检索结果-内蒙古大学图书馆

1st International Conference on mechanical system Dynamics, ICMSD 2022

作者： Li, Cuixing Liu, Yongqiang State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang China School of Traffic and Transportation Shijiazhuang Tiedao University Shijiazhuang China

ISBN: (数字)9781839537837

ISBN: (纸本)9781839537837

Parameter-adaptive VMD method is often used in rolling bearing fault diagnosis. The two key parameters K and D of VMD can be determined adaptively by using an intelligent optimization algorithm. The working environment of wheelset bearing is complex, and the existing parameter-adaptive VMD method is difficult to accurately extract the fault information of wheelset bearing. To solve this problem, a parameter-adaptive VMD method guided by the envelope power spectrum correlated kurtosis is proposed. Correlated kurtosis has strong directivity and is not affected by impact noise and cyclic stationary noise. Meanwhile, at low SNR, the frequency domain correlated kurtosis is more stable than the time-domain correlated kurtosis. Therefore, taking the local maximum envelope power spectrum correlated kurtosis as the objective function, and using the global searching ability of PSO, the optimal parameter combination of VMD can be adaptively determined. VMD is used to analyze the signal, calculate the envelope power spectrum correlated kurtosis of each component, and select the largest one for envelope spectrum analysis. Through simulation and experimental analysis, it is verified that this method can accurately extract the fault characteristics of wheelset bearing under complex interference. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Failure analysis

来源：评论

学校读者我要写书评

暂无评论

RESEARCH ON WHEEL WEAR SIMULATION AND WHEEL-RAIL CONTACT RELATIONSHIP OF HEAVY-HAUL FREIGHT WAGON

International Journal of Mechatronics and Applied Mechanics

引用

International Journal of Mechatronics and Applied Mechanics 2024年第18期2024卷 33-43页

作者： Kai, Hao Wenkai, Yang Donghui, Zhang Xinyan, Pei Chen, Wang Yuexiang, Xi School of Mechanical Enguneering Hebei University of Architecture Zhangjiakou075000 China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang050043 China

In order to study the evolution law of wheel profile wear of heavy-haul freight wagon and the influence of worn wheel profile on wheel-rail contact relationship, taking C80 heavy-haul freight wagon as the research object, the dynamic model of heavy-haul freight wagon and the prediction model of wheel wear were established by UM multi-body dynamics software. Based on vehicle-track coupling dynamics theory, Kik-Piotrowski wheel-rail contact algorithm and Archard wheel wear prediction model, wheel wear simulation research was carried out. Firstly, the correctness of the wheel wear method is verified by measuring the maximum wheel wear, and the wheel wear profile under different mileages is further predicted, and the wear under the wear profile and the variation law of wheel-rail contact parameters are analyzed. The results show that with the increase of running mileage, the wheel wear width increases, and the tread wear width of 1st wheelset is wider than that of 2nd wheelset, and it is close to the root of the wheel. At 70,000 km, the wear width of the 1st wheelset is [− 40 ~ 40 mm], while the 2nd wheelset is [− 40 ~ 36 mm], and the 1st wheelset has serious flange wear, and the flange wear rate of the 1st wheelset is 0.178 mm / 10,000 km higher than that of the 2nd wheelset, and is 2.39 times that of the 2nd wheelset. When the wheel runs up to 50,000 km, the wheel-rail contact point will jump. It is suggested that the wheel flange or rail side should be lubricated when the vehicle runs for 40,000 km in the early stage, and the wheel should be repaired when it runs for 50,000 km in the later stage. © 2024, Cefin Publishing House. All rights reserved.

关键词： Vehicle wheels

来源：评论

学校读者我要写书评

暂无评论

The Scheme to Determine the Convergence Term of the Galerkin Method for Dynamic Analysis of Sandwich Plates on Nonlinear Foundations

引用

Acta Mechanica Solida Sinica 2021年第1期34卷 1-11页

作者： Hong-Yan Chen Hu Ding Shao-Hua Li Li-Qun Chen Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematicsand MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversitygShanghai 200444China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversitxyShiyiazhuang 050043China

The vibration of a plate resting on elastic foundations under a moving load is of great significance in the design of many engineering fields,such as the vehicle-pavement system and the aircraft-runway *** or runways are always laminated *** Galerkin truncation method is widely used in the research of *** number of truncation terms directly affects the convergence and accuracy of the response ***,the selection of the number of truncation terms has not been clearly stated.A nonlinear viscoelastic foundation model under a moving load is *** on the natural frequency of linear undisturbed derivative systems,the truncation terms are used to determine the convergence of vibration *** criterion for the convergence of the Galerkin truncation term is *** scheme is related to the natural frequency with high efficiency and *** the dynamic response of the sandwich beam under a moving load,the feasibility of the scheme is *** effects of different system parameters on the scheme and the truncation convergence of dynamic response are *** research in this paper can be used as a reference for the study of the vibration of elastic foundation ***,the model established and the truncation analysis method proposed are helpful for studying the vibration of vehicle-pavement system and related systems.

关键词： ndwich plate Galerkin method Convergence Nonlinear foundation

来源：评论

学校读者我要写书评

暂无评论

Energy harvesting and speed sensing with a hybrid rotary generator for self-powered wireless monitoring

引用

Acta Mechanica Sinica 2024年第9期40卷 116-130页

作者： Zhixia Wang Hongyun Qiu Xuanbo Jiao Wei Wang Qichang Zhang Ruilan Tian Dongxing Cao School of Mechanical Engineering Tianjin UniversityTianjin 300350China Tianjin Key Laboratory of Nonlinear Dynamics and Control Tianjin 300350China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China Department of Mechanics Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China

Real-time onboard health monitoring systems are critical for the railway industry to maintain high service quality and operational ***,the issue with power supplies for monitoring sensors persists,especially for freight trains that lack onboard ***,we propose a hybrid piezoelectric-triboelectric rotary generator(HPT-RG)for energy harvesting and vehicle speed *** HPT-RG incorporates a rotational self-adaptive technique that softens the equivalent stiffness,enabling the piezoelectric non-resonant beam to surpass resonance limitations in a low-frequency *** experiments demonstrate the feasibility of using the HPT-RG as an energy harvesting module to collect the rotational energy of the freight rail transport and power the wireless temperature *** allow multiple monitoring in confined spaces on trains,a triboelectric sensing module is added to the HPT-RG to sense the operation speed and mileage of ***,the generator exhibits favorable mechanical durability under more than 600 h of official testing on the train bogie *** proposed HPT-RG is essential for creating a truly self-powered,maintenance-free,and zero-carbon onboard wireless monitoring system on freight railways.

关键词： Energy harvesting Speed sensing Rotational self-adaptive technique Low-frequency Self-powered wireless monitoring

来源：评论

学校读者我要写书评

暂无评论

Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier

引用

Applied Mathematics and Mechanics(English Edition) 2021年第6期42卷 755-770页

作者： Xiangjian DUAN Dongxing CAO Xiaoguang LP Yongjun SHEN Beijing Institute of Structure and Environment Engineering Beijing 100076China Faculty of Materials and Manufacturing Bejing University of TechnologyBeijing 100124China Beijing Key Laboratory of Nonlinear V ibrations and Strength of Mechanical Structures Beijing 100124China State Key Laboratory of Mechanical Behavior and System Safety of Trafic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China

Vibration energy harvesters(VEHs) can transform ambient vibration energy to electricity and have been widely investigated as promising self-powered devices for wireless sensor networks, wearable sensors, and applications of a micro-electro-mechanical system(MEMS). However, the ambient vibration is always too weak to hinder the high energy conversion efficiency. In this paper, the integrated frame composed of piezoelectric beams and mechanical amplifiers is proposed to improve the energy conversion efficiency of a VEH. First, the initial structures of a piezoelectric frame(PF) and an amplification frame(AF) are designed. The dynamic model is then established to analyze the influence of key structural parameters on the mechanical amplification factor. Finite element simulation is conducted to study the energy harvesting performance, where the stiffness characteristics and power output in the cases of series and parallel load resistance are discussed in detail. Furthermore, piezoelectric beams with variable cross-sections are introduced to optimize and improve the energy harvesting efficiency. Advantages of the PF with the AF are illustrated by comparison with conventional piezoelectric cantilever beams. The results show that the proposed integrated VEH has a good mechanical amplification capability and is more suitable for low-frequency vibration conditions.

关键词： vibration energy harvesting mechanical amplifier piezoelectric frame(PF) amplification frame(AF) variable cross-section beam

来源：评论

学校读者我要写书评

暂无评论

Determination of safety Rock Pillar Thickness in Karst Tunnel Based on Tunnel Face Displacement Mutation Criterion 11th

Determination of Safety Rock Pillar Thickness in Karst Tunne...

引用

11th International Conference on Civil engineering, ICCE 2024

作者： Lang, Zhijun Ma, Zecheng Li, Mangyuan Qiao, Haiyang China Construction Seventh Engineering Division Corp. Ltd. Zhengzhou450016 China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang050043 China School of Civil Engineering Shijiazhuang Tiedao University Shijiazhuang050043 China

ISBN: (纸本)9783031879586

During the excavation of water-rich cave tunnels, it remains crucial to establish the safe rock pillar thickness at the excavation face to define the required reinforcement measures and guarantee operational security throughout engineering processes. Many factors, including geological conditions, the extent of karst development, and the water pressure within the karst cavity, influence the thickness of the safety rock pillar in a karst tunnel. Utilizing the displacement mutation criterion of the tunnel face, the safe rock pillar thickness for the karst tunnel is quantified through finite element modeling. The methodology commences with a test of the tunnel rock's geomechanical behavior, followed by parameter calibration for the tunnel's geological envelope. Based on the experimental correction parameters, the numerical simulation of the longitudinal deformation characteristics at the karst tunnel face is carried out, ultimately identifying the critical proximity range between solution cavities and working faces that triggers interfacial displacement instabilities. The thickness of the safe rock pillar is computationally determined through displacement mutation criterion at the tunnel face, with systematic investigation revealing the thickness of the safe rock pillar and its variation law across varying geostatic stresses and hydrostatic conditions. The results show that: (1) As submersion duration increases, the surrounding rock's cohesion and internal friction angle typically demonstrate a declining trend, resulting in reduced shear strength of the rock mass. (2) Under deeply buried conditions, the precision of the stratum structure method and its convergence limitations lead to reduced accuracy in determining safe rock pillar thickness when abrupt displacement occurs at the tunnel face, particularly when the karst cavity is positioned 1 m to 4 m from the tunnel face. (3) Integrating numerical modeling with displacement anomaly criteria enhances the accuracy of saf

关键词： Convergence of numerical methods

来源：评论

学校读者我要写书评

暂无评论

Analysis of Factors Affecting Vibration Response of Axle Box Bearing of High-Speed Trains

引用

Journal of Vibration engineering and Technologies 2025年第5期13卷 1-23页

作者： Wang, Min Yang, Shaopu Liu, Yongqiang Chen, Yanhong Zhang, Kai State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang 050043 China School of Traffic and Transportation Shijiazhuang Tiedao University Shijiazhuang 050043 China School of Mechanical Engineering Shijiazhuang Tiedao University Shijiazhuang 050043 China CRRC TANGSHAN CO. LTD Tangshan 063000 China China Water Resources Beifang Investigation Design and Research Co. Ltd. Tianjin 300222 China

During the operation of high-speed trains, the vibration characteristics of axle box bearings are influenced by multiple factors. Specifically, this paper investigates the effects of track irregularity excitation, thermal deformation, and lubrication conditions on bearing vibration response under identical working conditions. To achieve this, based on Hertzian contact theory and elastohydrodynamic lubrication principles, a dynamic model of axle box bearing for high-speed train is established. Subsequently, the validity of the proposed model is verified by the experimental data of the single wheelset rolling vibration test bench. Furthermore, the typical fault forms of bearings are simulated, and consequently their effects on bearing vibration characteristics is analyzed. Moreover, the effects of fault size, rotational speed and bearing radial clearance on the system dynamic response are studied by using the eigenvalue of the covariance matrix and root mean square (RMS) value. The results show that track irregularity greatly increases bearing vibration, thermal deformation also causes bearing vibration to intensify. On the other hand, lubrication can effectively reduce bearing vibration. Additionally, the size and location of local bearing faults, along with rotational speed and radial clearance of bearings have great influence on the eigenvalue of the covariance matrix of bearing inner ring and outer ring. Correspondingly, the RMS value of bearing vibration also varies significantly under different speeds. © Springer Nature Singapore Pte Ltd. 2025.

关键词： Bearing Lubrication Thermal deformation Track irregularity

来源：评论

学校读者我要写书评

暂无评论

A NOVEL BEARING FAULT DIAGNOSIS METHOD BASED ON FEATURE FUSION AND CONVOLUTIONAL NEURAL NETWORK 1

A NOVEL BEARING FAULT DIAGNOSIS METHOD BASED ON FEATURE FUSI...

引用

1st International Conference on mechanical system Dynamics, ICMSD 2022

作者： Zhao, Jing Yang, Shaopu Li, Qiang Liu, Yongqiang School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang China School of Mechanical Engineering Shijiazhuang Tiedao University Shijiazhuang China

ISBN: (数字)9781839537837

ISBN: (纸本)9781839537837

The effective fault diagnosis method is crucial for the engineering. At present, the fault diagnosis methods based on data-driven have achieved much attention. The traditional methods only utilize one sensor or one channel data. However, there are more than one sensor or channel in the data acquisition system. To take full advantage of the connection between different channels data, a bearing fault diagnosis method based on feature fusion and convolutional neural network is put forward in this paper. First, two different channels data are fused to obtain different fault features. Then, convolutional neural network is applied to classify the different faults through the fusion features. Finally, the performance of the proposed approach is verified by the drive train dynamics simulator test. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Failure analysis

来源：评论

学校读者我要写书评

暂无评论

Effects of Day-Night Temperature Fluctuations on Top-Down Cracking Development in Road structures

SSRN

引用

SSRN 2025年

作者： Li, Ting Qiao, Haoyu Xu, Peng Yang, Guangqing Faculty of Engineering University of Porto Porto4200 465 Portugal State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang050043 China

Top-down cracking has become a significant issue in road structures. Temperature is a key factor in the occurrence of top-down cracking. However, there is a lack of research on how day-night temperature fluctuations impact the propagation of top-down cracking in road structures, leading to an incomplete understanding of its development. This study employs the extended finite element method, which is an innovative approach for crack analysis, to create a simulation model of road structure with top-down cracking, integrating thermal boundary theory. The model's accuracy is confirmed through comparison with previous studies. The research then examines the temperature distribution and various influential factors, including ambient temperature, material properties, and cracking characteristics, using the stress intensity factor as the main indicator. Grey relational analysis is used to further investigate the effects of different parameters on the stress intensity factor. Additionally, the study explores the propagation path of top-down cracking in road structure under cyclic temperature loading. The findings provide new insights into the thermally-induced mechanisms behind top-down cracking development in road structures. © 2025, The Authors. All rights reserved.

关键词： Road construction

来源：评论

学校读者我要写书评

暂无评论

Influence of vehicle-road coupled vibration on tire adhesion based on nonlinear foundation

引用

Applied Mathematics and Mechanics(English Edition) 2021年第5期42卷 607-624页

作者： Junning ZHANG Shaopu YANG Shaohua LI Yongjie LU Hu DING School of Traffic and Transportation Shijiazhuang Tiedao UniversityShijiazhuang 050043China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang 050043China Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai UniversityShanghai 200072China

The influence of pavement vibration on tire adhesion is of great significance to the structure design of vehicle and *** adhesion between tire and road is the key to studying vehicle dynamics,and the precise description of tire adhesion affects the accuracy of dynamic vehicle ***,in most models,only road roughness is considered,and the pavement vibration caused by vehicle-road interaction is *** this paper,a vehicle is simplified as a spring-mass-damper oscillator,and the vehicle-pavement system is modeled as a vehicle moving along an Euler-Bernoulli beam with finite length on a nonlinear *** road roughness is considered as a sine wave,and the shear stress is ignored on the *** to the contact form between tire and road,the LuGre tire model is established to calculate the tire adhesion *** Galerkin method is used to simplify the partial differential equations of beam vibration into finite ordinary differential equations.A product-to-sum formula and a Dirac delt function are used to deal with the nonlinear term caused by the nonlinear foundation,which realizes the fast and accurate calculation of super-high dimensional nonlinear ordinary differential *** addition,the dynamic responses between the coupled system and the traditional uncoupled system are compared with each *** obtained results provide an important theoretical basis for research on the influence of vehicle-road coupled vibration on tire adhesion.

关键词： vehicle system dynamics vehicle-road coupled vibration LuGre tire model Galerkin method

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：