Journal of Sound and Vibration最新文献

{"title":"Acoustic leak localisation based on multipath identification","authors":"Ndubuisi Uchendu,&nbsp;Jennifer M. Muggleton,&nbsp;Paul R. White","doi":"10.1016/j.jsv.2025.118970","DOIUrl":"10.1016/j.jsv.2025.118970","url":null,"abstract":"<div><div>This paper proposes a method for estimating wave speed and locating leaks in water pipes using multipath identification techniques. The wave speed and leak location are determined simultaneously from the relative arrival times of reflections in acoustic leak signals. Two multipath identification techniques based on the autocorrelation function and power cepstrum are derived and analysed for identifying reflections. Results show that the power cepstral technique is more robust and accurate than the autocorrelation technique. Analysis of simulation and experimental data acquired on a leakage test rig demonstrates that the proposed method is effective for locating leaks, outperforming the commonly used cross-correlation method in some cases. A practical advantage of the proposed method is capability to locate leaks without a priori knowledge of the wave speed.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"602 ","pages":"Article 118970"},"PeriodicalIF":4.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157852","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":"Corrigendum to “A dual-mode hybrid magnetic high-static-low-dynamic stiffness vibration isolator” [ Journal of Sound and Vibration 599C (2025) 118906]","authors":"Ming Zhang ,&nbsp;Hongtao Li ,&nbsp;Lei Zhang ,&nbsp;Feng Sun ,&nbsp;Xingwei Sun ,&nbsp;Koichi Oka","doi":"10.1016/j.jsv.2025.118949","DOIUrl":"10.1016/j.jsv.2025.118949","url":null,"abstract":"","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"602 ","pages":"Article 118949"},"PeriodicalIF":4.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157851","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 vibrations of kinematically exact curved beams","authors":"Stefano Lenci ,&nbsp;Lukasz Kloda","doi":"10.1016/j.jsv.2025.118951","DOIUrl":"10.1016/j.jsv.2025.118951","url":null,"abstract":"<div><div>The nonlinear oscillations of a kinematically exact curved beam are investigated by means of the multiple time scale method applied directly to partial differential equations of motion. A linear constitutive behaviour is assumed, and the bending strain is the (change of) mechanical curvature. A dependence of natural frequencies <span><math><msub><mrow><mi>ω</mi></mrow><mrow><mi>i</mi></mrow></msub></math></span> and nonlinear correction coefficients <span><math><mrow><mi>n</mi><mi>c</mi><msub><mrow><mi>c</mi></mrow><mrow><mi>i</mi></mrow></msub></mrow></math></span> (describing the nonlinear behaviour of the beam) on the initial curvature <span><math><mi>α</mi></math></span> is investigated for the first six modes for a case of hinged–hinged boundary conditions. The occurrence of internal resonances is discussed, and a complex behaviour of the functions <span><math><mrow><mi>n</mi><mi>c</mi><msub><mrow><mi>c</mi></mrow><mrow><mi>i</mi></mrow></msub><mrow><mo>(</mo><mi>α</mi><mo>)</mo></mrow></mrow></math></span> is illustrated in detail. A comparison is made with the results obtained by the single mode Galerkin approximation, showing that the latter yields incorrect results. Finally, the analytical solution is validated by comparing it with numerical simulations obtained by the finite element method.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"602 ","pages":"Article 118951"},"PeriodicalIF":4.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157850","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":"Parametric resonance threshold regulation based on electrothermal effect","authors":"Youliang Xu ,&nbsp;Xuefeng Wang ,&nbsp;Zhan Shi ,&nbsp;Zunhao Xiao ,&nbsp;Yutao Xu ,&nbsp;Zhonghua Liu ,&nbsp;Xueyong Wei ,&nbsp;Ronghua Huan","doi":"10.1016/j.jsv.2025.118961","DOIUrl":"10.1016/j.jsv.2025.118961","url":null,"abstract":"<div><div>Parametric resonance, with its remarkable signal amplification capabilities, holds great potential in areas such as sensing, warning detection, and energy harvesting. However, its practical applications are limited by the high excitation threshold required to trigger parametric resonance and the narrow instability region in which it occurs. To address this limitation, this paper presents a method for tuning the parametric resonance threshold in micro-resonators based on the electrothermal effect. The nonlinear dynamic model for a parametric excited micro-resonator is established. Theoretical analysis is conducted to reveal the influence of frequency and damping on the parametric instability region, which indicates that reducing the vibration frequency can decrease the parametric instability threshold while expanding the parametric instability region. Subsequently, the electrothermal current is applied to the body of the micro-resonator. The influence of the electrothermal effect on the dynamic behavior of the resonator is investigated. It is observed that the vibration frequency could be reduced from 125 kHz to 25 kHz, and the rate of frequency change accelerates under high current condition. Finally, the electrothermal effect is used to regulate both the threshold and bandwidth of the parametric instability region. Experimental results demonstrate that, under frequency-sensitive conditions, the electrothermal effect effectively reduces the threshold by 71% and broadens the instability region's bandwidth. This study is expected to provide technical support for the practical applications of parametric resonance.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"602 ","pages":"Article 118961"},"PeriodicalIF":4.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157849","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 refined multi-scale analysis of complex systems using frequency detuning: Perturbation around a nonlinear problem","authors":"Yasai Nie ,&nbsp;Tieding Guo ,&nbsp;Stefano Lenci","doi":"10.1016/j.jsv.2025.118963","DOIUrl":"10.1016/j.jsv.2025.118963","url":null,"abstract":"<div><div>The <em>frequency detuning</em> idea is further examined and fully extended to develop a refined multi-scale analysis procedure for more generic nonlinear systems of an inertially/damping/geometrical nonlinear type, aiming for a superior performance of predicting high-amplitude nonlinear responses, at the same time, without requiring a higher-order perturbation development. Briefly, frequency detuning means weakly nonlinear analysis/expansion is unfolded around a <em>nonlinear</em> oscillation problem, which is associated with a <em>nonlinear</em> (<em>response</em>) <em>frequency</em> rather than the commonly used linear frequency (i.e., perturbation around a nonlinear problem). Both frequency response curves (FRCs) and backbone curves (BBCs) are leveraged for a full comparison study regarding (frequency) detuned vs. traditional multi-scale methods (dMSM vs. MSM), with reference to numerical ones for verification. The results demonstrate superiority of dMSM in high-amplitude region when frequency detuning is employed.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"603 ","pages":"Article 118963"},"PeriodicalIF":4.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143232660","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":"Modeling of bolted connection characteristics and nonlinear response analysis of a rotor system under the effect of bolted connection and maneuver loads","authors":"Wujiu Pan ,&nbsp;Junkai Hao ,&nbsp;Junyi Wang ,&nbsp;Jianwen Bao ,&nbsp;Xianjun Zeng ,&nbsp;Peng Nie","doi":"10.1016/j.jsv.2025.118956","DOIUrl":"10.1016/j.jsv.2025.118956","url":null,"abstract":"<div><div>Bolted connections have the advantages of simple structure, strong operability, convenient installation, and good connection rigidity, making them widely used in rotor connection structures of aircraft engines. This paper first thoroughly analyzes the transmission path of internal forces in bolted connection structures, calculates the stiffness of the connected parts, thread stiffness, bolt stiffness, and contact surface stiffness, and establishes an equivalent stiffness model for bolted connections. Then, considering the maneuver loads of horizontal yaw and the nonlinear Hertz contact force of rolling bearings, a dynamic model of the rotor system under the coupling effect of bolted connection and maneuver loads was proposed. Finally, the Newmark- <em>β</em> numerical method was used to solve the system response, and the effects of equivalent connection stiffness and maneuver loads of bolted connections on the overall system were studied. The research results indicate that: The equivalent stiffness of bolted connection reduces the overall stiffness of the shaft to a certain extent, and nonlinear response occurs near the critical speed. When the speed exceeds the critical speed, the system enters complex nonlinear motion. The system with equivalent stiffness of bolted connections enters twice the cycle later than the system without equivalent stiffness of bolted connections. As the equivalent stiffness of bolted connection increases, the nonlinearity of the system weakens. At the same time, it is accompanied by the following changes: the period doubling bifurcation point shifts backward. The critical speed of the system increases. The low-frequency component decreases and the frequency decreases. In the horizontal yaw maneuver flight state, the system generates rich nonlinear dynamic phenomena such as period doubling, quasi period, and chaotic motion near twice the critical speed. As the maneuver loads <em>G</em> increases, the main resonance speed increases, indicating that the presence of the maneuver loads increases the stiffness of the shaft. The vibration of the rotor significantly increases, which may cause friction between the rotor and stator in the horizontal direction. This paper provides a basis for predicting the nonlinear response of bolted rotor system under maneuver loads, in order to provide reference for efficient and accurate research on the dynamic characteristics of bolted structures.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"604 ","pages":"Article 118956"},"PeriodicalIF":4.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143141054","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 multi-modal and configuration-dependent chatter prediction approach for a milling robot","authors":"Bo Li ,&nbsp;Wei Zhao ,&nbsp;Zan Li ,&nbsp;Yu Zhao ,&nbsp;Yunfei Miao ,&nbsp;Wei Tian ,&nbsp;Wenhe Liao","doi":"10.1016/j.jsv.2025.118955","DOIUrl":"10.1016/j.jsv.2025.118955","url":null,"abstract":"<div><div>In robotic milling for aerospace large and complex cabin structural components, chatter can significantly impair the surface quality of workpieces, and in severe cases even result in tool damage. To mitigate chatter-related issues, the selection of appropriate process parameters using Stability Lobe Diagrams (SLDs) is a widely employed and effective strategy. Nevertheless, most prior investigations have primarily focused on regenerative chatter in specific robotic configurations, often disregarding the impact of low-frequency chatter originating from the inherent structural modes of the robot and its configuration-dependent dynamics. A novel approach for predicting the multi-modal stability of milling robots across their entire workspace is presented in this study. By integrating multibody dynamics model and regenerative chatter theory, this approach comprehensively accounts for the vibrations of the robotic milling system, which encompasses both the robotic structure and the tool, as well as the influence of multi-order modal variations. Moreover, a new representation method for the stability cloud map is suggested. Utilizing the multibody system transfer matrix method, a dynamics model is formulated to accommodate alterations in configurations. Additionally, a grid-based dynamic parameter identification method is proposed to predict frequency response functions under different robotic configurations. The chatter stability prediction model is integrated with the dynamics model to establish a multi-modal driven SLD. Finally, the correctness of the proposed robotic dynamics model and the effectiveness of the multi-modal SLDs with variable configurations are validated through modal and milling experiments conducted on an industrial robot.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"603 ","pages":"Article 118955"},"PeriodicalIF":4.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143150","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":"Prediction of human-induced structural vibration using multi-view markerless 3D gait reconstruction and an enhanced bipedal human-structure interaction model","authors":"Huiqi Liang ,&nbsp;Yijing Lu ,&nbsp;Wenbo Xie ,&nbsp;Yuhang He ,&nbsp;Peizi Wei ,&nbsp;Zhiqiang Zhang ,&nbsp;Yuxiao Wang","doi":"10.1016/j.jsv.2025.118931","DOIUrl":"10.1016/j.jsv.2025.118931","url":null,"abstract":"<div><div>In the context of advancing material engineering and construction technology, structures are evolving to be lightweight, giving rise to a heightened focus on human-induced vibration serviceability. Despite the availability of various Human-Structure Interaction (HSI) models, integrating outdoor tests with these models remains challenging due to the lack of a comprehensive testing framework. Existing methods heavily rely on invasive wearable sensors, lacking non-invasive alternatives. To bridge this gap, this paper proposed an outdoor testing framework for evaluating human-induced structural vibrations. Using a 2D body keypoints detection network, human gaits were captured from multiple viewpoints, representing it with the Skinned Multi-Person Linear Model (SMPL) model through triangulation and optimization. Gait and walking force data from 30 participants were analyzed using a Long Short-Term Memory (LSTM) network to classify landing states, which indicate whether both feet are in contact with the structure. Extending a bipedal HSI model from 1D to a 2D structure, walking tests were conducted on a 19.8 m × 2.35 m outdoor footbridge to update dynamic properties. Results showed over 90 % accuracy in predicting human landing states and within 10 % relative Root Mean Square Error (RMSE) in predicting pedestrian vertical walking force. Comparing models with and without HSI, disparities of 20 % to 60 % in frequency changes and 50 % to 180 % in damping ratio values were observed. The proposed non-invasive method predicted vertical structural vibration response with &lt;10 % error, outperforming cases that used walking loads from force-measuring insoles without accounting for time-varying dynamics. These findings affirmed the feasibility and accuracy of our multi-view, non-invasive human gait acquisition method coupled with the improved bipedal HSI model in human-induced vibration prediction.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"602 ","pages":"Article 118931"},"PeriodicalIF":4.3,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157846","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":"Active structural cloaking using equivalent feedback cancellation","authors":"Hiroyuki Iwamoto ,&nbsp;Nathan Wendt ,&nbsp;Yuki Takahashi ,&nbsp;Nicole Kessissoglou","doi":"10.1016/j.jsv.2025.118950","DOIUrl":"10.1016/j.jsv.2025.118950","url":null,"abstract":"<div><div>A novel concept of active structural cloaking based on equivalent feedback cancellation is proposed for coupled vibratory systems. The cloaking strategy is demonstrated on the simplest case of a two degree-of-freedom (2DOF) lumped parameter system composed of a main (primary) structure and an attached (secondary) structure. The target output of the coupled system corresponds to the response of the primary mass in the absence of the attached structure. The equations of motion for the 2DOF system are presented, from which a velocity feedback control law for structural cloaking is identified. With feedback cancellation, the primary mass is effectively decoupled from the secondary mass. New resonances for each mass are observed. The active structural cloaking approach is shown to be stable.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"602 ","pages":"Article 118950"},"PeriodicalIF":4.3,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157842","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":"Modal properties of mechanical systems under geometric variations by perturbation theory","authors":"Javier González-Monge ,&nbsp;Abdelhakim Bouras ,&nbsp;Luigi Carassale","doi":"10.1016/j.jsv.2025.118942","DOIUrl":"10.1016/j.jsv.2025.118942","url":null,"abstract":"<div><div>The availability of analytical expressions to obtain the system matrices of mechanical components subject to small geometric variations (Bouras and Carassale (2024)) enables efficient solutions of several technical problems, including uncertainty propagation and shape optimization. An important step to tackle these problems is the calculation of the modal properties of the modified system. This can be done by relying on system matrices that are expressed through approximations such as power series. This paper starts from a motivational example showing some unexpected results and then studies the mathematical problem using a perturbation approach. This formulation provides analytic expressions for the corrections up to the second order of the eigenpairs of systems whose matrices depend on a small parameter. The results obtained can be related to known expressions for the derivatives of eigenvalues and eigenvectors both for the case of isolated modes, as well as for repeated eigenvalues. Besides, the technically relevant case of closely-spaced modes is considered. On the other hand, the perturbation analysis enables the discussion of the relative importance of the terms contained in the asymptotic expressions and explains some previously obtained numerical results.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"601 ","pages":"Article 118942"},"PeriodicalIF":4.3,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175522","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}