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检索条件"丛书名=Lecture Notes in Mechanical Engineering"

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An Investigation into the Effect of the Number of the Rubber Blocks of a Resilient Wheel on Wheel-Rail Noise 14th

An Investigation into the Effect of the Number of the Rubber...

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14th International Workshop on Railway Noise (IWRN)

作者： Zhou, Q. He, Y. Xu, F. Sheng, X. He, Y. Liu, Z. Southwest Jiaotong Univ State Key Lab Tract Power Chengdu Sichuan Peoples R China East China Jiaotong Univ Engn Res Ctr Railway Environm Vibrat & Noise Nanchang Jiangxi Peoples R China Southwest Jiaotong Univ Fac Geosci & Environm Engn Chengdu Sichuan Peoples R China Shudao Investment Grp Co Ltd Chengdu Sichuan Peoples R China

ISBN: (纸本)9789819978519;9789819978526

Resilient wheels are widely used in trams due to their ability to reduce noise and vibration. A resilient wheel typically consists of a steel rim, a steel wheel core, a rubber layer, and a press-fit ring on the tram. The rubber layer, which contributes to the noise and vibration reduction, is formed by rubber blocks that are uniformly separated in the circumferential direction. These gaps between the rubber blocks allow for free deformation of the blocks in the circumferential direction, resulting in a lower stiffness than that of a continuous rubber layer. To facilitate the press-fit process, the rubber layer is divided into blocks. This paper employs a wheel/rail noise prediction model to investigate the effect of the number of rubber blocks on wheel-rail noise.

关键词： Resilient wheel Rubber blocks Wheel-rail noise

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The Influence of Transient Tire Force Transmission on Sideslip Angle Estimation 16th

The Influence of Transient Tire Force Transmission on Sidesl...

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16th International Symposium on Advanced Vehicle Control

作者： Puscul, Dzenana Schabauer, Martin Le, Cornelia Graz Univ Technol Inst Automot Engn Inffeldgasse 11-2 A-8010 Graz Austria

ISBN: (纸本)9783031703942;9783031703928;9783031703911

Knowledge of the sideslip angle is significant in development, testing and validation of advanced driver assistance systems and vehicle control systems, to enhance vehicle performance and stability. This article investigates the influence of having additional information about transient tire behavior during estimation of the sideslip angle. Since transient behavior depends on the dynamic excitation, the effect during different driving maneuvers (excitations) such as steady-state cornering, slalom and general handling as well as on different road surfaces is investigated. The results show that considering transient force transmission even by a pragmatic approach leads to a significant improvement.

关键词： Sideslip angle State estimation Transient tire behavior Tire force dynamics Tire relaxation Vehicle handling dynamics

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Analysis of the Mechanism of Rail Corrugation by Using Temperature Dependent Friction Coefficient 14th

Analysis of the Mechanism of Rail Corrugation by Using Tempe...

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14th International Workshop on Railway Noise (IWRN)

作者： Ma, Kuikui Yang, Xinwen Tongji Univ Shanghai Key Lab Rail Infrastruct Durabil & Syst Shanghai 201804 Peoples R China Tongji Univ Key Lab Rd & Traff Engn Minist Educ Shanghai 201804 Peoples R China

ISBN: (纸本)9789819978519;9789819978526

In order to investigate the mechanism of rail corrugation on small radius curves, a three-dimensional wheelset-track thermal-mechanical coupling finite element (FE) model was developed. Friction coefficients are modeled in consideration of the wheel-rail contact temperature effects. The dynamic response of the wheelset-track system is investigated by transient analysis on a curved track with a radius of 350 m. The results show that the wheelset-track coupling dynamic system exhibits lateral stick-slip motion on the wheelset-low rail. The wheel-rail lateral creepages have obvious periodic fluctuations with dominated frequencies of 410 and 1045 Hz, In addition, The dominated frequencies of the wheel lateral vibration velocity on contact point as well as the dominated frequencies of lateral force are similar to dominated frequencies of the creep force. During a stick-slip process, the maximum temperature of the wheel-rail contact patch temperature increases with the creepages. The percentage of sliding region within the contact patch increases from 77.1 to 100%. The stick-slip vibration of the wheelset-low rail may lead to the occurrence of rail corrugation, which corresponds to wavelengths of 40.6 and 15.9 mm.

关键词： Rail corrugation Stick-slip process Friction coefficients Temperature

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Using Kamishibai Tool to Restructure the Audit Process System of an Aeronautical Company 32nd

Using Kamishibai Tool to Restructure the Audit Process Syste...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Marinho, Eduardo Alves, Anabela C. Abreu, Florentina Univ Minho Campus Azurem Guimaraes Portugal Univ Minho ALGORITMI LASI Campus Azurem Guimaraes Portugal

ISBN: (纸本)9783031381645;9783031381652

This paper presents the effectiveness of Kamishibai audits use in restructuring the audit system on a daily basis in the aeronautical sector. This lean tool has a strong visual component allowing to verify if the numerous processes and activities are in accordance with the company's standards, triggering improvement opportunities in all audited areas. The paper objective is to present how this tool was developed and implemented, being described the audit framework, requirements to be audited, the many cards guiding the auditor, the operating method and how useful this tool can be even in large productive process audits. In order to demonstrate this tool effectiveness, an application example to four pilot areas in the company is presented, taking into account some pre-established restrictions. There is a practical motivation due to the existence of numerous non-conformities registered in previous audits. With this tool, company gains were: less audits, audit reduced cost of 5.000 (sic)/year, more non-conformities corrected, reduced time performing the audits. These audits can be successfully used to assess industry standards and increase internal control.

关键词： aeronautic audit Kamishibai lean standards

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Recyclability Assessment of Lignocellulosic Fiber Composites: Reprocessing of Giant Reed/HDPE Composites by Compression Molding 1

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Suarez, Luis Mhuiri, Aoife Ni Millar, Bronagh McCourt, Mark Cunningham, Eoin Ortega, Zaida Univ Las Palmas Gran Canaria Dept Ingn Mecan Las Palmas Gran Canaria Spain Queens Univ Belfast Sch Mech & Aerosp Engn Stranmillis Rd Belfast North Ireland Queens Univ Belfast Sch Mech & Aerosp Engn Polymer Proc Res Ctr Belfast North Ireland Univ Las Palmas Gran Canaria Dept Ingn Proc Las Palmas Gran Canaria Spain

ISBN: (数字)9783031564741

ISBN: (纸本)9783031564765;9783031564741

This study verified the possibility of recycling polyethylene-based composites with up to 40% of lignocellulosic reinforcement after 5 cycles of compression molding, milling and extrusion. Two forms of filler from the same plant species, Arundo donax L., were studied, namely, fibers and shredded aerial parts of the plant. The properties of composites were assessed at each processing step, finding that the reprocessing affects to more extend the particulate filler than the fibrous one;the lower particle size resulted in lowered tensile properties. However, despite the fiber size reduction, as aspect ratio is not drastically diminished, the better dispersion of the fibers in the matrix counteracts the negative effects of their shorter size. Impact properties are improved with the recycling, possibly due to the increased homogeneity of the samples, which is also translated into a higher density (and lower porosity). The thermomechanical stability of the fiber composites is higher than for the shredded ones. The reduction in size of the fillers is reflected in the lowered viscosity obtained after the reprocessing. The fibers continue stiffening the matrix after the 5 reprocessing cycles, where the milled material acts more as a filler, reducing tensile properties, although showing a good flexural behavior.

关键词： Lignocellulose Natural Fiber Composite Recycling Compression Molding

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3D Finite Element Model for Simulation of mechanical and Electrochemical Effects on Corrosion Defect of Pipeline 10th

3D Finite Element Model for Simulation of Mechanical and Ele...

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10th International Conference on Design and Modeling of mechanical Systems (CMSM)

作者： Feki, Mohamed Said Zghal, Souhir Koubaa, Sana Bouaziz, Zoubeir Abdelmoula, Radhi Univ Sfax Natl Engn Sch Sfax Lab Appl Fluid Mech Environm & Proc Engn LR11ES57 Sfax 3038 Tunisia Univ Paris XIII LSPM CNRS UPR 3407 99 Ave Jean Baptiste Clement F-3407 Villetaneuse France

ISBN: (纸本)9783031671517;9783031671524

This paper deals with the effects of mechanical and electrochemical interactions on the corrosion defect of a pipeline of material grade X100. The pipeline is subjected to tensile strains from the soil and internal pressure in near-neural pH solution. The key idea of this paper is the introduction of newly 3D finite element model for the prediction of coupled mechanical and electrochemical effects on corrosion behavior of the pipeline instead of 2D finite element models commonly used in the literature. The model combines cylindrical metals, electrolyte and electrochemical interface kinetics coupled within mechanical tensile strain induced by soil movement. The finite element simulation of corrosion defect of the pipeline under mechanical and electrochemical effects is performed by utilizing COMSOL MULTIPHYSICS 6.2 software. The simulated parameters covering the stress distribution, corrosion potential, and anodic and cathodic current densities as a function of the size defect and longitudinal tensile strain generate by the soil motion. The developed 3D finite element model is sufficiently reliable to predict the corrosion phenomenon on pipelines under mechanical conditions.

关键词： Corrosion Pipeline Mechano-electrochemical Defect Finite element COMSOL

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Setup Operation Time Estimation System for the Adoption of Cyber-Physical Systems in High-Mix Low-Volume Production 33rd

Setup Operation Time Estimation System for the Adoption of C...

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33rd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Matsuno, Kotomichi Hasegawa, Yasumasa Liyanaarachchi, Nirmala Weng, Jiahua Watanabe, Ruriko Tanimizu, Yoshitaka Takata, Shozo Kobayashi, Yudai Kudo, Shun Waseda Univ 3-4-1 OkuboShinjuku Ku Tokyo 1698555 Japan Kanagawa Univ 3-27-1 Rokkakubashi Yokohama Kanagawa 2218686 Japan DENSO Corp 1 YoshiikeKusagiAgui Cho Chita Aichi 4702298 Japan

ISBN: (纸本)9783031744815;9783031744822

The development and application of CPS (Cyber Physical System) to shop floor management has gained particular attention for its potential to revolutionize traditional manufacturing practices in recent years. However, applications in one-piece flow production or in low-volume, high-mix production, where it is necessary to deliver on time under high uncertainty in operations, has not yet made significant progress. Especially for SMEs (small and medium-sized enterprises) facing budget constraints, the investment for CPS implementation is challenging. Simplified performance management systems using devices like smartphones for manual input have been developed, and their adoption in the field is progressing. Such systems enable the identification of issues in work and production processes using collected data. However, improving accuracy of estimates for operation time and improving precision of production planning remains a challenge due to the limitations in accuracy of collected performance data. In this study, we propose a set-up time estimation system for the machining process of mold production, despite the limited amount of data and low data accuracy. It incorporates a cleansing algorithm based on both actual performance data and the expertise of experienced workers, along with an estimation model utilizing this cleansing algorithm. The effectiveness of the proposed system is examined through numerical experiments based on real-world data.

关键词： Cyber Physical Systems Actual work performance data High-Mix Low-Volume Production Production Scheduling

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Proposal for a Digital OEE Architecture with the Integration of Analysis Parameters of Machines of the Manufacturing Industry 32nd

Proposal for a Digital OEE Architecture with the Integration...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Camatti, Juliane Andressa Fernandes, Ederson Carvalhar Borsato, Milton Lisboa, Maycon Jesus, Elcio Ricardo de Carvalho Romanel, Luiz Gustavo Univ Tecnol Fed Parana UTFPR Grad Sch Mech Engn & Mat PPGEM CT Campus CuritibaR Dept Heitor Alencar Furtado St BR-81280340 Curitiba Parana Brazil CNH Ind Juscelino Kubitscheck Oliveira Ave 11825 BR-81020490 Curitiba Parana Brazil

ISBN: (纸本)9783031381645;9783031381652

Sudden and unexpected economic changes associated with market competition and short product life cycles have generated significant organizational challenges. Thus improvements in processes and product characteristics can directly interfere with their production capacity. To identify improvements in the process, it is fundamental to analyze how the process is developing and, based on that, make favourable decisions. Today, several companies analyze their data, but most of these are done by manually collected data, which brings much uncertainty and can delay the analysis and decision-making process. The present work aims to propose a digital architecture to calculate the OEE (Overall Equipment Effectiveness) for machines in the manufacturing industry. The relationship between the behaviour parameters of the machines allows for diagnosing critical factors for the production system, namely performance, availability, and quality. The machine parameters presented in a short period allow faster action by operators in cases of failures in the activity, and greater security in the planning of the production process, as well as in the development of products and maintenance schedules, directly impacting the production cost. The project's innovation is carried out through digital data modelling based on the ETL context with parameters derived from the behaviour of a machine, where they are dynamically processed and correlated in the Desktop software to illustrate the calculated OEE value.

关键词： OEE Industry4.0 Architecture

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Exploring the Potential of Digital Twins for New Product Design and Development: A Review of Research Gaps 8th

Exploring the Potential of Digital Twins for New Product Des...

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Sobowale, Adeniyi Lopes, Helena Trojanowska, Justyna Lima, Ana Marujo, Pedro Machado, Jose Univ Minho Guimaraes Portugal Poznan Univ Tech Poznan Poland CCG ZGDV ICT Innovat Inst Guimaraes Portugal Sonae Arauco Portugal SA Oliveira Do Hosp Portugal

ISBN: (纸本)9783031564468;9783031564444

A rapidly developing technology, digital twins have the potential to completely change how products are designed and developed. Digital twins enable the simulation of the performance of various design concepts, the identification of potential issues with a design, and the optimization of the design for certain performance needs. However, in terms of digital twins and their utilization in product development, there are some gaps in the existing literature. There is also a lack of a standardized digital twin framework. There is currently no structure for creating and utilizing digital twins that is universally approved. Because of this, it is challenging for many organizations to share and work together on digital twin initiatives. Another aspect to consider is the huge investment of putting digital twin technology into practice. Implementing digital twin technology can be costly, particularly for large and complicated products. This may prevent small and medium-sized firms from adopting the technology. Real-time data integration is also lacking. For digital twins to be accurate, the physical product must provide real-time data. Getting real-time data from sensors and other devices might, however, be challenging to include into the digital twin. This paper examines the bibliographic research gaps concerning the use of digital twins specifically for new product design and development. The report also addresses some solutions and how the limitations might affect the development of digital twin technologies in the future.

关键词： Digital Twin Product lifecycle management PLM Research gaps Real-time monitoring

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Optimization of Surface Roughness in Laser Cutting Process of Mild Steel Using RSM and GA Method 32nd

Optimization of Surface Roughness in Laser Cutting Process o...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Shamlooei, Majid Zanon, Gabriele Brugnolli, Marco Vanin, Mattia Bursi, Oreste S. Univ Trento Dept Civil Environm & Mech Engn I-38123 Trento TN Italy Adige Sys BLM Grp I-38056 Levico Terme TN Italy

ISBN: (纸本)9783031382406;9783031382413

In the laser cutting process, cutting parameters play a crucial role in determining the quality of the cut surface. In this study, a fiber laser machine was used to cut mild steel S355 with a thickness of 12 mm. The response surface method (RSM) and genetic algorithm (GA) were employed to optimize the cutting parameters assuming the surface roughness as the response of the process. The main parameters investigated are cutting speed, laser power, gas pressure, focus position, nozzle diameter, and stand-off. Due to the importance of the surface roughness of structural steel elements cut by means of thermal processes in agreement with the standard EN ISO 9013 the correlation between the input parameters and the surface roughness was investigated. In detail, analysis of variance (ANOVA) was used to assess the model and investigate significant parameters and their interactions on the surface roughness. The nonlinearity of the problem and the complex influence of the parameters and their interaction on the roughness was studied considering all six cutting parameters which were not studied well by others before. Eventually, after optimization process and finding the optimal parameters, the validation of the study was carried out on additional specimens cut using predicted-optimized laser cutting parameters. The good agreement between experimental and predicted surface roughness highlights the capability of the approach to drive the choice of the laser cutting parameters.

关键词： Laser cutting process Surface roughness Optimization

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