Journal of Sound and Vibration最新文献

{"title":"Numerical characterization of inclusion based acoustic meta-materials","authors":"Abhilash Sreekumar ,&nbsp;Fabien Chevillotte ,&nbsp;Emmanuel Gourdon","doi":"10.1016/j.jsv.2025.119432","DOIUrl":"10.1016/j.jsv.2025.119432","url":null,"abstract":"<div><div>Heterogeneous porous materials are widely used in building and transportation sectors. The heterogeneities arise due to recycling processes or are designed to include non-conventional phenomena (pressure diffusion, acoustic resonances, multiple-scattering, Bragg-interferences, sorption, etc.) involved in acoustical metamaterials. Detailed Finite Element Models (FEM) of such materials prove prohibitively expensive, especially when embedded in large structures. Although heterogeneous analytical methods address this issue, they exist only for specific, idealized scenarios; consequently a more robust generalization is achieved by generating a condensed transfer matrix (TMM) from a single unit cell FEM computation. The coupled TMM-FEM approach is further augmented by incorporating periodicity. However, the condensed TMM is useful but dependent on the excitation incident angle, i.e., it must be recomputed for each incidence. This work combines the condensed-TMM approach with a numerical characterization of equivalent intrinsic parameters. These equivalent parameters enable to analyse the involved physical phenomena at the macroscopic scale and to condense such heterogeneous material as a single layer in more complex structures. It is further showed, when dealing with FEM, that the proposed condensation has a high computational gain over the conventional full three-dimensional finite element approach, especially when dealing with excitations like diffuse field excitation. The accuracy and efficiency of the method, along with relevant examples will be discussed.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"619 ","pages":"Article 119432"},"PeriodicalIF":4.9,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004144","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":"Precise and low-cost computationally efficient method for operational modal analysis in wind turbines","authors":"Iñigo Vilella ,&nbsp;Gorka Gainza ,&nbsp;Miroslav Zivanovic ,&nbsp;Xabier Iriarte ,&nbsp;Aitor Plaza ,&nbsp;Alfonso Carlosena","doi":"10.1016/j.jsv.2025.119436","DOIUrl":"10.1016/j.jsv.2025.119436","url":null,"abstract":"<div><div>Structural Health Monitoring of wind turbines using Operational Modal Analysis techniques has become increasingly important in the wind industry. This importance is underscored by the fact that many installed wind farms are nearing the end of their operational lifespan and require life extension strategies that ensure safe operation. However, most existing techniques in the state of the art are either imprecise or necessitate complex calculations and high computational costs. These limitations often require extensive data extraction for external processing, the use of complex processors, and the engagement of external services for data analysis, posing significant challenges for wind farm owners. This paper presents an Operational Modal Analysis algorithm designed for Structural Health Monitoring of wind turbines, addressing the aforementioned issues. The proposed algorithm is highly computationally efficient, allowing for implementation on a low-cost electronic node that can autonomously analyze the structural health of the wind turbine with high precision. To achieve this, the algorithm employs a combination of techniques, some of which are novel, such as the modeling of modes and harmonic elimination using linear Kalman filters. Other techniques, such as the Random Decrement Technique and the Ibrahim Time Domain, are well-established in literature. However, the specific combination of these techniques as presented in this paper is also a novelty. All these techniques involve simple calculations, resulting in an efficient algorithm with low computational cost. Moreover, this paper validates the algorithm using both synthetic signals from OpenFAST and real signals from wind turbines. The results are highly satisfactory, outperforming leading techniques in this context and confirming the algorithm's precision. Notably, the algorithm excels in damping estimation, a challenging aspect of Operational Modal Analysis applied to wind turbines, for which no existing Operational Modal Analysis techniques provide precise estimates. In conclusion, the algorithm presented in this paper offers a precise, efficient, and low-cost solution for Structural Health Monitoring of wind turbines, eliminating the need for extensive data processing and external analysis, thereby simplifying and improving the maintenance and operation of wind farms.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"620 ","pages":"Article 119436"},"PeriodicalIF":4.9,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047634","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":"Perturbation analysis of natural oscillations of elastic structures with damage","authors":"Yury Vetyukov","doi":"10.1016/j.jsv.2025.119429","DOIUrl":"10.1016/j.jsv.2025.119429","url":null,"abstract":"<div><div>A mathematical justification is given for the energy based approach to estimating the changes in the natural frequencies of an elastic structure when a small flexibility or mass is added. In particular, we consider the situation where the vibration modes of the perturbed structure are not kinematically admissible for the original one. Local damage (cracks), imperfect boundary conditions (elastic supports instead of ideal ones), shear compliance of a beam or of a plate are examples of such structural changes. The rigorous asymptotic procedure establishes a relationship between the frequency shift and the complementary energy of the added compliance calculated for the vibration mode of the original structure, whatever its type, be it a rod, a plate or a shell. Special treatment is required in case of repeated (multiple) natural frequencies. Examples ranging from simple toy models to a practically relevant model of a plate with a crack are demonstrated. The approach is particularly efficient when the effort for the vibration analysis of the original structure is essentially lower than that of the perturbed one. Parametric studies with varying damage severity and configuration result as a post-processing of a single solution for the unperturbed structure.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"619 ","pages":"Article 119429"},"PeriodicalIF":4.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996738","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":"Ray tracing via Snellius","authors":"Oskar Bschorr ,&nbsp;Alessandro Bassetti","doi":"10.1016/j.jsv.2025.119398","DOIUrl":"10.1016/j.jsv.2025.119398","url":null,"abstract":"<div><div>A wave travelling between two media denoted by different wave propagation velocities is subject to refraction at the interface between the media. The refraction is regulated by the Snellius law, where the interface is assumed infinitesimally thin. The jump in propagation velocity at the interface results in a discontinuous propagation direction for the wave. We consider a continuously changing medium, where the wave propagation velocity is assumed to be a continuous field. We reduce the Snellius law to its linear expansion at the interface between two regions of the medium with infinitesimally different propagation velocities. The linearised Snellius law connects the curvilinear coordinates associated with the propagation process from a point source and the spatial distribution of the propagation velocity. The coordinates map the rays evolving from the source and the wavefronts, orthogonal to the rays. Curved rays determine local osculating planes, spanned by the tangent to the ray and the gradient of the propagation velocity. The wavefront curvature is determined parallel to the tracing of each ray. Intersections of the wavefront are considered, with the osculating plane and with the longitudinal plane of the ray. For curved rays, the determined wavefront curvatures are different for the different planes. A numerical implementation of the model is used to approach an exemplary test case, regarding sound radiation in a stratified medium.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"621 ","pages":"Article 119398"},"PeriodicalIF":4.9,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047635","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":"Piezoelectric floating mass transducer as micro actuator working with magnetorheological elastomer","authors":"R. Rusinek ,&nbsp;S. Lenci","doi":"10.1016/j.jsv.2025.119388","DOIUrl":"10.1016/j.jsv.2025.119388","url":null,"abstract":"<div><div>This study analyzes the application of a piezoelectric floating mass transducer (FMT) combined with a magnetorheological elastomer (MRE) for exciting the ossicular chain and general mechanical systems. The results highlight the effectiveness of the FMT in inducing vibrations, further enhanced by the adaptive properties of the MRE, making it a promising option for broader engineering and biomedical applications, including hearing restoration devices. The study confirms that resonance tuning and the magnetic field-dependent properties of the MRE are crucial for optimizing vibration performance, significantly affecting energy transfer, while the MRE provides additional control over stiffness and damping. Compared to conventional actuators, the FMT-MRE system offers advantages in terms of frequency adaptability, though challenges remain due to nonlinear behaviors induced by MRE hysteresis. The full practical implementation is limited by the occurrence of irregular vibrations and bistability under high-voltage excitations. Firstly, a simplified 1-degree-of-freedom pure MRE system modeled with the Bouc–Wen component is analyzed at low and high excitation frequency. Next, application for the middle ear implants is studied in case of linear and nonlinear system.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"619 ","pages":"Article 119388"},"PeriodicalIF":4.9,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144926191","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":"Motion-dependent modal analysis of flexible-joint mechanisms","authors":"Jianning Yang,&nbsp;Fan Meng,&nbsp;Xiao Wang,&nbsp;Hanwen Song","doi":"10.1016/j.jsv.2025.119416","DOIUrl":"10.1016/j.jsv.2025.119416","url":null,"abstract":"<div><div>Conventional modal analysis of flexible-joint mechanisms often overlooks motion-induced inertial and Coriolis effects. These effects inherently render the system non-self-adjoint, resulting in dynamic characteristics that differ from those of stationary states. To address this, motion-dependent modal analysis is proposed for flexible-joint mechanisms, where modal parameters are parameterized instantaneously by the states of rigid-body motion. First, a generalized dynamic equation of 2n dimensions is formulated, which incorporates both motor dynamics and feedforward-feedback control. Then, the vibration model is derived through Taylor expansion around arbitrary dynamic equilibrium states. Based on this motion-dependent vibration model with time-varying matrices, state space formulations are developed to define instantaneous modal parameters under arbitrary motion conditions. Subsequently, the influence of rigid-body motion on the vibrational characteristics is analyzed and verified with a 2-DOF mechanism. Finally, the model is applied to calculate the instantaneous modal parameters of a 6-DOF mechanism, verifying that the effect of rigid–flexible coupling is non-negligible under high-speed motion. The results show that the first-order frequency of the system can be reduced by 15.4% under high-speed motion, and Coriolis effects may induce instantaneous negative damping.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"619 ","pages":"Article 119416"},"PeriodicalIF":4.9,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916398","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":"Modulation mechanism of vibration response of RV reducer considering the influence of meshing force and transmission path","authors":"Huageng Luo ,&nbsp;Linlin Xue ,&nbsp;Yukun Huang ,&nbsp;Chenglong Wang ,&nbsp;Gang Wang ,&nbsp;Xinyue Zhang ,&nbsp;Jian Guan ,&nbsp;Limin Wang","doi":"10.1016/j.jsv.2025.119430","DOIUrl":"10.1016/j.jsv.2025.119430","url":null,"abstract":"<div><div>The complexity of RV reducer transmission structure leads to complicated amplitude modulation in the vibration response during operations. A thorough understanding of the modulation mechanism in its vibration response is crucial for the design improvement and health monitoring. This paper first uses the Fourier series expansion based method to explore the modulation effect in the vibration response and the frequency composition in the resultant from the perspective of individual meshing force. Subsequently, the transmission path of the vibration signal between the meshing elements and the sensor is analyzed and kinematic model is then established. Analysis and simulation results indicate that the planetary gear meshing element meshing response is modulated by the carrier rotation frequency, while the cycloid-pin gear meshing response is modulated by the crankshaft rotation frequency. As the vibration signal from the meshing element transmitted through a time-varying path, the vibration signal is further modulated to form a complicated composite modulation. Finally, an RV reducer test bench is utilized to demonstrate the proposed model. The developed model provides a useful tool for understanding the vibration modulation mechanism of RV reducer and lays the foundation for subsequent development of fault diagnosis technology.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"619 ","pages":"Article 119430"},"PeriodicalIF":4.9,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996737","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":"Dynamic modal rotation method with inertial nonlinearity for large deformation analysis of slender structures","authors":"Yoshitaka Shizuno,&nbsp;Ryo Kuzuno,&nbsp;Naruya Nagai,&nbsp;Motonobu Kawai,&nbsp;Shugo Kawashima,&nbsp;Yukito Kodama,&nbsp;Kanjuro Makihara,&nbsp;Keisuke Otsuka","doi":"10.1016/j.jsv.2025.119427","DOIUrl":"10.1016/j.jsv.2025.119427","url":null,"abstract":"<div><div>As high-aspect-ratio wings can suppress induced drag, they are used for next-generation aircraft such as high-altitude long-endurance (HALE) aircraft. High-fidelity models such as nonlinear shell/plate or solid finite element models, which analyze large dynamic deformations with many degrees of freedom, are computationally intensive. The modal rotation method (MRM) is a static analysis method that efficiently analyzes large deformations based on modes and stiffness matrices obtained from any linear or linearized model. MRM targets slender structures with small strains and large displacements and considers geometrical nonlinearity rather than material nonlinearity. Dynamic MRM (DMRM), which was developed by extending the MRM to a dynamic analysis method, can efficiently perform nonlinear dynamic analyses using a modal approach. However, the conventional DMRM was formulated under the assumption that the inertial nonlinearity can be neglected. In this study, a novel DMRM that takes inertial nonlinearity into account was proposed. To achieve this, emphasis was placed on the similarities between MRM and rigid multibody systems. In addition, a damping term has been included in the equation of motion in the proposed method. This enables a comparison between the analytical results of the proposed method and the experimental results with damping effects. The proposed method can account for the inertial nonlinearity in a simulation performed and reduce the calculation time by 98% compared to the nonlinear plate finite element method. Moreover, the proposed method with damping showed good agreement with the experimental results for large beam deformations.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"619 ","pages":"Article 119427"},"PeriodicalIF":4.9,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145004146","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":"Nonparametric model and response analysis of the complex uncertain pipeline-casing system","authors":"Jishi Li ,&nbsp;Dayi Zhang ,&nbsp;Qicheng Zhang ,&nbsp;Binghui Huo ,&nbsp;Xin Wang","doi":"10.1016/j.jsv.2025.119431","DOIUrl":"10.1016/j.jsv.2025.119431","url":null,"abstract":"<div><div>The external pipeline system of an aero-engine comprises numerous components with parameter uncertainties, exhibiting high-dimensional uncertainty. When coupled with the casing, it significantly affects the system’s vibration response. This paper incorporates such complex pipeline system into casing vibration environment analysis. For complex systems, parametric models prove computationally expensive and limited to known uncertainties, reducing their suitability. In contrast, nonparametric models grounded in random matrix (RM) theory - typically employed for non-parameterizable uncertainties - show strong potential for high-dimensional uncertainty problems. However, conventional nonparametric RM models contain practically meaningless entries, introducing deviations from true physical systems. To address this, this paper proposes a filtered nonparametric model that improves upon the direct nonparametric approach. The filtering process, requiring only entry-wise operations, further enhances computational efficiency. The paper establishes nonparametric models to characterize high-dimensional parameter uncertainty in the pipeline system, and provides an efficient unified framework for coupled pipeline-casing system response prediction. 2D and 3D numerical examples based on real aero-engine structures are developed. The results show that the proposed filtered method effectively avoids the error divergence observed in the direct method, achieving closer alignment with full parametric benchmarks. The validated asymptotic consistency - demonstrated by converging nonparametric and parametric results with increasing uncertainty dimensionality - establishes that nonparametric models can effectively characterize high-dimensional parametric uncertainties, extending their utility beyond conventional non-parameterizable uncertainty applications.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"621 ","pages":"Article 119431"},"PeriodicalIF":4.9,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026338","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":"Nonlinear dynamic analysis of a viscoelastic rotating cantilever beam under stochastic perturbation","authors":"Xudong Gu ,&nbsp;Shuai Li ,&nbsp;Bingxin Zhao ,&nbsp;Zichen Deng","doi":"10.1016/j.jsv.2025.119428","DOIUrl":"10.1016/j.jsv.2025.119428","url":null,"abstract":"<div><div>The dynamic characteristics of rotating beams significantly affect the performance of equipment with rotating components, such as flexible wires of spacecrafts, steam turbines and helicopter rotors. The coupling of nonlinear deformation and viscoelastic materials will lead to integral-containing nonlinear viscoelastic terms, which have been overlooked in previous studies. Departing from conventional studies, this paper investigated the nonlinear dynamics of a rotating viscoelastic cantilever beam under stochastic excitation. A new nonlinear dynamic equation is established by integrating nonlinear deformation, rotation effect, and viscoelastic constitution in the modeling process, which is transformed into a set of nonlinear stochastic differential equations with integral viscoelastic terms using the assumed mode method. Numerical simulations and stochastic linearization method are used to analyze the multimodal response of the rotating cantilever beam, in which the results showed that the primary mode vibration dominates the dynamic response. Thus, a theoretical method based on stochastic averaging method is proposed to derive the approximate responses of the primary mode. The nonlinear viscoelastic terms resulting from the coupling of nonlinear deformation and viscoelasticity are converted into a combination of the amplitude-dependent modified damping and conservative forces. Analytical responses are obtained by solving the Fokker-Planck-Kolmogorov (FPK) equation. Finally, the impacts of excitation intensity, damping ratio, rotational angular velocity and viscoelastic parameters on the system response are comprehensively analyzed. The high consistency between the theoretical predictions and numerical simulations validates the effectiveness of the proposed analytical method, which facilitates a deeper understanding the dynamic behavior of viscoelastic rotating beams.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"619 ","pages":"Article 119428"},"PeriodicalIF":4.9,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144926190","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}