Journal of Sound and Vibration最新文献

{"title":"Wave parameters of an acoustic black hole beam from exact wave-like solutions","authors":"Le Chang,&nbsp;Li Cheng","doi":"10.1016/j.jsv.2025.119082","DOIUrl":"10.1016/j.jsv.2025.119082","url":null,"abstract":"<div><div>Acoustic black hole (ABH) structures have garnered significant interest due to their unique wave characteristics, encompassing wave velocity reduction, wavelength compression, amplitude augmentation, and energy concentration. Existing wave parameters characterizing ABH features are derived from the geometrical acoustics theory based on local uniformity assumption. Despite their widespread use, they are not rigorously exact and their applicable range remains unknown. Leveraging a tactic variable substitution technique, this paper derives the exact solutions of Bernoulli-Euler ABH beams, cast in a wave-like form. Different from the existing exact solutions, the wave-like form of the solutions allows clear separation of different wave components, thus leading to a full set of explicit analytical expressions of ABH-specific wave parameters including phase velocity, group velocity, wavelength, energy distribution, and energy transport velocity. Valid for the entire frequency range, this new set of exact wave-like solutions allows for the re-assessment of the existing wave parameters based on uniformity assumption to determine their validation range. Meanwhile, the exact wave parameters given by this paper allow for accurate quantification of the ABH effects and inherent physical interpretation of wave motion within an ABH beam, which provides the benchmark and reference solutions for ABH-related research and applications.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"608 ","pages":"Article 119082"},"PeriodicalIF":4.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carleman linearization of nonlinear systems with centers: Spectra and Jordan basis","authors":"Tamás Kalmár-Nagy,&nbsp;Csanád Árpád Hubay","doi":"10.1016/j.jsv.2025.119065","DOIUrl":"10.1016/j.jsv.2025.119065","url":null,"abstract":"<div><div>We present the application of Carleman linearization to analyze the behavior of two-dimensional nonlinear systems with a center. The approach involves embedding nonlinear differential equations with polynomial terms into an infinite-dimensional linear system, which is then truncated to form a Carleman matrix. The block-matrix structure of the resulting Carleman matrices are utilized to obtain their spectrum. The calculation of eigenvectors, Jordan chains and Jordan basis of these Carleman matrices is presented. A simple example is then analyzed.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"607 ","pages":"Article 119065"},"PeriodicalIF":4.3,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of feedback control of levitation system excited by track irregularity for targeting a pre-specified stationary probability density","authors":"Wantao Jia ,&nbsp;Zhengrong Jin ,&nbsp;Wanrong Zan ,&nbsp;Fei Ni","doi":"10.1016/j.jsv.2025.119071","DOIUrl":"10.1016/j.jsv.2025.119071","url":null,"abstract":"<div><div>Stochastic control of levitation systems is paramount for enhancing system stability, optimizing performance, and ensuring operational safety. The present paper investigates the control of stochastic levitation systems to achieve a pre-specified stationary probability density function (PDF). Firstly, the method for predicting the stationary PDFs of the stochastic responses of the levitation system is introduced, leveraging stationary solution theory. Building on this foundation, a feedback control strategy is developed to target the pre-specified stationary PDFs in two practical scenarios through the stochastic linearized levitation system. In the first scenario, the objective is to regulate the vibration amplitude of the stochastic levitation system. The second scenario extends the design framework to include tracking piecewise constant reference signals associated with the stochastic levitation system. Furthermore, the Lyapunov function method is employed to rigorously prove that the proposed feedback control ensures the asymptotic convergence of the PDF of the system response to the desired stationary PDFs over time. The efficacy of the proposed control forces, derived from linearized systems, is validated in both linearized and nonlinear systems. Numerical results demonstrate that the control strategy designed through the linearized system performs effectively even in nonlinear systems. This study presents a novel approach for precise probabilistic control, offering significant advancements in the stability and performance of practical stochastic levitation systems.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"607 ","pages":"Article 119071"},"PeriodicalIF":4.3,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A type-3 fuzzy vibration controller based on active rotary inertia driver systems","authors":"Chunwei Zhang ,&nbsp;Changdong Du ,&nbsp;Rathinasamy Sakthivel ,&nbsp;Ardashir Mohammadzadeh","doi":"10.1016/j.jsv.2025.119072","DOIUrl":"10.1016/j.jsv.2025.119072","url":null,"abstract":"<div><div>Active rotary inertia driver (ARID) plays a vital role in controlling the rotational inertia of a system, and various ranges of industrial applications like robotics, offshore wind turbines, aerospace, and automotive industries. By actively tuning the rotational inertia, the driver can improve stability, dynamic response, and energy efficiency. Also, the robustness can be improved by adjusting the rotational inertia in real time to counteract natural external disturbances or changes in operating conditions. However, the ARID control problem can be complex due to various factors, including the need for online adjustments, nonlinear dynamics of the system, uncertainties in the operating conditions, and interactions with other components in the system. In this paper, a nonlinear controller based on type-3 (T3) fuzzy logic systems (FLSs) is developed. The suggested controller identifies the closed-loop dynamics automatically and does not depend on the ARID predefined physical/mathematical equations. A T3-FLS is used to estimate the control input nonlinearities, and another T3-FLS is used to estimate the dynamic nonlinearities. The both T3-FLSs are online tuned by the Lyapunov adaptation rules. Also, the impact of other disturbances and estimation errors of T3-FLSs are analyzed, and a parallel controller as a compensator is designed to guarantee stability. The designed controller is examined by an experimental study and various simulations. The results of energy and time–frequency analysis, show that the proposed method has a better control effect on the vibration control. In addition, the proposed method also improves the stability and robustness in the actual conditions (see the implementation video at <span><span>https://youtube.com/shorts/kR_97RuHotM?si=qN2EyUEW20Xu2CKy</span><svg><path></path></svg></span>).</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"607 ","pages":"Article 119072"},"PeriodicalIF":4.3,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Localized defect evaluation method based on beam-coupled vibration","authors":"Chanmin Park ,&nbsp;Semin Park ,&nbsp;Junhong Park ,&nbsp;Yunsang Kwak","doi":"10.1016/j.jsv.2025.119080","DOIUrl":"10.1016/j.jsv.2025.119080","url":null,"abstract":"<div><div>This study develops and validates an innovative method for detecting localized structural defects using beam-coupled local modes, which confine vibration to targeted areas and remain sensitive to changes in structural properties while unaffected by external boundary conditions. The proposed method creates a beam-coupled local mode by attaching a small auxiliary beam to the host structure, allowing for precise defect identification through localized modal analysis. The coupled wavelength and resonance frequency of this mode are measured and used to determine local bending stiffness, which directly reflects the presence and severity of defects. Theoretical modeling leverages Euler-Bernoulli beam theory to predict vibrational characteristics, focusing on the emergence of local modes at specific frequencies when structural properties are altered. Numerical simulations conducted via the finite element method highlight robustness against changes in external boundary stiffness and its sensitivity to localized changes. Experimental validation using beam structures with systematically introduced defects further confirms the effectiveness of the method in accurately quantifying localized stiffness variations. Compared to existing modal-based methods, the proposed method eliminates the need for complex signal processing and expensive experimental setups, making it a practical and cost-effective alternative for structural health monitoring. The ability of the proposed method to remain unaffected by boundary condition variations and its capability to isolate localized defects enhance its applicability for reliable structural integrity assessments across diverse engineering applications.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"607 ","pages":"Article 119080"},"PeriodicalIF":4.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A method for the dynamic characteristic analysis of a rotor-rolling bearing system influenced by elastohydrodynamic lubrication","authors":"Kunpeng Liu,&nbsp;Xiujiang Shi,&nbsp;Donghua Wang,&nbsp;Yan Feng,&nbsp;Yusheng Jian,&nbsp;Wanyou Li","doi":"10.1016/j.jsv.2025.119075","DOIUrl":"10.1016/j.jsv.2025.119075","url":null,"abstract":"<div><div>The focus of this paper is to investigate the influence of rolling bearing elastohydrodynamic lubrication (EHL) on rotor dynamic characteristics, while proposing an analytical method for addressing this issue. Firstly, the lubricated contact model and dry contact model between the rolling element and inner and outer raceways were separately established based on the theories of EHL and Hertz contact. The load-mutual approach relationship curves were consequently obtained under both conditions. Furthermore, the finite element method is employed to establish a dynamic model of the rotor-rolling bearing system, simultaneously obtaining a one-to-one mapping relationship between load and vibration displacement. Finally, the Newmark-β numerical solution method is improved by incorporating the mapping relationship between load and vibration displacement through interpolation techniques. This allows for obtaining and comparing the vibration characteristics under both dry contact and EHL conditions, while also analyzing the time-varying stiffness of bearings. The results demonstrate that the impact of EHL on the balanced rotor is substantially more pronounced than on the unbalanced rotor. Additionally, under EHL conditions, the bearing exhibits significantly higher equivalent linear stiffness compared to dry contact conditions.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"608 ","pages":"Article 119075"},"PeriodicalIF":4.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overflow elastic metasurfaces for underwater high-pressure-resistant acoustic wavefront control","authors":"Xudong He ,&nbsp;Zhiwen Ren ,&nbsp;Yuan Hu ,&nbsp;Hao Zuo ,&nbsp;Yuan Li ,&nbsp;Minji Chen ,&nbsp;Hao-Wen Dong ,&nbsp;Daining Fang","doi":"10.1016/j.jsv.2025.119074","DOIUrl":"10.1016/j.jsv.2025.119074","url":null,"abstract":"<div><div>Elastic metasurfaces have shown strong ability of controlling the phase, amplitude and polarization of elastic waves on demand. However, limited by the porous-solid, bi-phase-solid and multi-phase-solid microstructural models, the existing elastic metasurfaces have to comprise some thin connecting rods or materials with low elastic modulus so that the transmutative modes can be induced to capture the required phase and amplitude manipulation. More strikingly, these microstructure features may result in the very low strength of reported elastic metasurfaces, let alone the ability to withstand high hydrostatic-pressure. To simultaneously maintain the abundant elastic wave modes of solids and stable complex wavefront control under high pressures, we propose a kind of overflow elastic microstructural model which comprises the internal acoustic-structure coupling and develop an inverse-design methodology of an overflow elastic metasurface for the pressure-insusceptibility underwater acoustic vortex. Firstly, a model regarding topology optimization of microstructures with internal acoustic-structure coupling is built to achieve the prescribed transmissive phases and amplitudes. Specifically, four kinds of topology-optimized overflow microstructures can simultaneously possess the stable phase difference covering 0-2π and high transmission above 0.9 within the frequency range of 15-15.9 kHz. Benefiting from the strong internal acoustic-structure coupling, the microstructures are discovered to support the monopole/dipole resonances in fluid domains and acoustic-induced local vibrations in solid parts, which leads to the customized nonlinear dispersion properties. Finally, the assembled overflow elastic metasurface is numerically and experimentally demonstrated to enable a focused acoustic vortex beam with the high orbital angular momentum (OAM) purity (close to 100%) and high energy-converting efficiency (over 80%) while keeping the high hydrostatic-pressure-resistant capacity. The proposed overflow microstructural model and inverse-design methodology of the overflow elastic metasurface are promising in constructing extreme elastic wave modes, and even developing new-generation flexible acoustic vortex beams for the large-capacity communication in the deep-water environment.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"607 ","pages":"Article 119074"},"PeriodicalIF":4.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High load-bearing lightweight double-panel metastructures for broadband low-frequency sound insulation","authors":"Jiajia Guo ,&nbsp;Yong Xiao ,&nbsp;Heng Ren ,&nbsp;Yongqiang Li ,&nbsp;Dianlong Yu ,&nbsp;Jihong Wen","doi":"10.1016/j.jsv.2025.119073","DOIUrl":"10.1016/j.jsv.2025.119073","url":null,"abstract":"<div><div>In recent years, the invention of metastructures has greatly promoted the low-frequency sound insulation technique. However, it is still a difficult task to design multifunctional metastructures that possess light weight, high load-bearing property, and good sound insulation performance at broadband low frequencies. To challenge this problem, this study presents a double-panel metastructure comprising two lightweight sandwich plates with lattice truss-core that are separated by an air gap. By perforating the faceplates of the sandwich plates, the double-panel metastructure can realize acoustic resonance without additionally introducing resonators. For efficient calculation and in-depth analysis of the double-panel metastructure, we develop a semi-analytical method by dynamic homogenization of the fluid and solid domains. The effectiveness of the modeling method is verified by comparing it with the vibroacoustic finite element method. The results of numerical examples demonstrate that the double-panel metastructure can exhibit two low-frequency sound insulation peaks. Within a broadband low-frequency range around the two peaks, the sound transmission loss of the double-panel metastructure is much higher than that of traditional double-panel structures and the mass law. Further, the influence of structural parameters is analyzed and an optimization procedure is conducted. Finally, the sound insulation of the metastructure and the load-bearing capacity of the separated sandwich plates are confirmed by comparative experiments.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"607 ","pages":"Article 119073"},"PeriodicalIF":4.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revisiting nonlinear impedance in acoustic liners","authors":"Rémi Roncen","doi":"10.1016/j.jsv.2025.119058","DOIUrl":"10.1016/j.jsv.2025.119058","url":null,"abstract":"<div><div>Acoustic liners are essential for sound dissipation in aeroacoustic applications, but their impedance response often displays significant nonlinearity under varying sound pressure levels. This study investigates the impact of complex source excitations on the nonlinear impedance of aeroacoustic liners. Using both experiments and the Impulse Response Time-Domain Impedance Boundary Condition (IR-TDIBC) model, the paper explores how varying spectral content, including multitone excitations with different phase configurations, influences the impedance characteristics of liners. Experimental results are compared with theoretical predictions, revealing strong alignment and highlighting the significant role of excitation phase and amplitude in shaping the impedance response. It is the time-domain instantaneous particle velocity at the liner interface that proves to be the primary determinant of the nonlinear response, and the sole input required by the IR-TDIBC.</div><div>Additionally, the influence of the shear grazing flow noise on the impedance is examined by superimposing a single-tone excitation on background flow noise at different Mach numbers. Flow-induced noise is found to increase resistance and decrease reactance, as observed in duct experiments, accounting for some of the changes in impedance under shear grazing flow conditions. These findings underscore the importance of considering both complex source excitations and flow-induced noise when modeling the impedance of aeroacoustic liners, with implications for improving the accuracy of impedance predictions in practical aeroacoustic applications.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"608 ","pages":"Article 119058"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lattice Boltzmann simulation of low-speed fans with sound absorbers using impedance boundary condition","authors":"Atsushi Imada ,&nbsp;Kazuya Kusano ,&nbsp;Kenichi Sakoda ,&nbsp;Kisho Hatakenaka ,&nbsp;Masato Furukawa","doi":"10.1016/j.jsv.2025.119066","DOIUrl":"10.1016/j.jsv.2025.119066","url":null,"abstract":"<div><div>This study investigated the feasibility of using impedance-based modeling in the lattice Boltzmann method (LBM) to simulate the flow and acoustic fields around low-speed fans equipped with sound absorbers. A boundary condition based on the bounce-back method was employed to integrate the impedance model into the LBM simulations, enabling easy application to complex geometries. Initially, the impedance boundary condition based on the bounce-back method was validated using the NASA Langley impedance tube. The simulation results demonstrated good agreement with both the experimental data and conventional LBM simulations, confirming the effectiveness of the bounce-back method for implementing the impedance boundary condition. Subsequently, this method was applied to aeroacoustic simulations of a cross-flow fan equipped with resonators and glass wool. The resonance frequencies of the resonators were tuned to match the blade-passing frequency of the fan, and the impedance characteristics of the sound absorbers were measured using an acoustic impedance tube. The results revealed that overfitting the impedance model to the low-frequency characteristics generated unphysical vortices at the boundaries. In contrast, proper fitting successfully simulated the sound absorption effects of the resonators and glass wool in the aeroacoustic simulations of the cross-flow fan.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"608 ","pages":"Article 119066"},"PeriodicalIF":4.3,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}