A5020787026- Acoustic Wave Phenomena Research
- Metamaterials and Metasurfaces Applications
- Topological Materials and Phenomena
- Quantum Mechanics and Non-Hermitian Physics
- Aerodynamics and Acoustics in Jet Flows
- Solar Thermal and Photovoltaic Systems
- Ultrasonics and Acoustic Wave Propagation
- Mechanical and Optical Resonators
- Noise Effects and Management
- Antenna Design and Analysis
- Heat Transfer and Boiling Studies
- Nonlinear Photonic Systems
- Heat Transfer Mechanisms
- Acoustic Wave Resonator Technologies
- Railway Engineering and Dynamics
- Advanced Antenna and Metasurface Technologies
- Underwater Acoustics Research
- Vehicle Noise and Vibration Control
- Speech and Audio Processing
- Quantum chaos and dynamical systems
- Wind and Air Flow Studies
- Seismic Waves and Analysis
- Cellular and Composite Structures
- Hearing Loss and Rehabilitation
- Thermal Radiation and Cooling Technologies
East China University of Science and Technology
2024-2025
Xi'an Aeronautical University
2022-2024
Tongji University
2014-2024
Weinan Normal University
2024
Analysis and Testing Centre
2024
Daqing Oilfield General Hospital
2024
Xi'an Shiyou University
2024
First People's Hospital of Foshan
2024
University of Science and Technology Beijing
2024
Centre de Nanosciences et de Nanotechnologies
2023
Lattice structures are featured by their extraordinary mechanical performances in specific stiffness, strength, energy absorption, and sound etc. The recent trend of multifunctionality engineering applications has raised new requirements for the integration acoustic properties. In this paper, a multifunctional hybrid plate lattice structure denoted as SBHP is proposed hybridizing traditional body-centered cubic (BCCP) simple (SCP) structures, its absorption properties investigated...
Phononic crystals and acoustic metamaterials are periodic structures whose effective properties can be tailored at will to achieve extreme control on wave propagation. Their refractive index is obtained from the homogenization of infinite system, but it possible locally change a finite crystal in such way that results an gradient (GRIN). In case propagation waves accurately described by means ray theory, different devices designed framework inhomogeneous media. this paper we review have been...
We investigate the properties of a phononic crystal plate with hollow pillars and introduce existence whispering-gallery modes (WGMs). show that by tuning inner radius pillar, these can merge inside both Bragg low frequency band gaps, deserving acoustic metamaterial applications. These be used as narrow pass bands for which quality factor greatly enhanced introduction an additional cylinder between plate. discuss some functionalities confined WGM in gaps wavelength division multiplexer...
Abstract Recently, metasurfaces have been proven to be effective and compact devices for the design of arbitrary wavefronts. Metasurfaces are planar metamaterials with a subwavelength thickness that allows wavefront shaping by introducing in-plane variations, namely, gradients, in spatial wave response these flat structures. Here we report new class acoustic gradient-index (GRIN) engineered from soft graded-porous silicone rubber high index broadband ultrasonic three-dimensional water. The...
The advances in topological condensed matter physics enable the manipulation of classic waves different ways, such as unidirectional propagation featuring suppression backscattering and robustness against impurities disorder, making it possible to endow classical phenomena with properties. Fano resonance, a widely spread basic kind features an asymmetric line shape ultrahigh quality factor $Q$ that usually requires delicate designs precise fabrication. In this work, we achieve robust...
Metasurfaces are planar metamaterials with a flat surface and subwavelength thickness that able to shape arbitrary wave fronts such as focusing or imaging. There is broad interest in the literature about imaging based on bulk while utilization of metasurfaces for elastic waves has rarely been reported. Here, we present type metasurface consisting line gradient resonant pillars robust deep plate. Numerical approaches supported by analytic Huygens-Fresnel demonstrations show full width at half...
How to endow diverse functions for lightweight structures without increasing mass has always been a major challenge (e.g., have simultaneous high static stiffness and extreme-low dynamic in one structure) from both fundamental science engineering application. In this work, Archimedean spiral metastructures are proposed low-frequency vibration isolation by combining double-layer corrugated sandwich core two metamaterial plates, which the former provides load-bearing properties, latter...
Rapid advances have been made in the properties of metastructures, including phononic crystals, metamaterials, and metasurfaces, with respect to their robustness, high power density, broadband behavior. This presents unique advantages for energy harvesting devices meet demands technology upgrades various applied science engineering applications such as wireless sensors, MEMS, wearable devices. We provide a systematic overview mechanisms underlying above properties, considering different...
We theoretically, numerically, and experimentally study a lightweight metastructure that can simultaneously reduce vibration noise in broad low-frequency range. introduce spiral slits micro-perforations the panel core plate of face-centered cubic sandwich structure, respectively. A bottom-up acoustic impedance theory is developed to describe single unit cell. Broadband sound absorption achieved for 3 × supercell via reinforcement learning optimization. The resonant coupling upper lower form...
The underwater broadband anechoic coating is highly demanded in acoustic stealth for vehicles. In this work, we propose a gradient index metamaterial sound absorption, which further experimentally validated under high pressure conditions. consisting of radius-varied cavities rubber allows the waves to follow objective trajectory broad band with impedance matching at interface water. viscosity materials and coupling effect among contribute absorption. performance absorption from 1 10 kHz...
The anechoic coating capable of absorbing sound energy in low frequencies within broadband is essential to conceal underwater vehicles. However, the geometric deformation and modification mechanical parameters under hydrostatic pressure affect prediction absorption performance deep water environments. An embedded with tandem resonant voids proposed this work achieve quasi-perfect low-frequency absorption. analytical method based on effective medium approach numerical simulation are performed...
In this work we theoretically study the interface acoustic states of resonators on a thin plate with topologically protected and conventional designs. Topologically state is first analyzed by employing conception breaking inversion symmetry within unit cell honeycomb lattice for cylindrical spherical resonators; further demonstrate robustness wave propagation along zig-zag path containing sharp corners, defect disorder. The ceases to be preserved if increase degree disorder path. parallel,...
The authors demonstrate, both theoretically and experimentally, that engineered diffraction gratings can modulate the acoustic wavefront more efficiently than traditional devices based on complex metamaterials metasurfaces. To demonstrate feasibility of this approach, a three-dimensional conical ground cloak is fabricated tested, with remarkable results, compared to other cloaks different physical mechanisms. This achievement shows path advanced control mechanical waves by means simpler,...
The mechanical analog to the topological insulators brings anomalous elastic wave properties which diversifies classic functions for potential broad applications. To obtain states with good quality at desired frequency ranges, it needs repetitive trials of different geometric parameters traditional forward designs. In this work, we develop an inverse design edge flexural using machine learning method is promising instantaneous design. Nonlinear mapping function from input targets output are...
We investigate theoretically the properties of phononic crystal plates with hollow pillars. Such crystals can exhibit confined whispering gallery modes around parts pillars whose localization be increased by separating pillar from plate a full cylinder. discuss behaviors these and their potential applications in guiding filtering. Filling fluid gives rise to new localized modes, which depend on physical height fluid. Thus, actively controlled for purpose multichannel multiplexing. In...
We propose topological metamaterials working in Hertz frequency range, constituted of concrete pillars on the soil ground a honeycomb lattice. Based analog quantum valley Hall effect, non-trivial bandgap is formed by breaking inversion symmetry unit cell. A interface created between two different crystal phases whose robustness against various defects and disorders quantitatively analyzed. Finally, we take advantage robust compact edge state for designing harvesting energy device. The...