Article
Engineering, Mechanical
Xinlei Fan, Jinqiang Li, Xueyi Zhang, Fengming Li
Summary: In this paper, a metamaterial plate with low and wide frequency bandgaps is designed using complex resonators. The transmission and vibration characteristics of the plate are studied through finite element simulation and experiment, showing that the bandgaps can be adjusted by changing the structure of the complex resonators.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Jinqiang Li, Yao Zhang, Xinlei Fan, Fengming Li
Summary: This study proposes a metamaterial plate with multi bandgaps for vibration suppression by integrating membrane-mass structures that can be used as locally resonant metastructure into a honeycomb sandwich structure. The mode shapes of the membrane-mass resonator and face plate in a unit cell are analyzed to investigate the formation mechanisms of the locally resonant bandgaps. An improved multi bandgaps structure is designed and discussed. Experimental measurements show that the proposed metamaterial exhibits excellent vibration suppression performance.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Tao Chen, Tianqi Zhao, Qingyan He, Renchang Sun
Summary: In this study, the vibration energy flow (VEF)-controlling regions in a piezoelectric metamaterial plate were determined using the structural intensity method. The influence of temperature rise and input voltage on the VEF magnitude and direction were investigated using a finite element model and a VEF analysis model. The results showed that both temperature rise and input voltage had significant effects on the VEF, with the input voltage playing a more important role in controlling the direction.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Mechanics
Wenliang Gao, Jiaxin Hu, Zhaoye Qin, Fulei Chu
Summary: This research presents a novel perforated metamaterial plate with acoustic black holes (ABHs) interconnected by piezoelectric studs for flexural wave manipulation. It derives the governing equations of the metamaterial plate using the differential quadrature element method and the first-order shear deformation plate theory. The proposed model is validated by comparing with finite element simulation results, and the wave propagation characteristics are obtained. The results show that the introduction of piezoelectric patches in the studs brings wider complete bandgaps (BGs) and stronger collimation effect at lower frequencies.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Yanzheng Wang, Yongfeng Zheng, Mikhail Golub, Sergey Fomenko, Guoliang Huang, Weiqiu Chen, Chuanzeng Zhang
Summary: Inspired by electronic demultiplexers, acoustic/elastic demultiplexers have gained attention recently. This study proposes a multi-channel demultiplexer based on one-dimensional piezoelectric metamaterial plates connected to shunting circuits. The design principle relies on the tunability of the piezoelectric plate bandgaps using external LC circuits. Numerical simulations validate the feasibility of the four-channel demultiplexer, which can be integrated into electronic devices for wireless telecommunication and signal processing applications.
EXTREME MECHANICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Hagar Hamdy, Ghada Yassin Abdel-Latif, M. El-Agamy, H. A. El-Mikati, Mohamed Farhat O. Hameed, S. S. A. Obayya
Summary: This paper proposes a novel wavelength selective metamaterial absorber based on a 2D split rhombus grating and analyzes its absorption characteristics. By coupling surface plasmon polaritons, Fabry-Perot resonance, and magnetic polaritons, the absorber achieves perfect absorption over a wide wavelength range and is insensitive to the incident angle. It shows great potential for use in solar energy harvesting and conversion systems.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Zhongsheng Chen, Yeping Xiong, Yongxiang Wei
Summary: A binary-like topology optimization scheme is proposed to optimize the bandgap of a piezoelectric metamaterial plate (PMP), along with a coupling model for a self-powered synchronized charge extraction circuit. The results demonstrate that maximum bandgap can be achieved at a given frequency through extended genetic algorithm and numerical analysis.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Applied
Takashi Suzuki, Masashi Suzuki, Shoji Kakio
Summary: The resonance properties of leaky surface acoustic waves (LSAWs) and longitudinal LSAWs (LLSAWs) on bonded structures consisting of a LiNbO3 (LN) thin plate and a support substrate were simulated using the finite element method. The simulations showed that introducing periodic voids can result in resonance properties similar to those of SH0-mode plate and S-0-mode Lamb waves. The simulated fractional bandwidths were approximately 13% and 18% for LSAW and LLSAW, respectively, when the ratio of void width to electrode pitch was 0.7.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Patrik Micek, Alexandr Belosludtsev, Tatjana Gric, Dusan Pudis, Peter Gaso, Matej Goraus
Summary: In this study, the character of the near-field emission of two- (2D) and novel three-dimensional (3D) probe geometries fabricated using 3D direct laser writing lithography was investigated. Near-field scans in x-y and y-z planes were measured to verify the directional propagation of high wave-vector components before and after the deposition of hyperbolic dispersion metamaterial (HMM). Computational and theoretical characterization showed promising performance for the 3D Fresnel zone plate (FZP), preceding the actual experimental measurements. Overall, the experimental data demonstrated subwavelength resolution and significant signal enhancement in the focal spot of the 3D FZP, along with a highly subwavelength depth of focus.
Article
Computer Science, Information Systems
Alessandro Nastro, Marco Bau, Marco Ferrari, Libor Rufer, Skandar Basrour, Vittorio Ferrari
Summary: The possibility of steering floating cells dispersed in water using flexural plate waves generated by a piezoelectric MEMS transducer has been explored. The working principle has been validated through simulations and experimental testing. The results show successful alignment of cells using this method.
Article
Materials Science, Multidisciplinary
Fang Kang, Bin Yao, Wenxiong Zhang, Fangyi Yao, Qing Zhao, Lei Miao, Fan Zhao, Zhuonan Huang, Weixing Zhao, Galhenage Asha Sewvandi, Yifei Wang, Lixue Zhang, Qi Feng, Dengwei Hu
Summary: BaTiO3 polycrystals with platelike morphology were prepared from a layered titanate single crystal as the precursor and different barium compounds. By using the layered titanate single crystal as the precursor, BaTiO3 mesocrystals with high purity and various zone axes can be formed. Furthermore, textured BaTiO3 ceramics with excellent physical properties were fabricated via templated grain growth using the BaTiO3 mesocrystals as templates.
MATERIALS ADVANCES
(2022)
Proceedings Paper
Acoustics
Cheng-cheng Xu, Li-li Yuan, Jian-ke Du, Ji Wang
Summary: This paper introduces the use of cement-based piezoelectric composite materials in phononic crystals to create a local resonant metamaterial plate. The band gap structure of the metamaterial plate is calculated using the finite element method (FEM). The effects of various parameters, such as lattice constant, material composition, metal materials, and geometric parameters, on the band gap are discussed in detail. The results show that the metamaterial plate can achieve ultra-wide band gaps with appropriate material and geometric parameters.
2022 16TH SYMPOSIUM ON PIEZOELECTRICITY, ACOUSTIC WAVES, AND DEVICE APPLICATIONS, SPAWDA
(2022)
Article
Materials Science, Multidisciplinary
Beibei Xu, Jiao Wang, Weiqiu Chen, Bin Liu
Summary: This paper discusses the applicability of dynamic homogenization models in certain dynamic phenomena and investigates various phenomena in heterogeneous materials, such as supersonic propagation and the evolution of energy distribution. The findings pose challenges to the establishment of dynamic homogenization models.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Zhen Yang, Zhicheng Zhang, Chengbin Liu, Cunfa Gao, Weiqiu Chen, Chunli Zhang
Summary: This article investigates the electromechanical coupling behaviors of a hollow piezoelectric semiconductor (PS) composite cylinder and presents analytical solutions for different boundary conditions. The effects of geometric parameters and interface bonding condition on the multifield coupling responses and piezotronic effects are discussed.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Ocean
Shuang Zhao, Kuihua Wang, Juntao Wu, Weiqiu Chen, Yuan Tu
Summary: This study investigates the vertical bearing behaviors of flexible batter pile groups in sand. Model tests and finite-element analysis are conducted to study the effects of batter angle on vertical bearing capacities and internal force distributions. A design method is proposed for predicting the bearing ratios of batter pile groups.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)
Article
Mechanics
Jiaqing Jiang, Yun Wang, Weiqiu Chen, Rongqiao Xu
Summary: This paper proposes a two-dimensional analytical model for composite beams using the equivalent transformation of cross section. The state equations are derived based on the mixed variational principle and solved using the differential quadrature method. The method allows for convenient handling of transfer characteristics at the interlayer interfaces of composite beams and can serve as benchmarks for various one-dimensional beam theories.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Zhicheng Zhang, Chao Liang, Dejuan Kong, Zhengguang Xiao, Chunli Zhang, Weiqiu Chen
Summary: This study investigates the dynamic buckling and free bending vibration of an axially compressed piezoelectric semiconductor (PS) rod at the nanoscale, and analyzes the effects of surface effect on the critical dynamic buckling loads and damped resonance frequencies. Furthermore, the influences of axial compressive force and initial electron concentration on the effective damping ratio of the vibrating PS rod are studied.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Review
Engineering, Mechanical
Zinan Zhao, Yingjie Chen, Xueyan Hu, Ronghao Bao, Bin Wu, Weiqiu Chen
Summary: This paper reviews the mechanics of dielectric elastomers (DEs), including their dynamic responses, nonlinear electroelasticity, and periodic structures. The research results provide design and solution approaches, and discuss the underlying physics. It offers a useful guide for future studies.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Mechanical
Guozhan Xia, Wei Hong, Weiqiu Chen
Summary: In this paper, a physical model of a layer-substrate system penetrated by a rigid indenter was established to interpret the indentation test of advanced materials. The indentation of a pre-deformed compressible soft electroactive (SEA) layer on an elastic substrate was formulated as a Fredholm integral equation of the second kind and solved using a customized finite-difference scheme. The modified JKR model was used to incorporate surface adhesion for the layer-substrate system. The effects of adhesion and substrate on the indentation responses were investigated for a neo-Hookean ideal dielectric elastomer.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Artem A. Eremin, Mikhail V. Golub, Sergey I. Fomenko, Alexander A. Evdokimov, Polina A. Nets
Summary: The study investigates the feasibility of simulating elastic guided wave phenomena in composite structures using effective single-layer models. The applicability and limitations of the homogenized models are demonstrated and discussed through a comparison with the multi-layered model. The results show that single-layer models can only achieve a qualitative description of elastic guided wave phenomena in the considered composites.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Mikhail V. V. Golub, Olga V. V. Doroshenko, Yan Gu
Summary: This study examines two modeling approaches for describing partially closed delaminations or imperfect contact zones that often occur at interfaces. The applicability of effective spring boundary conditions for guided wave scattering by a finite length delamination is confirmed through comparison with an equivalent cohesive zone model. The influence of different types of partially closed delaminations on wave characteristics is investigated.
Article
Engineering, Multidisciplinary
Mikhail V. Golub, Sergey I. Fomenko, Alisa N. Shpak, Yan Gu, Yanzheng Wang, Chuanzeng Zhang
Summary: An advanced semi-analytical hybrid approach is proposed for simulating the dynamic behavior of guided waves-based structural health monitoring (SHM) system. The approach combines the frequency domain spectral element method and the advanced boundary integral equation method to simulate wave excitation, scattering and sensing in a multi-layered elastic waveguide with internal delaminations and piezoelectric/elastic inhomogeneities. The hybrid method allows for the analysis of resonance frequencies, energy flow, and parametric analysis of guided wave propagation in structures with multiple delaminations and surface-mounted inhomogeneities.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Multidisciplinary
Z. Jiao, T. Heblekar, G. Wang, R. Xu, W. Chen, J. N. Reddy
Summary: The dual mesh control domain method (DMCDM) proposed by Reddy combines the advantages of the finite element method (interpolation of variables) and the finite volume method (satisfaction of the global form of the governing equations). This study extends the DMCDM for analyzing plane elasticity problems on non-rectangular domains meshed with arbitrarily shaped elements. The results show that the DMCDM exhibits excellent convergence and accuracy while requiring less computational cost when compared with the finite element method (FEM).
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Mechanics
Yan Gu, Chuanzeng Zhang, Peijun Zhang, Mikhail V. Golub, Bo Yu
Summary: In this paper, a meshless method based on physics-informed neural networks (PINNs) is proposed to analyze 2D in-plane crack problems in linear elastic fracture mechanics. The method incorporates crack-tip enrichment functions to accurately model the local behavior near the crack tip, without the need for nodal refinement. The PINNs-based algorithm is shown to be simpler and more feasible than traditional finite element method (FEM) or boundary element method (BEM) for incorporating crack-tip enrichment functions.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Mathematics
Sergey I. Fomenko, Raghavendra B. Jana, Mikhail V. Golub
Summary: This study proposes an advanced mathematical and numerical coupled model to investigate the propagation of elastic waves in multi-layered soils subjected to subsoil water infiltration. The model considers the heterogeneity of the soil and describes the permeability using an inhomogeneous functionally graded fluid-saturation based on Richards' equation. The time-harmonic solution is formulated using the Fourier transform of Green's matrix and the surface load. The study demonstrates the convergence and efficiency of the proposed approach and provides an example of dispersion curves for partially saturated porous strata.
Article
Mathematics
Alex G. Kuchumov, Olga V. Doroshenko, Mikhail V. Golub, Nikita D. Saychenko, Irina O. Rakisheva, Roman M. Shekhmametyev
Summary: An algorithm is proposed to extract key geometric features of an aorta from multi-slice computed tomography images. Using numerical methods, the algorithm can determine geometric characteristics like vessel cross-sectional areas, diameters, and distances between arteries. This step is crucial for training a meta-model and creating an expert system with reduced data volume, as well as identifying important relationships between diagnoses and geometric/hydrodynamic features. This methodology is expected to be part of a novel decision-making software for clinical implementation, providing shunt parameters and installation positions based on clinical data and calculations to ensure regular blood flow.
Proceedings Paper
Engineering, Civil
Kilian Tschoeke, Inka Mueller, Vittorio Memmolo, Ramanan Sridaran Venkat, Mikhail Golub, Artem Eremin, Maria Moix-Bonet, Kathrin Moellenhoff, Yevgeniya Lugovtsova, Jochen Moll, Steffen Freitag
Summary: Reliability assessment of Structural Health Monitoring (SHM) systems poses new challenges that require innovative solutions. Factors such as environmental conditions, structural dependencies, and wave characteristics demand novel approaches for performance analysis. Model-assisted investigations can help understand the results and enable comprehensive studies.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 2
(2023)
Article
Acoustics
Sandip Chajjed, Mohammad Khalil, Dominique Poirel, Chris Pettit, Abhijit Sarkar
Summary: This paper reports the generalization of the Bayesian formulation of the flutter margin method, which improves the predictive performance by incorporating the joint prior of aeroelastic modal parameters. The improved algorithm reduces uncertainties in predicting flutter speed and can cut cost by reducing the number of flight tests.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pascal Zeise, Bernhard Schweizer
Summary: Air ring bearings are an improved version of classical air bearings, providing better damping behavior and allowing operation above the linear threshold speed of instability. However, there is a risk of dangerous vibrations in certain rotor systems, which can be addressed by considering ring tilting effects.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Zbynek Sika, Jan Krivosej, Tomas Vyhlidal
Summary: This paper presents a novel design of a compact six degrees of freedom active vibration absorber with six identical eigenfrequencies. The objective is to completely suppress the vibration of a machine structure with six motion components. By utilizing a Stewart platform structure equipped with six active legs, a spatial unifrequency absorber with six identical eigenfrequencies is achieved. The design is optimized using a correction feedback and active delayed resonator feedback.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kai Li, Yufeng Liu, Yuntong Dai, Yong Yu
Summary: This paper presents a novel light-powered self-oscillating liquid crystal elastomer (LCE) bow that can self-oscillate continuously and periodically under steady illumination. The dynamics of the LCE bow are theoretically investigated and numerical calculations predict its motion regimes. The suggested LCE bow offers potential advantages in terms of simple structure, customizable size, flexible regulation, and easy assembly.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Carmelo Rosario Vindigni, Giuseppe Mantegna, Calogero Orlando, Andrea Alaimo
Summary: In this study, a simple adaptive flutter suppression system is designed to increase the operative speed range of a wing-aileron aeroelastic plant. The system achieves almost strictly passivity by using a parallel feed-forward compensator implementation and the controller parameters are optimized using a population decline swarm optimization algorithm. Numerical simulations prove the effectiveness of the proposed simple adaptive flutter suppression architecture in different flight scenarios.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Nicco Ulbricht, Alain Boldini, Peng Zhang, Maurizio Porfiri
Summary: The quantification of fluid-structure interactions in marine structures is crucial for their design and optimization. In this study, an analytical solution for the free vibration of a bidirectional composite in contact with a fluid is proposed. By imposing continuity conditions and boundary conditions, the coupled fluid-structure problem is solved and applied to sandwich structures in naval construction, offering insights into the effects of water on mode shapes and through-the-thickness profiles of displacement and stress.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Shahram Hadian Jazi, Mostafa Hadian, Keivan Torabi
Summary: Non-uniformity and damage are the main focus in studying vibrations of beam elements. An exact closed-form explicit solution for the transverse displacement of a nonuniform multi-cracked beam is introduced using generalized functions and distributional derivative concepts. By introducing non-dimensional parameters, the motion equation and its closed-form solution are obtained based on four fundamental functions. The impact of crack count, location, intensity, and boundary conditions on natural frequency and mode shape is evaluated through numerical study.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Eugenio Tramacere, Marius Pakstys, Renato Galluzzi, Nicola Amati, Andrea Tonoli, Torbjoern A. Lembke
Summary: This paper proposes the experimental stabilization of electrodynamic maglev systems by means of passive components, providing key technological support for the Hyperloop concept of high-speed and sustainable transportation.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Pengfei Deng, Xing Tan, He Li
Summary: In this paper, the authors improve the surface morphology method and study the bit-rock interaction model between the rock and the PDC bit, taking into account the impact of blade shape and cutter arrangement. They establish a dynamic model for a deep drilling system equipped with an arbitrary shape PDC bit and propose a stability prediction method. The results show that the shape of the blades and arrangement of the cutters on the PDC bit significantly affect the nonlinear vibration of the drilling system.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Salvador Rodriguez-Blanco, Javier Gonzalez-Monge, Carlos Martel
Summary: In modern LPT designs, the simultaneous presence of forced response and flutter in different operation regimes is unavoidable. Recent evidence suggests that the traditional linear superposition method may be overly conservative. This study examines the flutter and forced response interaction in a realistic low pressure turbine rotor and confirms that the actual response is much smaller than that predicted by linear superposition.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Kabilan Baskaran, Nur Syafiqah Jamaluddin, Alper Celik, Djamel Rezgui, Mahdi Azarpeyvand
Summary: This study investigates the impact of the number of blades on the aeroacoustic characteristics and aerodynamic performance of propellers used in urban air mobility vehicles. The results show that different blade numbers exhibit distinct noise levels, providing valuable insights for further research on propeller noise and aerodynamic performance.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Yongbo Peng, Peifang Sun
Summary: This study focuses on the reliability-based design optimization (RBDO) of the tuned mass-damper-inerter (TMDI) system under non-stationary excitations. The performance of the optimized TMDI system is evaluated using probability density evolution analysis. The results demonstrate the technical advantages of TMDI, including high vibration mitigation performance, considerable mass reduction, and less stroke demand.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Guanfu Lin, Zhong-Rong Lu, Jike Liu, Li Wang
Summary: Vision-based measurement is an emerging method that enables full-field measurement with non-contact and high spatial resolution capabilities. This paper presents a single-camera method for measuring out-of-plane vibration of plate structures using motion-parametric homography to capture image variation and displacement response.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Bronislaw Czaplewski, Mateusz Bocian, John H. G. Macdonald
Summary: Despite two decades of study, there is currently no model that can quantitatively explain pedestrian-generated lateral forces. This research proposes a foot placement control law based on empirical data to calibrate and generalize the rigid-leg inverted pendulum model (IPM) for predicting lateral structural stability.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Acoustics
Justine Carpentier, Jean-Hugh Thomas, Charles Pezerat
Summary: This paper proposes an improved method for the identification of vibration sources on a car window using the corrected force analysis technique. By redefining inverse methods in polar coordinates, more accurate results can be obtained.
JOURNAL OF SOUND AND VIBRATION
(2024)
