Journal of Sound and Vibration最新文献

{"title":"Investigation of non-linear dynamic characteristics of a point-contact spiroid worm drive generated by two-generating-surface method","authors":"Zhaokuan Xu ,&nbsp;Haitao Li ,&nbsp;Wen Ren ,&nbsp;Ming Ma","doi":"10.1016/j.jsv.2024.118805","DOIUrl":"10.1016/j.jsv.2024.118805","url":null,"abstract":"<div><div>Because of instantaneous multi-tooth contact and line-contact, an Archimedean spiroid worm drive is sensitive to manufacturing and assembly errors. To solve the sensitivity of the spiroid worm drive (SWD), this paper proposes a kind of two-generating-surface method (TGSM) that transforms the contact type of the SWD from line-contact to point-contact. A generating surface is the helical surface of Archimedean spiroid worm, which generates the surface of a spiroid worm wheel. The other one is the arc-curve of a turning tool which degenerates from a spatial arc-surface and the arc-curve forms the surface of the worm that is called arc-worm. The arc-worm and the worm wheel compose a kind of point-contact spiroid worm drive (PCSWD). Furthermore, in order to investigate the non-linear dynamic characteristics of the PCSWD, a 14-degree-of-freedom multi-body dynamic model of the PCSWD considering bending, torsion, and axial is established. For case study, numerical simulation is performed to illustrate the meshing characteristic through tooth contact analysis. A prototype is manufactured and meshing test is performed to verify the correctness of the method. Subsequently, the dynamic response of the PCSWD is analysed by solving dynamic differential equations, The nonlinear characteristics of dynamic transmission error (DTE) under different torques, meshing damping ratio coefficients, and backlashes are analyzed by bifurcation diagrams. The dynamic response of DTE under different excitation frequencies is discussed using time-domain plot, phase portrait, Poincaré map, and frequency domain diagram under constant torque, meshing damping ratio coefficient, and backlash. Finally, the influences of different meshing models, backlashes, helix angles, and tooth profile angles on the root mean square value of dynamic meshing force (DMF) under light and heavy load conditions are discussed. The DTE results show that the PCSWD has sophisticated nonlinear characteristics under different conditions. The DMF results of the PCSWD show that impact and noise problems are more likely to occur under light load. The research provides meaningful theoretical guidance for the design and optimization of high-performance, low-noise PCSWD.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118805"},"PeriodicalIF":4.3,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142650772","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":"Response to “Discussion of S. Ponsioen, S. Jain and G. Haller: ‘Model reduction to spectral submanifolds and forced-response calculation in high-dimensional mechanical systems’, Journal of Sound and Vibration 488, 2020, pages 1-23”","authors":"Sten Ponsioen ,&nbsp;Shobhit Jain ,&nbsp;George Haller","doi":"10.1016/j.jsv.2024.118791","DOIUrl":"10.1016/j.jsv.2024.118791","url":null,"abstract":"<div><div>We have reproduced our disputed simulation results from our original article as well as the simulations of the discussion article of Krack and Gross referenced above in the title. We have found several inaccuracies and omissions in the discussion article that invalidate its authors’ main claims. We also briefly address inherent performance differences between the SSMTool and the NLvib algorithms to the benefit of the former.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118791"},"PeriodicalIF":4.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142707361","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":"Significance analysis of the attenuation coefficient of vibrations in a boron nitride–carbon nanotube under buckling and fracture: A molecular dynamics study","authors":"Likui Yang ,&nbsp;Keke Bai ,&nbsp;Aihua Wei","doi":"10.1016/j.jsv.2024.118809","DOIUrl":"10.1016/j.jsv.2024.118809","url":null,"abstract":"<div><div>Boron nitride–carbon nanotubes (BN–CNTs), serving as nanomass sensors, exhibit fatigue characteristics, such as buckling or bond breakage, under impact from measured particles. However, the impact of such damage on the functionality of BN–CNTs remains unclear. Here, we use molecular dynamics simulations to investigate the performance of BN–CNTs mass sensors under impact by C60 particles, focusing on three critical states: buckling, bond breakage, and coexisting buckling and bond breakage. An analysis of the impact stress and mass responsivity shows that damaged beams have a lower mass detection capability than undamaged beams. The results of a paired <em>t</em>-test and an analysis of the decay coefficients and vibration frequencies of damaged nanobeams show that damaged nanobeams have a significantly lower quality factor than undamaged nanobeams. We use an energy equation to analyze the impact process of nanobeams for the first time, revealing that the change in the potential energy of the beam is a crucial influence factor of the beam critical state. This study provides insights into the damage to nanoscale mass sensors caused by impact.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118809"},"PeriodicalIF":4.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654945","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":"Multi-modal vibration control method combining modal decoupling and active disturbance rejection for wind tunnel models","authors":"Mengde Zhou,&nbsp;Xinyu Zhang,&nbsp;Yuhang Ren,&nbsp;Qi Zhao,&nbsp;Binkai Zhu,&nbsp;Wei Wu,&nbsp;Wei Liu","doi":"10.1016/j.jsv.2024.118810","DOIUrl":"10.1016/j.jsv.2024.118810","url":null,"abstract":"<div><div>When excited by broadband wind load, the wind tunnel model support system with low stiffness and damping is easy to produce multi-modal coupling vibration. It not only leads to inaccurate experimental data but also has potential safety hazards. Therefore, to ensure the reliable development of wind tunnel tests, a multi-modal vibration control method with multi-damping is proposed. Firstly, a multi-damping vibration suppression structure is designed based on the vibration analysis results. Next, the modal filter is designed by identifying the modal decoupling matrix, which can get the independent feedback signals of each mode. Then, considering the external disturbance of the environment and the internal disturbance between dampers, a multi-modal linear active disturbance rejection controller is designed to control the vibration and total disturbance. Finally, the multi-modal vibration suppression system of the UAV model is built, and the sweep frequency identification and hammering experiment are carried out. The results show that the proposed method can reduce the power spectral density of the first and second modes by 42.500 dB/Hz and 12.442 dB/Hz respectively, and increase the damping ratio by 14.659 times and 2.898 times respectively. Compared with the traditional control methods, the proposed method possesses obvious advantages in multi-modal vibration control. Therefore, ensured that wind tunnel tests were conducted smoothly.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"597 ","pages":"Article 118810"},"PeriodicalIF":4.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654944","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":"Influence of bolt preload degradation on nonlinear vibration responses of jointed structures","authors":"Di Yuan,&nbsp;Qiang Wan,&nbsp;Dong Wang","doi":"10.1016/j.jsv.2024.118797","DOIUrl":"10.1016/j.jsv.2024.118797","url":null,"abstract":"<div><div>The clamping performance of bolted joints was gradually degrading under long-term vibration loads, which induced a great impact on the stick–slip friction contact behavior of bolted joint interfaces. In this paper, a time-varying Iwan model was developed to reproduce the tangential hysteresis behavior of bolted joint interfaces by considering preload degradation. A three-degree-of-freedom mass–spring-damper oscillator was numerically simulated to investigate the influence of preload degradation on nonlinear vibration responses, as well as the experimental investigations of a bolted joint structure. The comparison results showed that the proposed model could well describe the effects of preload degradation on the stick–slip friction contact behavior of bolted joint interfaces. The numerical results revealed the nonlinear effects of preload degradation on the frequency response functions (FRFs), which demonstrated good agreement with experimental results.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"595 ","pages":"Article 118797"},"PeriodicalIF":4.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593821","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 magneto-mechanical metamaterial with the wave transmission and Poisson’s ratio controlled via the magnetic field","authors":"K.K. Dudek ,&nbsp;J.A. Iglesias Martínez ,&nbsp;L. Hirsinger ,&nbsp;M. Kadic ,&nbsp;M. Devel","doi":"10.1016/j.jsv.2024.118784","DOIUrl":"10.1016/j.jsv.2024.118784","url":null,"abstract":"<div><div>In recent years, there has been a notable increase in the significance of active mechanical metamaterials capable of being remotely manipulated through changes in external stimuli. While research in this area has achieved considerable success in controlling reconfiguration to induce shape morphing or alter static mechanical properties, the active control of wave propagation within these systems remains largely unexplored. In this study, we propose a magneto-mechanical metamaterial that can be entirely governed by adjusting the magnitude and direction of an external magnetic field. We demonstrate that such a system offers remote control over its Poisson’s ratio, allowing for transitions from strongly auxetic to positive Poisson’s ratio configurations. Additionally, our system enables manipulation of the phononic band structure, facilitating the formation of complete band gaps across different frequency ranges depending on the stage of the magnetically guided reconfiguration process. The potential for achieving such active control over the properties and behavior of these materials holds great promise for various applications, including robotics and smart vibration dampers that can be remotely controlled.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"595 ","pages":"Article 118784"},"PeriodicalIF":4.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142551886","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":"Acoustic flow resonances in installed rectangular jets","authors":"V.А. Shorstov ,&nbsp;S.А. Каrabasov ,&nbsp;V.Е. Маkarov ,&nbsp;А.К. Мironov ,&nbsp;V. Gryazev","doi":"10.1016/j.jsv.2024.118786","DOIUrl":"10.1016/j.jsv.2024.118786","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Zonal Large Eddy Simulations (LES) of complex installed rectangular jet flows are performed for subsonic jet conditions of the Central Institute for Aviation Motors (CIAM) experiment, where a strong tone was reported. For far-field noise modelling, the zonal LES solutions are coupled with the permeable formulation of the Ffowcs Williams and Hawkings (FW-H) method. The obtained noise spectra predictions are compared with the acoustic measurements in the CIAM facility. To reduce statistical noise of the relatively short LES time series, contributions due to several dominant low frequency tones and the remaining broadband signal are computed separately, using a tailored Fourier transform technique for each signal type. For cross-validation, noise spectra measurements of an equivalent isolated round jet in the CIAM facility are compared with the empirical sJet model calibrated on the NASA Small Hot Jet Acoustic Rig (SHJAR) jet noise database. While the two datasets agree reasonably well for mid to high frequencies, larger discrepancies are observed for low frequencies, which are attributed to acoustic reflections in the non-anechoic CIAM facility. The differences in noise levels between the CIAM dataset and the sJet model representing the NASA jet noise data are used to determine the experimental uncertainty of the CIAM noise measurements for each frequency and observer angle. For the installed rectangular jet, it is shown that far-field noise spectra predictions of the zonal LES-FW-H method for both the fundamental tone, its sixth harmonic corresponding to the jet Strouhal number of around 1, and the broadband component are broadly within the experimental error bar for most observer angles. Some discrepancies between predictions of the zonal LES method and the CIAM measurements for the main low frequency tone for the 30° and 90°, where the experimental uncertainty at low frequencies is largest are also noted. After validating the acoustic solutions, spectral and conditional averaging analysis methods are applied to elucidate mechanisms of the acoustic-flow resonance in the installed rectangular jet flow. The numerical dispersion relation is obtained to analyse phase velocities of the upstream and downstream travelling pressure waves in the stream-wise direction. The conditional analysis of pressure fluctuations inside the jet reveals the emergence of internal reflection points corresponding to a rapid change of the acoustic wave phase as well as the saddle points interpreted as localised zones of vorticity shed from the side-wall edges. To independently investigate the effect of trailing edges and corner points of the jet embodiment geometry on closing the acoustic-flow resonance cycle, several modifications of the baseline rectangular nozzle are considered, such as introducing chevron-like lobes and cuts on the trailing edges of the side walls as well as smoothing the sharp corner points of the wall edges. Following the series of addition","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"596 ","pages":"Article 118786"},"PeriodicalIF":4.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142577933","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":"Influence of bolt creep induced pre-tightening force relaxation on dynamic response of the bolted joint system","authors":"Kai Jiang ,&nbsp;Zhifeng Liu ,&nbsp;Tao Zhang ,&nbsp;Feng Wang","doi":"10.1016/j.jsv.2024.118800","DOIUrl":"10.1016/j.jsv.2024.118800","url":null,"abstract":"<div><div>The bolted joint is an important link that affects the accuracy maintenance of the heavy-duty machine tool. Due to bolts of the crossbeam are under a preload of several hundred kN for an extended period, the bolt gradually creeps and elongates as the machine tool's service time increases. This relaxation of the preload results in a degradation of the bolted stiffness, weakening the dynamic response of the bolted joint system. To reveal that the degradation law of crossbeam bolting performance of the heavy-duty machine tool induced by bolt creep, based on the Norton-Bailey(NB) model, a method for analyzing the creep of bolts with precision threads is proposed, and the influence of thread geometry and friction coefficient on the creep stress relaxation of bolts is studied. Considering the interface contact, an interface contact stiffness model is derived based on fractal theory. The dynamic equation of the bolted beam system is established using the Matrix27 stiffness matrix. The dynamic response of the bolted system, resulting from the degradation of interface stiffness due to bolt creep, is analyzed. The results show that the stress relaxation of bolt creep is not only related to creep parameters, but also related to the mate-thread interaction. The dynamic model with Matrix27 stiffness matrix is comparable to experiment in calculation accuracy and efficiency, which provides technical guidance for machine tool dynamics analysis and effectively solves the scientific problem of beam bolting performance degradation during the service of heavy-duty machine tools.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"596 ","pages":"Article 118800"},"PeriodicalIF":4.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592777","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":"Integrated analysis of additive and multiplicative internal excitation parameters in misaligned-bowed-internally damped rotor systems with active magnetic bearings: Numerical and experimental identification","authors":"Atul Kumar Gautam,&nbsp;Rajiv Tiwari","doi":"10.1016/j.jsv.2024.118794","DOIUrl":"10.1016/j.jsv.2024.118794","url":null,"abstract":"<div><div>Precisely identifying internal excitation parameters within rotor-bearing systems is imperative for ensuring reliability and optimal performance. This paper meticulously addresses various issues, such as coupling misalignment, residual bow, internal damping, and imbalance. However, the novelty of the work lies in its detailed exploration of the interplay between these parameters, particularly emphasizing the multiplicative effect resulting from residual bow and misalignment. Introducing an innovative approach, the paper employs an active magnetic bearing (AMB) near the output rotor's disc to mitigate vibrations and enhance system stability. A robust identification algorithm is developed, leveraging least-squares fitting in the frequency domain to accurately estimate multiple internal excitation parameters and system characteristics. These parameters encompass viscous damping, internal damping, unbalance, residual bow, static and dynamic coupling misalignment, multiplicative force, and various AMB constants. The algorithm's resilience is demonstrated through rigorous testing against noise percentage errors. Furthermore, practical experimentation using a laboratory test rig validates its efficacy. Response data from proximity probes are inputted into the algorithm, successfully identifying parameters. Experimental validation is achieved by comparing irregularities in orbit plots and full spectra with numerical simulations based on the identified parameters, affirming the algorithm's reliability in real-world scenarios. This comprehensive approach offers a dependable solution for internal excitation identification in complex rotor systems.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"595 ","pages":"Article 118794"},"PeriodicalIF":4.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651485","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":"Topological interface and corner states of flexural waves in metamaterial plates with glide-symmetric holes","authors":"Lei Fan ,&nbsp;Yafeng Chen ,&nbsp;Jie Zhu ,&nbsp;Zhongqing Su","doi":"10.1016/j.jsv.2024.118795","DOIUrl":"10.1016/j.jsv.2024.118795","url":null,"abstract":"<div><div>This study investigates the topological localization and propagation of flexural waves in metamaterial plates with perforated holes exhibiting glide symmetry. The dispersion relations of flexural waves in this mechanical system exhibit four-fold Dirac degeneracies at the M point of the Brillouin zone. By properly adjusting the rotation angles of the perforated holes, these degeneracies can be lifted up to create omnidirectional bandgaps, enabling nontrivial topological phases. Both numerical and experimental results demonstrate multiple topological states of flexural waves in the developed elastic metaplates, including dual-band helical interface states and anisotropic interface/corner states. The simple perforated metaplates with glide-symmetric holes provide novel, manufacturable platforms for the flexible manipulation of topological flexural waves, greatly facilitating potential applications such as energy harvesting and signal enhancement.</div></div>","PeriodicalId":17233,"journal":{"name":"Journal of Sound and Vibration","volume":"595 ","pages":"Article 118795"},"PeriodicalIF":4.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571593","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}