one and two dimensions pave the way towards designing next-generation metamaterials for structural vibration mitigation.
EXTREME MECHANICS LETTERS
(2022)
Article
Chemistry, Physical
Jing Zhao, Zhixin Ma, Yiyang Hu, Jiacheng Zeng, Yuxin Xu, Jie Deng, Nansha Gao
Summary: This paper aims to improve the low-frequency performance of Acoustic black hole (ABH) plates through the design of a metamaterial acoustic black hole (MMABH) plate. The MMABH plate consists of a double-layer ABH plate with periodic local resonators installed between the layers. The resonators are tuned to the low-frequency peak points of the ABH plate, and the beams are covered with damping layers to dissipate vibration energy. Modal analysis confirms the MMABH plate's damping effect at low frequencies over a wide frequency band.
Article
Physics, Applied
Di Mu, Keyi Wang, Haisheng Shu, Jiahao Lu
Summary: This paper proposes two improved elastic metamaterials (EMs) with lower starting frequencies and larger bandwidths by introducing two-stage inertial amplification structures and introducing structures and elastic foundations simultaneously. The research provides important guidance for the control and utilization of low and ultra-low frequency vibration in engineering applications and the regulation of low and ultra-low frequency broadband elastic waves in scientific research related functional devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hong-yun Yang, Shu-liang Cheng, Xiao-feng Li, Qun Yan, Bin Wang, Ya-jun Xin, Yong-tao Sun, Qian Ding, Hao Yan, Ya-jie Li, Qing-xin Zhao
Summary: This paper proposes an innovative star-shaped hybrid metamaterial structure with low-frequency band gap. Through the establishment of a dynamic model, the band gap characteristics and propagation properties of the structure are analyzed. The results show that the proposed structure has good band gap characteristics in the frequency range of 1000 Hz, with the lowest band gap frequency reaching 60.207 Hz and the total band gap width accounting for 54.463%. This research opens up new possibilities for the design of low-frequency metamaterial structures.
MATERIALS & DESIGN
(2023)
Article
Acoustics
Xingzhong Wang, Yatong Pang, Jiu Hui Wu, Fuyin Ma
Summary: This paper proposes a broadband damping method that achieves broadband vibration absorption by superposition of the working bands of several damping units. The device consists of several local resonant metamaterial dampers with gradient elastic wave band gaps via weak coupling. By integrating the units with band gaps in different frequency ranges in parallel, a linear superposition of the absorption bandwidth can be achieved. This design overcomes the limitations of traditional dynamic vibration absorbers (DVAs) or metamaterial dampers with narrow working bands and provides a solution for broadband low-frequency vibration attenuation.
Article
Engineering, Mechanical
Di Mu, Keyi Wang, Haisheng Shu, Jiahao Lu
Summary: In this study, a novel local resonant metamaterial (LRM) beam with elastic foundation is proposed and its bandgap characteristics and the effects of structural parameters are investigated. Experimental results validate the theoretical findings, and three methods for bandgap widening are proposed. This research provides guidance for low and ultra-low frequency broadband flexural waves and vibration control.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Xiaofan Wang, Haojie Chen, Yuhang Yin, Yongdu Ruan, Shan Zhu, Chuanjie Hu, Huanyang Chen
Summary: A multiband elastic waveguide cloak that utilizes metamaterials is introduced for controlling vibration intensity. By converting flexural waves to waveguide-trapped waves, a cloaking region with negligible vibration is created, providing a new approach to modulating elastic waves. The design has a compact structure, exhibits multiband performance, and is highly suitable for vibration control in various scenarios.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Muhammad, C. W. Lim, N. S. Vyas
Summary: The study investigates the potential application of dissipative elastic metamaterials in controlling bearing-generated vibration and noises over an ultrawide frequency range. By embedding multi-resonant composite structures inside the bearing housing, the study successfully reveals the presence of a broadband wave attenuation zone from 3 to 52 kHz, mitigating the vibration and noise generated by the bearing.
ACTA MECHANICA SOLIDA SINICA
(2021)
Article
Engineering, Civil
Patricia N. Dominguez, Victor H. Cortinez, Marcelo T. Piovan
Summary: This paper presents a study on flexural-torsional vibrations of finite beams with a large number of periodically attached resonators. The focus is on determining bandgaps, which are frequency ranges without resonances. A modified Vlasov theory is used as the structural model, incorporating the resonator effect through sectional inertial properties. Analyzing these properties reveals the mechanism of weak and strong bandgap formation. Analytical formulas for the edge frequencies of bandgaps are derived, and an exact analytical solution for the free and forced vibration of simply supported beams is presented.
THIN-WALLED STRUCTURES
(2022)
Article
Optics
Fengqing Yang, Juan Song, Zhiwei Guo, Xian Wu, Kejia Zhu, Jun Jiang, Yong Sun, Haitao Jiang, Yunhui Li, Hong Chen
Summary: This research focuses on designing and implementing robust long-range directional wireless power transfer, utilizing tools provided by topological photonics for near-field control of WPT. By designing a one-dimensional quasiperiodic Harper chain and introducing a power source, successful long-range directional WPT was achieved. By adding variable capacitance diodes, an experimental demonstration of actively controlled directional WPT based on electrically controllable coil resonators was realized.
Article
Engineering, Multidisciplinary
Yi-Chen Zhu, Sergio Cantero Chinchilla, Han Meng, Wang-Ji Yan, Dimitrios Chronopoulos
Summary: Resonant metamaterials have been widely studied in mechanical and acoustic engineering for their applications in sound and vibration control. However, the issue of local damage in resonating parts hinders their industrial application. This work presents a study on quantifying and identifying damaged oscillators in a resonant metamaterial using measured frequency response function (FRF) data. Both data-driven and physics-based methods are implemented and the impact of manufacturing-induced structural uncertainty is considered. The proposed methodologies provide probabilistic estimation indices for damage level and location.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Acoustics
Andre A. T. Brandao, Aline S. de Paula, Adriano T. Fabro
Summary: In recent years, the study of metastructures for vibration control has gained attention. However, there is a lack of application in rotating machines. This study investigates the use of locally resonant metastructures for vibration attenuation in rotating machines. The results suggest that this method can be effectively applied for vibration control in rotors, paving the way for further engineering solutions.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Chemistry, Analytical
Romolo Marcelli, Giovanni Maria Sardi, Emanuela Proietti, Giovanni Capoccia, Jacopo Iannacci, Girolamo Tagliapietra, Flavio Giacomozzi
Summary: This study investigates the potential applications of triangular resonators with Sierpinski geometry in the K-Band, particularly in radar and satellite communications. The resonance frequency of the resonators can be tuned by increasing their internal complexity, and coupling structures can enhance the resonance response.
