Article
Instruments & Instrumentation
Guobiao Hu, Lihua Tang, Yaowen Yang, Dewen Yu, Yunlong Zi
Summary: This paper presents a generic modelling approach for predicting the high-frequency dynamics of piezoelectric metamaterial beams and demonstrates its robustness and stability compared to the transfer matrix method. Several case studies are carried out to validate the approach and a parameter-based optimization study is conducted to showcase the value of high-fidelity modelling.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Physical
Linzhongyang E, Zhijing Wu, Fengming Li, Guangping Zou
Summary: In this study, elastic metamaterial sandwich plates with axially deformed Timoshenko beam cores were designed and their vibration band-gap properties were explored. The finite element method (FEM) and the spectral element method (SEM) were combined to establish the dynamic model and calculate the frequency response functions (FRFs) of the plates. It was found that the metamaterial sandwich plates possess both axial and transverse vibration band-gaps, and those with axially deformed beam cores have wider application ranges for vibration reduction compared to plates with rod cores.
Article
Multidisciplinary Sciences
Samir Salem Al-Bawri, Mohammad Tariqul Islam, Md Shabiul Islam, Mandeep Jit Singh, Haitham Alsaif
Summary: This article proposes an integrated massive multiple-input multiple-output (mMIMO) antenna system loaded with metamaterial (MTM) for fifth-generation (5G) applications. The article presents the achievement of duple negative (DNG) characteristics using a compact complementary split-ring resonator (SRR), a broad epsilon negative metamaterial (ENG), and near-zero refractive index (NZRI) features. The proposed mMIMO antenna consists of eight subarrays with three layers and operates in the 5G millimeter-wave band. The experimental results show that the recommended antenna loaded with MTM has good MIMO performance.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
E. Linzhongyang, Zhijing Wu, Guangping Zou, Fengming Li, Chuanzeng Zhang, Aijun Sun, Qiang Du
Summary: A new kind of elastic metamaterial plate is designed to control vibration and elastic wave propagation through the arrangement of local resonant rods and the adjustment of their damping and mass. Analysis of the structure was conducted using the finite element and spectral element hybrid method, and the validity of the approach was confirmed through experiments and simulations. The results demonstrated that the band-gap characteristics can be altered by modifying material and structural parameters, and increasing the band-gap width can effectively reduce vibration and provide better sound isolation.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Long Zhao, Ze-Qi Lu, Hu Ding, Li-Qun Chen
Summary: This study proposes an approach to explore the band energy structures of elastic metamaterials using the Hamilton principle, Bloch theorem, and finite-element method. Experimental verification on ultralow frequency metamaterials with nonlinear resonators confirms the broadband isolation of longitudinal and transverse waves.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Civil
Songliang Zhang, Jia Lou, Hui Fan, Jianke Du
Summary: A new nonlinear acoustic metamaterial beam is designed and analyzed in this paper. The system consists of a homogeneous beam with periodic resonant units attached on the top surface. An analytical model is developed to evaluate the amplitude-frequency response, dispersion, and band gaps of the flexural wave. The effects of linear and nonlinear stiffness and resonator arrangement on the frequency band structure are discussed. The numerical results validate the developed analytical model and demonstrate the enhanced tunability of the band gap due to system nonlinearity.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Wen-Zheng Que, Xiao-Dong Yang, Huayan Pu
Summary: In this study, a novel lever-type elastic metamaterial model is designed to attenuate low-frequency waves. The dispersion relation and effective mass expression are derived, and the band structure characteristics and parameter effects on the band gap are analyzed. The results show that a low-frequency band gap can be obtained and the wave attenuation capability within the gap can be enhanced. The proposed structure's dynamic response is verified through numerical integration, and its potential application in shock wave attenuation is demonstrated.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Civil
Wenkai Dong, Ting Wang, Zhangkai Huang, Meixia Chen, Qingsheng Li, Wenchao Jia
Summary: In recent years, local resonance metamaterials have gained significant attention for their ability to control low-frequency noise and vibration. This study introduces a new metamaterial plate with double mass membrane-type resonators. Through polynomial fitting and virtual spring method, the natural characteristics of the resonator and the dispersion surfaces of the metamaterial plate are obtained. The results show that the proposed metamaterial plate exhibits multiple band gaps, and parametric analysis reveals that the occurrence and width of the band gaps are closely related to the mass ratio between the resonator and the substrate plate. Furthermore, finite element analysis is conducted to verify the theoretical derivation and demonstrate the effectiveness of the metamaterial plate in vibration control and band gap tuning.
THIN-WALLED STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Khalid Majeed, Shahab Ahmad Niazi, O. Altintas, M. A. Baqir, M. Karaslaan, Ugur Cem Hasar
Summary: In this study, a single-layered cartwheel-shaped metamaterial absorber operating in the microwave band is proposed. The absorber shows good angular stability and high absorptivity at multiple resonance peaks. Its absorption characteristics can be tuned by modifying the substrate thickness.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Crystallography
Bukola Ajewole, Pradeep Kumar, Thomas Afullo
Summary: This paper presents a novel I-shaped metamaterial using split-ring resonators for multi-band wireless communication. The proposed design is optimized through parametric analysis and simulation using CST and MATLAB. The ISMeTM unit cell and arrays are designed and analyzed, with emphasis on the resonance and interaction between the split ring and electric/magnetic fields. The results confirm the multi-band operation of the proposed design.
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, Qing-xin Zhao
Summary: This paper proposes a metamaterial structure with special characteristics to attenuate elastic wave propagation in the mid and low frequency range. Numerical studies show that the structure exhibits ultra-wide band gaps and can open multiple band gaps by adding support structures. The vibration transmission loss of the structure is analyzed using finite element method, and its control performance in periodic structures is simulated, demonstrating its potential in practical applications.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Multidisciplinary Sciences
Niuniu Liu, Xianliang Lei, Fuqiang Lai, Xin Xue
Summary: The study investigates wave propagation and vibration transmission in metamaterial-based elastic rods with DAVI resonators, showcasing the potential to achieve lower resonant band gaps by adjusting the parameters of the resonators. Comparative analysis of different types of resonators reveals their impact on the bandgap behavior.
Article
Acoustics
Vinicius F. Dal Poggetto, Alberto L. Serpa
Summary: The development of periodic metamaterials for attenuation of low- and mid-frequency range vibrations has been thoroughly studied. In this paper, a ternary periodic metamaterials made of concentric circular inclusions of a rigid material coated with a soft material is investigated, showing the validity of the Mindlin plate model and its potential practical applications.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Electrical & Electronic
Mohammed Berka, Benzerga Fellah, Tanvir Islam, Amina Bendaoudi, Sudipta Das, Zoubir Mahdjoub, Luciano Tarricone
Summary: In this research paper, a tri-band metamaterial absorber is suggested for microwave applications. The absorber is designed and optimized to provide efficient absorption in the Microwave C-and X-band regions. The proposed MMA demonstrates co-polarization insensitive absorptions and incident angle stability for both TE and TM modes. It shows three absorption peaks at frequencies of 5.86, 6.57 and 8.94 GHz, making it suitable for satellite, sensors and radar communications.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Acoustics
Shengping Fan, Jing Li, Linyong Li, Xiaopeng Fan, Hualiang Li, Nansha Gao
Summary: The paper investigates the band gaps in a mass-spring structure composed of a resonator with elastic support. Numerical calculations are used to determine the band structure, effective parameters, and transmission spectra of the acoustic metamaterials. The results show that the first and second band gaps are generated by the elastic support and resonator in the structure, respectively. The effects of structural parameters on the band structure and attenuation factor are also analyzed numerically.
NOISE CONTROL ENGINEERING JOURNAL
(2023)
Article
Physics, Multidisciplinary
Shuaimin Hao, Zhijing Wu, Fengming Li, Chuanzeng Zhang
Article
Materials Science, Multidisciplinary
Tongtong Huo, Zhijing Wu, Fengming Li
Summary: To reduce the dimension in the direction of vibration suppression, a folded S-type periodic structure is developed for phononic crystals. An improved folded S-type periodic structure with different unit cell arrangements is designed to widen the bandgap frequency range. Energy band diagrams and frequency responses are calculated based on the Bloch theory and using the finite element method. A prototype of the improved folded S-type periodic structure is fabricated and a vibration experiment is conducted to verify its performance.
ACTA MECHANICA SOLIDA SINICA
(2023)
Article
Thermodynamics
Longkai Zheng, Zhijing Wu, Shurui Wen, Fengming Li
Summary: An effective method is proposed for the dynamic modelling and thermoelastic damping (TED) evaluation of cylindrical shells with arbitrary boundaries. The boundary conditions are simulated using springs, and Hamilton's principle with the Rayleigh-Ritz method is employed to establish the equations of motion. Analytical models for TED are obtained by computing the dissipated energy and maximum elastic potential energy. The correctness and feasibility of the models are verified by comparing with published literature and finite element method (FEM) results.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Acoustics
Longkai Zheng, Fengming Li, Zhijing Wu, Shurui Wen
Summary: A novel strategy is proposed for the dynamic modelling and quality factor evaluation of hemispherical shell resonators (HSR) considering the coupling of hemispherical shell and support rod. The artificial spring technique is introduced to simulate arbitrary boundary conditions. Hamilton's principle with the Rayleigh-Ritz method is employed to establish the equation of motion and obtain the natural frequencies of the HSR. The thermal energy method is applied to evaluate the thermoelastic damping (TED) of the HSR. The model of anchor loss is based on a separation and transfer method. The present theoretical model is validated through comparisons with published literature and finite element method (FEM). The effects of boundary conditions, geometrical parameters, and material properties on the vibration behaviors and quality factors of the HSR are analyzed.
JOURNAL OF SOUND AND VIBRATION
(2024)
Article
Engineering, Mechanical
Xuanen Kan, Yanjun Lu, Fan Zhang, Weipeng Hu
Summary: A blade disk system is crucial for the energy conversion efficiency of turbomachinery, but differences between blades can result in localized vibration. This study develops an approximate symplectic method to simulate vibration localization in a mistuned bladed disk system and reveals the influences of initial positive pressure, contact angle, and surface roughness on the strength of vibration localization.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Zimeng Liu, Cheng Chang, Haodong Hu, Hui Ma, Kaigang Yuan, Xin Li, Xiaojian Zhao, Zhike Peng
Summary: Considering the calculation efficiency and accuracy of meshing characteristics of gear pair with tooth root crack fault, a parametric model of cracked spur gear is established by simplifying the crack propagation path. The LTCA method is used to calculate the time-varying meshing stiffness and transmission error, and the results are verified by finite element method. The study also proposes a crack area share index to measure the degree of crack fault and determines the application range of simplified crack propagation path.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Rongjian Sun, Conggan Ma, Nic Zhang, Chuyo Kaku, Yu Zhang, Qirui Hou
Summary: This paper proposes a novel forward calculation method (FCM) for calculating anisotropic material parameters (AMPs) of the motor stator assembly, considering structural discontinuities and composite material properties. The method is based on multi-scale theory and decouples the multi-scale equations to describe the equivalence and equivalence preconditions of AMPs of two scale models. The effectiveness of this method is verified by modal experiments.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Hao Zhang, Jiangcen Ke
Summary: This research introduces an intelligent scheduling system framework to optimize the ship lock schedule of the Three Gorges Hub. By analyzing navigational rules, operational characteristics, and existing problems, a mixed-integer nonlinear programming model is formulated with multiple objectives and constraints, and a hybrid intelligent algorithm is constructed for optimization.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Jingjing He, Xizhong Wu, Xuefei Guan
Summary: A sensitivity and reliability enhanced ultrasonic method has been developed in this study to monitor and predict stress loss in pre-stressed multi-layer structures. The method leverages the potential breathing effect of porous cushion materials in the structures to increase the sensitivity of the signal feature to stress loss. Experimental investigations show that the proposed method offers improved accuracy, reliability, and sensitivity to stress change.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Benyamin Hosseiny, Jalal Amini, Hossein Aghababaei
Summary: This paper presents a method for monitoring sub-second or sub-minute displacements using GBSAR signals, which employs spectral estimation to achieve multi-dimensional target detection. It improves the processing of MIMO radar data and enables high-resolution fast displacement monitoring from GBSAR signals.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xianze Li, Hao Su, Ling Xiang, Qingtao Yao, Aijun Hu
Summary: This paper proposes a novel method for bearing fault identification, which can accurately identify faults with few samples under complex working conditions. The method is based on a Transformer meta-learning model, and the final result is determined by the weighted voting of multiple models.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xiaomeng Li, Yi Wang, Guangyao Zhang, Baoping Tang, Yi Qin
Summary: Inspired by chaos fractal theory and slowly varying damage dynamics theory, this paper proposes a new health monitoring indicator for vibration signals of rotating machinery, which can effectively monitor the mechanical condition under both cyclo-stationary and variable operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Hao Wang, Songye Zhu
Summary: This paper extends the latching mechanism to vibration control to improve energy dissipation efficiency. An innovative semi-active latched mass damper (LMD) is proposed, and different latching control strategies are tested and evaluated. The latching control can optimize the phase lag between control force and structural response, and provide an innovative solution to improve damper effectiveness and develop adaptive semi-active dampers.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Menghao Ping, Xinyu Jia, Costas Papadimitriou, Xu Han, Chao Jiang, Wang-Ji Yan
Summary: Identification of non-Gaussian processes is a challenging task in engineering problems. This article presents an improved orthogonal series expansion method to convert the identification of non-Gaussian processes into a finite number of non-Gaussian coefficients. The uncertainty of these coefficients is quantified using polynomial chaos expansion. The proposed method is applicable to both stationary and nonstationary non-Gaussian processes and has been validated through simulated data and real-world applications.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Lei Li, Wei Yang, Dongfa Li, Jianxin Han, Wenming Zhang
Summary: The frequency locking phenomenon induced by modal coupling can effectively overcome the dependence of peak frequency on driving strength in nonlinear resonant systems and improve the stability of peak frequency. This study proposes the double frequencies locking phenomenon in a three degrees of freedom (3-DOF) magnetic coupled resonant system driven by piezoelectricity. Experimental and theoretical investigations confirm the occurrence of first frequency locking and the subsequent switching to second frequency locking with the increase of driving force. Furthermore, a mass sensing scheme for double analytes is proposed based on the double frequencies locking phenomenon.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Kai Ma, Jingtao Du, Yang Liu, Ximing Chen
Summary: This study explores the feasibility of using nonlinear energy sinks (NES) as replacements for traditional linear tuned mass dampers (TMD) in practical engineering applications, specifically in diesel engine crankshafts. The results show that NES provides better vibration attenuation for the crankshaft compared to TMD under different operating conditions.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Wentao Xu, Li Cheng, Shuaihao Lei, Lei Yu, Weixuan Jiao
Summary: In this study, a high-precision hydraulic mechanical stand and a vertical mixed-flow pumping station device were used to conduct research on cavitation signals of mixed-flow pumps. By analyzing the water pressure pulsation signal, it was found that the power spectrum density method is more sensitive and capable of extracting characteristics compared to traditional time-frequency domain analysis. This has significant implications for the identification and prevention of cavitation in mixed-flow pump machinery.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Xiaodong Chen, Kang Tai, Huifeng Tan, Zhimin Xie
Summary: This paper addresses the issue of parasitic motion in microgripper jaws and its impact on clamping accuracy, and proposes a symmetrically stressed parallelogram mechanism as a solution. Through mechanical modeling and experimental validation, the effectiveness of this method is demonstrated.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Engineering, Mechanical
Zhifeng Shi, Gang Zhang, Jing Liu, Xinbin Li, Yajun Xu, Changfeng Yan
Summary: This study provides useful guidance for early bearing fault detection and diagnosis by investigating the effects of crack inclination and propagation direction on the vibration characteristics of bearings.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)