国际机械系统动力学学报(英文)最新文献

{"title":"Influence of multiple structural parameters on buffer performance of a thin-walled circular tube based on the coupling modeling technique","authors":"Kun Jiang,&nbsp;Xinggan Lu,&nbsp;Hao Wang","doi":"10.1002/msd2.12060","DOIUrl":"10.1002/msd2.12060","url":null,"abstract":"<p>Pyrotechnic devices are widely used in the aerospace and defense industries. However, these devices generate high-frequency and high-amplitude shock responses during their use, compromising safe operation of the system. In this paper, the application of a thin-walled circular tube as the energy absorber in pyrotechnic devices is investigated. To accurately predict the shock load and the buffer performance of the thin-walled circular tube, a coupled model connecting the energetic material combustion and finite element simulation is established. The validity of the coupled model is verified by comparing with experiments. Then, the collapse mechanism of the thin-walled circular tube is studied, and the influence of multiple structural parameters on its buffer performance is analyzed. The results show that the thin-walled circular tube effectively reduces the shock overload. The maximum shock overload reduced from 572 612<i>g</i> to 11 204<i>g</i> in the studied case. The structural parameters of the thin-walled circular tube mainly affect the deformation process and the maximum shock overload. The order of importance of structural parameters to the maximum shock overload is determined, among which the wall thickness has the most significant effect.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 4","pages":"374-390"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124731501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Generation mechanism and control of high-frequency vibration for tracked vehicles","authors":"Pingxin Wang,&nbsp;Xiaoting Rui,&nbsp;Feifei Liu,&nbsp;Guoping Wang,&nbsp;Hailong Yu,&nbsp;Bin He,&nbsp;Junjie Gu","doi":"10.1002/msd2.12059","DOIUrl":"https://doi.org/10.1002/msd2.12059","url":null,"abstract":"<p>A crawler system provides much larger ground contact, leading to excellent terrain adaptability. Due to its structural characteristics, high-frequency vibration proportional to the vehicle speed is generated during the driving process. This is a result of the polygon and rolling effects between the track and the wheels. A field test of a tracked vehicle is performed to monitor movement signals of the chassis and a rocker arm. Their corresponding power spectral density distributions confirm the correctness of the frequency-calculation equation. Then, a novel elastic track tensioning device with a damper is designed as a cushion between the idler and the chassis. Depending on its geometry, the equivalent damping coefficient for a dynamic model is evaluated. Subsequently, the damping is altered in response to different operating conditions by a hybrid damping fuzzy semiactive control system. The controller accounts for both chassis and track vibration. Based on the transfer matrix method for multibody systems, a dynamical model of the track system is developed. Control performances are evaluated using two numerical simulations of obstacle crossing and off-road driving operations. Results indicate that the proposed semiactive tensioner is substantially better than the conventional one. This paper provides a novel feasible scheme for vibration reduction of tracked vehicles.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"3 2","pages":"146-161"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12059","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50131411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and stability analysis of a high-speed train bearing system under variable speed conditions","authors":"Baosen Wang,&nbsp;Yongqiang Liu,&nbsp;Bin Zhang,&nbsp;Shaopu Yang","doi":"10.1002/msd2.12057","DOIUrl":"10.1002/msd2.12057","url":null,"abstract":"<p>During a high-speed train operation, the train speed changes frequently, resulting in motion change as a function of time. A dynamic model of a double-row tapered roller bearing system of a high-speed train under variable speed conditions is developed. The model takes into consideration the structural characteristics of one outer ring and two inner rings of the train bearing. The angle iteration method is used to determine the rotation angle of the roller within any time period, solving the difficult problem of determining the location of the roller. The outer ring and inner ring faults are captured by the model, and the model response is obtained under variable speed conditions. Experiments are carried out under two fault conditions to validate the model results. The simulation results are found to be in good agreement with the results of the formula, and the errors between the simulation results and the experimental results when the bearing has outer and inner ring faults are found to be, respectively, 5.97% and 2.59%, which demonstrates the effectiveness of the model. The influence of outer ring and inner ring faults on system stability is analyzed quantitatively using the Lempel–Ziv complexity. The results show that for low train acceleration, the inner ring fault has a more significant effect on the system stability, while for high acceleration, the outer ring fault has a more significant effect. However, when the train acceleration changes, the outer ring has a greater influence. In practice, train acceleration is usually small and does not frequently change in one operation cycle. Therefore, the inner ring fault of the bearing deserves more attention.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 4","pages":"352-362"},"PeriodicalIF":0.0,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12057","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124686999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of triboelectric nanogenerators: A review","authors":"Guoqiang Xu,&nbsp;Chuanyang Li,&nbsp;Chaojie Chen,&nbsp;Jingjing Fu,&nbsp;Tingting Hou,&nbsp;Yunlong Zi","doi":"10.1002/msd2.12058","DOIUrl":"10.1002/msd2.12058","url":null,"abstract":"<p>Triboelectric nanogenerators (TENGs) represent a promising next-generation renewable energy technology. TENGs have become increasingly popular for harvesting vibration energy in the environment due to their advantages of lightweight, broad range of material choices, low cost, and no pollution. However, issues such as input force irregularity, working bandwidth, efficiency calculation, and dynamic modeling hinder the use of TENGs in industrial or practical applications. In this paper, the modeling process of the dynamical system of a TENG is reviewed from the perspective of energy flow. In addition, this paper reviews the main contributions made in recent years to achieve optimized output based on springs, magnetic forces, and pendulums, and introduces different ways to increase the bandwidth of TENGs. Finally, the main problems of TENGs in the process of harvesting vibration energy are discussed. This review may serve as a practical reference for methods to convert irregular mechanical input sources into optimized output performance toward the commercialization of TENGs.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 4","pages":"311-324"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12058","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123665174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Full-field out-of-plane vibration displacement acquisition based on speckle-projection digital image correlation and its application in damage localization","authors":"Shancheng Cao,&nbsp;Jinwei Yan,&nbsp;Haibo Nian,&nbsp;Chao Xu","doi":"10.1002/msd2.12055","DOIUrl":"10.1002/msd2.12055","url":null,"abstract":"<p>Stereo-digital image correlation (Stereo-DIC) has been widely explored for modal analysis in plate-type structures due to its noncontact and full-field advantages. However, when the traditional stereo-DIC is adopted to capture the out-of-plane displacements, several challenging issues exist such as the development of surface speckles, asynchronous camera recording, and efficiency and accuracy degradation due to high computation costs. Moreover, with the captured out-of-plane displacements, effective and efficient evaluation of the high spatial resolution mode shapes and their application to damage localization are also critical problems. To tackle these issues, a speckle-projection DIC technique using a single high-speed camera is proposed to obtain the out-of-plane vibration displacements. Moreover, an enhanced peak-picking modal analysis method is adopted to enhance the estimation accuracy and efficiency of mode shapes. In addition, the low-rank property of mode shapes in an intact state and the spatial sparse property of damage locations are harnessed for the detection of damage positions without requiring reference data on the healthy state. Finally, the modal analysis and damage localization results based on the proposed speckle-projection DIC are compared with those of the traditional two-camera stereo-DIC technique to verify its feasibility and effectiveness. It is found that the differences in the identified resonant frequencies between these two methods are smaller than 1% for higher modes. Moreover, the proposed speckle-projection DIC has the same accuracy as the traditional two-camera stereo-DIC in terms of measurement accuracy, mode shape estimation, and damage localization.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 4","pages":"363-373"},"PeriodicalIF":0.0,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12055","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127242262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic mechanical behavior, microstructure evolution, and restoration mechanism of a β-Ti alloy during hot compression deformation","authors":"Xi Pan,&nbsp;Pei Li,&nbsp;Yang Chen,&nbsp;Zhixiang Qi,&nbsp;Hao Xu,&nbsp;Yuede Cao,&nbsp;Yuan Lei,&nbsp;Gong Zheng,&nbsp;Guang Chen","doi":"10.1002/msd2.12056","DOIUrl":"10.1002/msd2.12056","url":null,"abstract":"<p>Metastable β titanium alloys are promising materials for lightweight and energy-efficient applications due to their high strength and low density. Thermal–mechanical processing (TMP) is one of the most effective ways to improve the mechanical properties of such alloys. This paper describes a systematic TMP investigation on a new metastable β titanium alloy, including its dynamic mechanical behavior, and microstructure evolution, via isothermal compression tests and electron back-scattered diffraction characterizations. The results show that the compression stress increases with an increase in the strain rate and a decrease in the temperature. After yielding, the compression stress–strain pattern shows flow-softening behavior at a low temperature and a high strain rate, while sustaining a steady flow state at a high temperature and a low strain rate. The temperature-rise effect contributes to a large degree of flow softening at high strain rates. After the correction for temperature rise, the stress–strain constitutive relationships are established, showing that the compression behavior varies in different phase regions. Based on the microstructure characterizations, it is found that the dynamic recovery and dynamic recrystallization dominate the hot deformations in β phase region and at low strain rates, while the deformation band as an additional product is found in α + β phase region and at high strain rates. The results contribute to a better understanding of the TMP for the considered alloy and may also represent a useful database for β-Ti alloy applications in lightweight mechanical systems.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 4","pages":"325-338"},"PeriodicalIF":0.0,"publicationDate":"2022-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12056","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115463133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hybrid multibody system method for the dynamic analysis of an ultra-precision fly-cutting machine tool","authors":"Hanjing Lu,&nbsp;Xiaoting Rui,&nbsp;Ziyao Ma,&nbsp;Yuanyuan Ding,&nbsp;Yiheng Chen,&nbsp;Yu Chang,&nbsp;Xuping Zhang","doi":"10.1002/msd2.12051","DOIUrl":"10.1002/msd2.12051","url":null,"abstract":"<p>The dynamics of an ultra-precision machine tool determines the precision of the machined surface. This study aims to propose an effective method to model and analyze the dynamics of an ultra-precision fly-cutting machine tool. First, the dynamic model of the machine tool considering the deformations of the cutter head and the lathe head is developed. Then, the mechanical elements are classified into M subsystems and F subsystems according to their properties and connections. The M-subsystem equations are formulated using the transfer matrix method for multibody systems (MSTMM), and the F-subsystem equations are analyzed using the finite element method and the Craig–Bampton reduction method. Furthermore, all the subsystems are assembled by combining the restriction equations at connection points among the subsystems to obtain the overall transfer equation of the machine tool system. Finally, the vibration characteristics of the machine tool are evaluated numerically and are validated experimentally. The proposed modeling and analysis method preserves the advantages of the MSTMM, such as high computational efficiency, low computational load, systematic reduction of the overall transfer equation, and generalization of its computational capability to general flexible-body elements. In addition, this study provides theoretical insights and guidance for the design of ultra-precision machine tools.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 3","pages":"290-307"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134185292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grating-like anechoic layer for broadband underwater sound absorption","authors":"Chenlei Yu,&nbsp;Mingyu Duan,&nbsp;Wei He,&nbsp;Xin Chen,&nbsp;Fengxian Xin,&nbsp;Tian J. Lu","doi":"10.1002/msd2.12053","DOIUrl":"10.1002/msd2.12053","url":null,"abstract":"<p>To address the challenging task of effective sound absorption in the low and broad frequency band for underwater structures, we propose a novel grating-like anechoic layer by filling rubber blocks and an air backing layer into metallic grating. The metallic gratings are incorporated into the anechoic layer as a skeleton for enhanced viscoelastic dissipation by promoting shear deformation between rubber and metal plates. The introduction of an air backing layer releases the bottom constraint of the rubber, thus intensifying its deformation under acoustic excitation. Based on the homogenization method and the transfer matrix method, a theoretical model is developed to evaluate the sound absorption performance of the proposed anechoic layer, which is validated against finite element simulation results. It is demonstrated that a sound absorption coefficient of the grating-like anechoic layer of 0.8 can be achieved in the frequency range of 1294–10 000 Hz. Given the importance of sound absorption at varying frequencies, the weighted average method is subsequently used to comprehensively evaluate the performance of the anechoic layer. Then, with structural density taken into consideration, an integrated index is proposed to further evaluate the acoustic properties of the proposed anechoic layer. Finally, the backing conditions and the boundary conditions of finite-size structures are discussed. The results provide helpful theoretical guidance for designing novel acoustic metamaterials with broadband low-frequency underwater sound absorption.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 3","pages":"265-277"},"PeriodicalIF":0.0,"publicationDate":"2022-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116717022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The first International Conference on Mechanical System Dynamics grandly convened in Nanjing, China","authors":"Tong Zhang,&nbsp;Qinbo Zhou,&nbsp;Yanni Zhang","doi":"10.1002/msd2.12054","DOIUrl":"10.1002/msd2.12054","url":null,"abstract":"&lt;p&gt;The first International Conference on Mechanical System Dynamics (ICMSD), a major international conference in the field of mechanical system dynamics, was held as a hybrid in-person/virtual conference during the period August 24–27, 2022, in Nanjing, China, an ancient major cultural city. More than 2000 scientists and engineering experts from more than 20 countries in Asia, Europe, America, Africa, and Oceania, including 29 members of the National Academy of Sciences/Engineering, 13 presidents of international academic societies, and 15 Editors-in-Chief of international journals, attended the conference, as shown in Figures 1 and 2. Focusing on the theme of “Promoting Science, Technology and Industry by Mechanical System Dynamics,” the conference defines a new chapter in the development of the field of mechanical system dynamics.&lt;/p&gt;&lt;p&gt;The standing ICMSD is jointly initiated and organized by well-recognized researchers from more than 20 leading universities in more than 10 countries, including the Nanjing University of Science and Technology, Aarhus University, Beijing Institute of Technology, Harbin Institute of Technology, LUT University, McGill University, Nanjing University of Aeronautics and Astronautics, Nanyang Technological University, Northwestern Polytechnical University, Peking University, Politecnico di Milano, Shijiazhuang Tiedao University, Swansea University, the Hong Kong University of Science and Technology, the State University of New York, Korea (SUNY Korea), Tsinghua University, University of Aberdeen, University of Siegen, University of Wollongong, and Wuhan University. The conference is held every 2 years in different countries in rotation. The Standing Steering Committee (see Appendix A) of ICMSD now consists of 35 international experts, including 15 members of the National Academy of Sciences/Engineering, 14 presidents of international academic societies, and 14 Editors-in-Chief of international journals. They oversee the ICMSD planning and development. Prof. Xiaoting Rui from the Nanjing University of Science and Technology, a member of the Chinese Academy of Sciences, is the ICMSD Chairman. Profs. Marco Amabili from McGill University, a fellow of the Canadian Academy of Engineering; Seung-Bok Choi from the State University of New York, Korea, a fellow of the Korea Science and Technology Academy; Yonggang Huang from Northwestern University, a member of the National Academy of Engineering/Sciences, USA; Aki Mikkola from the LUT University, the Chair of the International Federation for the Promotion of Mechanism and Machine Science, IFToMM Finland; Tianshou Zhao from the Hong Kong University of Science and Technology, a member of Chinese Academy of Sciences, are the ICMSD Vice Chairmen. The first ICMSD was hosted by the Nanjing University of Science and Technology, the Chinese Society of Theoretical and Applied Mechanics, the International Association of Applied Mechanics, the John Wiley &amp; Sons Inc., and the &lt;i&gt;Inter","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 3","pages":"233-248"},"PeriodicalIF":0.0,"publicationDate":"2022-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127503761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nominal geometry and force measures for solids and fluids","authors":"Ahmed A. Shabana","doi":"10.1002/msd2.12052","DOIUrl":"10.1002/msd2.12052","url":null,"abstract":"<p>Understanding solid- and fluid-inertia forces and their coupling with the gravity potential in complex motion scenarios is necessary for evaluating system stability and identifying root causes of system failure and accidents. Because solids and fluids have an infinite number of degrees of freedom and distributed inertia and elasticity, having meaningful qualitative and quantitative nominal measures of the kinematics and forces will contribute to a better understanding of the system dynamics. This paper proposes developing new continuum-based <i>nominal measures</i> for the characterization of the oscillations and forces. By using a material-point approach, these new nominal measures, which have their roots in the continuum-mechanics partial-differential equations of equilibrium and <i>Frenet geometry</i>, are independent of the formulation or generalized coordinates used to develop the dynamic equations of motion. The paper proposes a <i>data-driven-science</i> approach to define a nominal continuum space-curve geometry with nominal curvature and torsion; a nominal <i>instantaneous motion plane</i> (IMP), which contains the resultant of all forces including the inertia forces; and a nominal <i>instantaneous zero-force axis</i> (IZFA) along which the resultant of all forces vanishes. While using the material-point approach eliminates the need for introducing moment equations associated with orientation coordinates, the IMP and IZFA concepts can be used to define the instantaneous axis of significant moment components, which can lead to accidents such as in the case of vehicle rollovers.</p>","PeriodicalId":60486,"journal":{"name":"国际机械系统动力学学报(英文)","volume":"2 3","pages":"249-252"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/msd2.12052","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123068201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}