Journal of Sound and Vibration最新文献_第10页

Dynamically amplified whirling string actuator 动态放大旋弦传动器

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-17 DOI: 10.1016/j.jsv.2024.118826

Igor Berinskii, Slava Krylov

引用次数: 0

Investigation of an Impact-buffered Viscous Damper: A new mechanical model, experiments, and numerical simulations 冲击缓冲粘滞阻尼器的研究：新机械模型、实验和数值模拟

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-17 DOI: 10.1016/j.jsv.2024.118852

Yifei Zhang , Yong Ding , Guoshan Xu

{"title":"Investigation of an Impact-buffered Viscous Damper: A new mechanical model, experiments, and numerical simulations","authors":"Yifei Zhang , Yong Ding , Guoshan Xu","doi":"10.1016/j.jsv.2024.118852","DOIUrl":"10.1016/j.jsv.2024.118852","url":null,"abstract":"<div><div>This paper introduces a new mechanical model and presents experimental investigations for impact-buffered viscous dampers (IBVDs). A multi-degree-of-freedom bridge system is employed for numerical analysis, investigating the vibration control and impact characteristics of IBVDs. The experimental results closely align with theoretical predictions, with errors of 4.33 % for maximum positive force and 6.73 % for energy dissipation. When the displacement amplitude is greater than or equal to 6 mm, the equivalent viscous damping ratio of the IBVD decreases with the displacement amplitude. Numerical simulations show that IBVDs reduce the maximum acceleration of the girder and the maximum impact force by 20 % and 24 %, respectively. Compared to conventional viscous dampers, IBVDs demonstrate superior vibration control in terms of base shear and girder displacement. An appropriately designed IBVD can dissipate energy comparably to a conventional viscous damper during design-basis earthquakes while also providing enhanced cushioning against sudden collisions in more severe earthquakes.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118852"},"PeriodicalIF":4.3,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707410","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}

引用次数: 0

Evolution of modal properties in the non-proportionally damped coupled vehicle–bridge system 非比例阻尼耦合车桥系统的模态特性演变

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-17 DOI: 10.1016/j.jsv.2024.118803

Shiyi Mei , Daniel Cantero , Colin Caprani

{"title":"Evolution of modal properties in the non-proportionally damped coupled vehicle–bridge system","authors":"Shiyi Mei , Daniel Cantero , Colin Caprani","doi":"10.1016/j.jsv.2024.118803","DOIUrl":"10.1016/j.jsv.2024.118803","url":null,"abstract":"<div><div>The modal properties of bridges are crucial parameters in engineering applications, and their variation caused by moving vehicles has been increasingly recognized in recent years. However, existing closed-form analytical expressions for the varying modal properties during vehicle passage exist only for simple structural configurations. This paper proposes an innovative method for analyzing the instantaneous modal properties of the system, considering general boundary conditions and the damping effect. First, only general boundary conditions are considered, and the results show that the location of the maximum system frequency shift depends on the mode shape. Then the damping effect is considered, observing that the system is non-proportionally damped in most cases, making it difficult to obtain a closed-form solution using existing methods. To solve this, we transform the system of second-order ordinary differential equations into a set of fourth-order ordinary differential equations and derive the closed-form solution for system’s modal properties. Based on this solution, we introduce the concept of Critical Coupling Damping (CCD), which defines the transition between the coupled description and the moving mass case. This work deepens understanding of changing modal properties during the traverse of sprung masses, and so has numerous potential engineering applications.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118803"},"PeriodicalIF":4.3,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707409","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}

引用次数: 0

Enhancing gearbox fault diagnosis under phase estimation errors: A dynamic time warping and blind deconvolution approach 加强相位估计误差下的齿轮箱故障诊断：动态时间扭曲和盲解卷方法

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-17 DOI: 10.1016/j.jsv.2024.118851

Taehyung Kim , Jongmin Park , Jinoh Yoo , Jong Moon Ha , Byeng D. Youn

{"title":"Enhancing gearbox fault diagnosis under phase estimation errors: A dynamic time warping and blind deconvolution approach","authors":"Taehyung Kim , Jongmin Park , Jinoh Yoo , Jong Moon Ha , Byeng D. Youn","doi":"10.1016/j.jsv.2024.118851","DOIUrl":"10.1016/j.jsv.2024.118851","url":null,"abstract":"<div><div>The blind deconvolution technique is widely used to extract subtle fault-related features from the noisy vibration signals of rotating machinery. However, utilizing conventional Minimum Entropy Deconvolution (MED) methods is challenging for analyzing gearboxes, where significant internal and external non-Gaussian disturbance signals are inherent. Although periodicity analysis with signal alignment can be employed to solve this challenge, most available methods require exact phase information for the signals; this must be measured by a specially installed encoder system. To address this issue, this paper introduces a novel method for the fault diagnosis of gearboxes that effectively addresses the significant challenge of extracting periodic fault characteristics from noisy vibration signals, particularly in scenarios characterized by significant phase estimation errors and without the need for an encoder system. By combining the strengths of blind deconvolution with Dynamic Time Warping (DTW)-based sequential signal alignment, our method facilitates the identification and alignment of samples with identical rotational phases. This approach enables the distinction between impulsive features caused by faults and those resulting from noise, thus overcoming the limitations of conventional techniques, which fail to extract periodic fault characteristics under phase estimation errors. The effectiveness of the proposed approach is verified through analytic simulation and experimental validation using data from 2-kW planetary gearbox testbeds at Seoul National University (SNU) and the Korea Research Institute of Standards and Science (KRISS). Results demonstrate the superiority of the proposed method for identifying fault conditions under significant phase estimation errors compared to conventional methods.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"598 ","pages":"Article 118851"},"PeriodicalIF":4.3,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703225","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}

引用次数: 0

Theoretical and numerical study of the thermo-mechanical coupling effect on the fluid viscous damper 流体粘性阻尼器的热机械耦合效应的理论和数值研究

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-16 DOI: 10.1016/j.jsv.2024.118846

Shangtao Hu , Hong Hao , Dongliang Meng , Menggang Yang

{"title":"Theoretical and numerical study of the thermo-mechanical coupling effect on the fluid viscous damper","authors":"Shangtao Hu , Hong Hao , Dongliang Meng , Menggang Yang","doi":"10.1016/j.jsv.2024.118846","DOIUrl":"10.1016/j.jsv.2024.118846","url":null,"abstract":"<div><div>The fluid viscous damper (FVD) is a typical passive energy dissipation device applied to civil engineering structures for vibration control. However, the heat generated during its operation will alter the properties of the fluid, thereby affecting the damping force. This study explores the thermo-mechanical coupling effect on the performance of the FVD. A theoretical model is developed based on fluid dynamics and thermodynamics to reflect the interaction between the real-time damping force and temperature of the FVD. Computational fluid dynamics (CFD) simulations are performed to investigate the impact of the thermo-mechanical coupling effect on the hysteresis performance of the damper and validate the proposed calculation method. The dynamic behavior and vibration mitigation effectiveness of the FVD considering the thermo-mechanical coupling effect are examined based on time history analysis on a single-degree-of-freedom and a multi-degree-of-freedom system. The results indicate that the increased temperature will lead to a reduction in the damping force, while the degraded force will in turn slow the temperature rise. Long-duration and high-intensity excitations can significantly amplify the impact of the thermo-mechanical coupling effect, thus it is essential to be considered in designing dampers for loads in the service stage and major earthquakes. The thermo-mechanical coupling effect on the supplemental damping ratio of the damper is greater than that on structural response control effectiveness, thereby it cannot be neglected when the damping ratio is used as the design criterion for FVDs.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118846"},"PeriodicalIF":4.3,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699116","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}

引用次数: 0

Ultra-low frequency active vibration isolation system with quasi-zero stiffness characteristic using self-tuning filter-based feedforward control 利用基于自整定滤波器的前馈控制，实现具有准零刚度特性的超低频主动隔振系统

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-16 DOI: 10.1016/j.jsv.2024.118848

Tian-Yi Li , Cheng-Long Yu , Xu-Yang Yu , Bin Li , Bo Zhao , Jiu-bin Tan

{"title":"Ultra-low frequency active vibration isolation system with quasi-zero stiffness characteristic using self-tuning filter-based feedforward control","authors":"Tian-Yi Li , Cheng-Long Yu , Xu-Yang Yu , Bin Li , Bo Zhao , Jiu-bin Tan","doi":"10.1016/j.jsv.2024.118848","DOIUrl":"10.1016/j.jsv.2024.118848","url":null,"abstract":"<div><h3>Purpose of study</h3><div>This study aims to resolve the compromise between low suspension stiffness and high load-bearing capability in vibration isolation and enhance the suppression performance of ultra-low frequency vibration through advanced active feedforward control methods, featuring high-performance precision isolation for large-scale ultra-precision instruments.</div></div><div><h3>Describe methods</h3><div>An air-magnetic hybrid parallel configuration of positive and negative stiffness is employed to achieve adjustable stiffness, endowing the vibration isolation system with quasi-zero stiffness characteristics. A novel self-tuning feedforward control strategy is proposed through a self-tuning filter to update the controller parameters online, minimizing the loss caused by model uncertainties.</div></div><div><h3>Results</h3><div>The vertical and horizontal natural frequencies of the system exhibit a remarkably low resonance frequency of lower than 0.5 Hz. With the self-tuning feedforward strategy, the maximum vibration attenuation reaches 78 dB in the vertical direction and 70 dB in the horizontal direction, reducing the cumulative power at 100 Hz by 61.4 % and 47.8 %, respectively. The above results showcase the proposed approach with excellent performance in isolating low-frequency vibrations.</div></div><div><h3>Conclusions/Discussion</h3><div>The ultra-low frequency active vibration isolation system designed in this paper achieves exceptionally low suspension stiffness. The implemented self-tuning feedforward controller isolates large precision machinery from broadband floor vibrations and significantly enhances the vibration isolation performance of the system.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118848"},"PeriodicalIF":4.3,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699115","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}

引用次数: 0

Vibration analysis of a coupled propulsion shaft-shell system based on the numerical and semi-analytical methods 基于数值和半分析方法的耦合推进轴壳系统振动分析

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-15 DOI: 10.1016/j.jsv.2024.118845

Jianyu Liu , Xinbin Li , Jing Liu , Yajun Xu , Guang Pan

{"title":"Vibration analysis of a coupled propulsion shaft-shell system based on the numerical and semi-analytical methods","authors":"Jianyu Liu , Xinbin Li , Jing Liu , Yajun Xu , Guang Pan","doi":"10.1016/j.jsv.2024.118845","DOIUrl":"10.1016/j.jsv.2024.118845","url":null,"abstract":"<div><div>The bidirectional coupling characteristics of vibrations for the propulsion shaft and the combined shell should be produced in the ocean conditions. Many previous studies always simplified the coupling relationship between the propulsion shaft and the combined shell, which neglected the deformation of the flexible shell or the time-varying stiffness of the support bearings. In this work, a comprehensive dynamic model of the flexible propulsion shaft-combined shell system is established, which considers the time-varying stiffness and contact forces of the bearings. A solution strategy approach combining the numerical and semi-analytical methods is adopted to improve the computational efficiency and reasonable accuracy of the previous methods. The dynamic responses of the system with the time-varying and time-in various bearing stiffness are compared to show the advantages of the proposed model. Note that the time-varying stiffness of the bearings can significantly affect the vibrations of the flexible coupled system. Moreover, the influences of the flexible shell thickness, eccentricity errors of the flexible shaft, and the bearing arrangements on the coupled system's vibrations are investigated. The findings can provide some references for the optimization methods of the vibration and noise reduction in underwater vehicles.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"599 ","pages":"Article 118845"},"PeriodicalIF":4.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720836","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}

引用次数: 0

Air ring bearings: Efficient modelling and case study for improved vibration behavior and enhanced rotor stability

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-15 DOI: 10.1016/j.jsv.2024.118806

Pascal Zeise, Bernhard Schweizer

{"title":"Air ring bearings: Efficient modelling and case study for improved vibration behavior and enhanced rotor stability","authors":"Pascal Zeise, Bernhard Schweizer","doi":"10.1016/j.jsv.2024.118806","DOIUrl":"10.1016/j.jsv.2024.118806","url":null,"abstract":"<div><div>A main drawback of rigid air bearings is that these bearings can usually not be run above the linear threshold speed of instability, since rotor amplitudes become too large. Providing, however, additional external damping, rotors with air bearings may also be operated above the linear threshold speed of instability – i.e. in the whirl/whip regime – with technically harmless amplitudes.</div><div>While the bearing bushing of conventional air bearings is usually rigidly fixed to the housing, the bushing of the special bearing considered here – subsequently called air ring bearing – is visco-elastically supported in the housing in order to provide external damping. Alternatively, the bearing sleeve can also be mounted using a foil structure so that external dissipation is mainly produced by dry friction.</div><div>Here, a systematic sensitivity study concerning the influence of different bearing parameters – particularly bearing clearances, ring supporting stiffness and damping/friction – on the stability of rotor systems with air ring bearings is presented. For the analysis, a transient nonlinear rotor/bearing model is used. It is shown that by an appropriate choice of the system parameters, the amplitudes in the whirl/whip region will remain moderate so that the rotor system may securely be operated above the linear stability limit.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"604 ","pages":"Article 118806"},"PeriodicalIF":4.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378515","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}

引用次数: 0

Steady-state dynamic characteristics analysis of a dual-unit collision and stick-slip vibration-driven system

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-15 DOI: 10.1016/j.jsv.2024.118814

Shaopei Wu , Tao Liu , Jiqi Wang , Guofang Li , Deyang Li , Wangcai Ding

{"title":"Steady-state dynamic characteristics analysis of a dual-unit collision and stick-slip vibration-driven system","authors":"Shaopei Wu , Tao Liu , Jiqi Wang , Guofang Li , Deyang Li , Wangcai Ding","doi":"10.1016/j.jsv.2024.118814","DOIUrl":"10.1016/j.jsv.2024.118814","url":null,"abstract":"<div><div>The physics model of isotropically connected and reversely connected dual-unit collision and stick-slip vibration-driven system (ICVDS,RCVDS) with a wide range of drive speed regulation and flexible direction switching is constructed; the differential equations of the system are established based on the system kinematic characteristics, the system kinematic calculation flow and Poincaré mapping are constructed, and the system cyclic kinematic state switching mechanism and the analysis of the cyclic kinematic type are analysed. The mechanism of state switching of the system and the analysis of the type of periodic motion are analysed. The experimental measurement and numerical simulation of the system were compared and analysed the change rule of the average driving speed of the system. The results show that the average driving speed of ICVDS and RCVDS has a symmetric distribution law. The use of excitation frequency as a regulation parameter has the advantages of wide speed regulation band and good continuity, and the use of phase difference regulation has the characteristics of symmetrical regulation. The results and methods of this research provide the corresponding theoretical basis for the design, parameter optimisation and control research of the multi-unit vibration-driven system.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"600 ","pages":"Article 118814"},"PeriodicalIF":4.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175466","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}

引用次数: 0

Natural mode splitting of a rotating disc in water at different wall distances as a model for high-head francis runners 水中旋转圆盘在不同壁距下的自然模态分裂作为高水头弗朗西斯流道的模型

IF 4.3 2区工程技术

Journal of Sound and Vibration Pub Date : 2024-11-13 DOI: 10.1016/j.jsv.2024.118824

Xiang Xia , Greco Moraga , Alexandre Presas , Zhengwei Wang , Lingjiu Zhou

{"title":"Natural mode splitting of a rotating disc in water at different wall distances as a model for high-head francis runners","authors":"Xiang Xia , Greco Moraga , Alexandre Presas , Zhengwei Wang , Lingjiu Zhou","doi":"10.1016/j.jsv.2024.118824","DOIUrl":"10.1016/j.jsv.2024.118824","url":null,"abstract":"<div><div>Francis turbines are essential equipments in the realm of sustainable energy production. However, their complex dynamics, particularly in the presence of fluid-structure interaction, pose significant challenges to optimising design and enhancing performance. This study focuses on the phenomenon of frequency splitting of a simplified rotating disc submerged in water, serving as a representative model for high-head Francis runners. The primary objective is to gain a deep understanding of how proximity to surrounding walls affects modal parameters of the rotating runner. This research employs both analytical and numerical methods. For cases characterised by significant asymmetry in wall distances on either side of the disc, we have refined the analytical model for frequency splitting based on the assumed mode method and potential flow theory. Additionally, we have developed a numerical model for predicting modal parameters of underwater rotating discs, building upon the imposed modal motion approach. These methods are validated using existing experimental results, demonstrating excellent consistency. The research indicates that for underwater rotating discs, frequency splitting occurs simultaneously with damping splitting. In general, as wall distances decrease, the degree of splitting increases, and the sensitivity of splitting to changes in wall distance also rises. This comprehensive study provides profound insights into the dynamic behavior of high-head Francis runners, highlighting the pivotal role played by wall proximity in shaping their vibrational behavior.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118824"},"PeriodicalIF":4.3,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142699117","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}

引用次数: 0