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

共 6719 条记录，以下是221-230 订阅

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Simulation-Based Approach to Assess Impact of Increasing Skip Capacity for Underground Mining 32nd

Simulation-Based Approach to Assess Impact of Increasing Ski...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Badurdeen, Fazleena Bal, Alperen Agioutantis, Zach Hicks, Steve Univ Kentucky Dept Mech & Aerosp Engn Lexington KY 40506 USA Univ Kentucky Dept Min Engineer Lexington KY 40506 USA Amer Univ Middle East Coll Engn & Technol Egaila Kuwait Coronado Coal Co Buchanan Mine PO Drawer L Oakwood VA 3461 USA

ISBN: (纸本)9783031381645;9783031381652

Material excavated in underground mines must be hoisted to the surface level for processing and distribution. The capacity of these hoisting facilities, known as skips, can be a limiting factor that determines the rate at which excavated material can be removed to the surface. This paper presents the application of discrete event simulation to study the operations of an underground coal mining system to evaluate the impact of increasing skips capacity, together with adding buffers ahead of skips, and any bottlenecks that will be encountered. Different scenarios are considered to evaluate any variation in performance based on the area of the mine being excavated. The results reveal that adding a new skip facility can help increase monthly production output by more than 16% compared to the current levels, indicating a very favorable return on the investment. Findings also show that overall utilization of the skip facilities declines and that expected output is driven by the effective carrying capacity of the belt conveyors. Further research can be conducted to determine the effective buffer capacity and also the optimal effective belt conveyor carrying capacities to maximize production output.

关键词： Simulation mining skips belt conveyor

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A Quick Method to Determine Tank Capacity in the Pipe Network Due to Daily Fluctuation of Domestic Water Demand 1

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2022 International Association for Hydraulic Environmental engineering and Research Asia Pacific Division

作者： Triatmadja, Radianta Legono, Djoko Supraba, Intan Gadjah Mada Univ Dept Civil & Environm Engn Yogyakarta Indonesia

ISBN: (数字)9789819760091

ISBN: (纸本)9789819760084;9789819760091

The domestic water supply fluctuates along the day depending on the demand based on human activities. Most people are at rest at night, so water demands drop significantly. Water demands increase when people start their activities at home in the morning. Similarly, the water demand increases again when people come home from work in the afternoon. Typically, the peak water demand occurs either in the morning or afternoon. Usually, a pump and water tank system should be installed in the water distribution network to provide energy and smooth out the fluctuation so that water demands can be met at any time. The capacities of the pump and the tank should be determined based on the water demand fluctuation, which usually requires water balance modelling. In this research, typical domestic water demand is simulated to find the effect of the tank size, the pump capacity, and the number of pumping cycles per day. The simulations were conducted using WaterNet Software. The results produced a design curve that can quickly determine the combination of pump and tank capacities depending on the number of pump operation cycles without simulation.

关键词： Pipe network Pump-tank-system Domestic water Fluctuation Simulation

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Optimization of Operating Parameters for Laser Shock Peening Surface Treatment on Components Made from Nickel-Based Super-Alloy INCONEL 718 10th

Optimization of Operating Parameters for Laser Shock Peening...

引用

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

作者： Frija, Mounir Dali, Taha Ayeb, Manel Fathallah, Raouf Univ Sousse Inst Appl Sci & Technol Sousse ISSATSo Sousse Tunisia Minist Natl Def Air Force Borj El Amri Aviat Sch Borj El Amri Tunisia Univ Sousse Natl Engn Sch Sousse ENISo Sousse Tunisia Unit Mech Prod Engn & Mat UGPMM UR17ES43 BP 1173 Sfax 3038 Tunisia

ISBN: (纸本)9783031650062;9783031650079

This study is focused on the optimization of laser shock surface treatment for components made from the Nickel-based super alloy INCONEL718. The objective is to enhance the efficiency and effectiveness of this treatment process by leveraging the Design of Experiments (DoE) methodology. In our investigation, we delve into understanding the intricate relationship between the various treatment parameters and the distinct effects they induce during the process. By isolating and examining each parameter's influence on the outcomes, we aim to identify the critical factors that significantly impact the results. This systematic analysis allows us to pinpoint the optimal settings for laser shock treatment, thus minimizing waste and maximizing performance. Furthermore, a key aspect of this study involves the development of empirical mathematical models to approximate the results of numerical simulations. These mathematical formulations serve as valuable tools for aeronautical engineers tasked with modeling laser shock treatment. By translating complex simulation data into practical and actionable mathematical expressions, engineers can more accurately predict the outcomes of laser shock peening surface treatment under varying conditions. The integration of meticulous experimental design, statistical analysis, and empirical modeling offers a holistic approach to optimizing laser shock treatment. The findings from this research hold promise for refining the accuracy and dependability of this vital process in manufacturing components with INCONEL 718, thereby providing valuable advancements for the aerospace industry and its associated domains.

关键词： Laser Sock Peening INCONEL 718 Optimization Design of Experiments (DoE) Numerical simulations Aeronautical engineering

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Implementation of Human Gestures in the Control of Collaborative Robots 1

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Ciudin, Paul Goia, Horea Stefan Popister, Florin Tech Univ Cluj Napoca Cluj Napoca Romania

ISBN: (数字)9783031564673

ISBN: (纸本)9783031564697;9783031564673

The current paper explores the possibilities of introducing a gesture control method to command and collaborate with robots. In the first part, aspects of the current limitations of tele-robotic systems and the communication models adopted in the industry are presented. As for the method used to detect hand gestures, it was selected a machine learning model and shrank to run on a conventional microcontroller. By leveraging machine learning techniques, the precision and repeatability of the gesture-based commands were significantly improved. In the final part of the paper, the implementation stages are presented alongside the results of the gesture detection model. The proposed solution not only enhances the efficiency of the tele-robotics systems but also paves the way for resource efficiency on microcontrollers. Furthermore, the paper presents practical applications according to industrial technologies. The adaptability and versatility of the developed model make it a promising candidate for a wide range of applications.

关键词： Gesture recognition Embedded systems Tele-robotics

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Numerical Study on Nonlinear Isolation of Vibration Transmission from the Ship Propeller Shaft to the Deck Plate 15th

Numerical Study on Nonlinear Isolation of Vibration Transmis...

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15th International Conference on Vibration Problems (ICoVP)

作者： Vijayan, Kiran Rao, Prithvi IIT Kharagpur Dept Ocean Engn & Naval Architecture Kharagpur 721302 W Bengal India

ISBN: (纸本)9789819959211;9789819959228

Vibration-induced noise in a ship structure can be caused due to propeller shaft vibration. This vibration can cause problems for the passengers on a cruise ship. This study aims to develop a nonlinear model for a propeller shaft vibration and understand the effectiveness of a nonlinear isolator in reducing the vibration amplitude. The vibration from the propeller shaft is transmitted to the deck plate. The coupled system of the propeller shaft and the deck plate is modelled as a two-degree-of-freedom system. The propeller produces high response due to synchronous whirl and instabilities such as oil whirl and dry whip. In order to incorporate the nonlinear modal interactions, the propeller shaft is modelled as a nonlinear duffing oscillator. Vibration from the propeller shaft is transmitted to the deck plate. The deck plate is modelled as a spring mass system having coincident frequency with the synchronous whirl frequency. The propeller shaft is coupled using a linear and nonlinear isolator to the deck plate. Vibration isolation devices are used to protect systems from unwanted vibration force or displacement, positioned between the source of the disturbance and the equipment that has to be protected. The study aims to understand the isolator's influence in controlling the vibration transmitted to the deck plate. Two types of isolators are considered in the study linear and nonlinear isolators. The passive nonlinear isolator is modelled as a cubic spring which induces a high static and low dynamic stiffness. The nonlinear coupled two-DOF system is solved using the harmonic balance method and compared using numerical continuation. The result from the study indicates that the nonlinear isolator effectively reduces the vibration on the deck plate.

关键词： Vibration isolation Nonlinear passive isolator Numerical continuation Harmonic balance Duffing oscillator

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Influence of Vibration Isolator Stiffness on the Dynamic Performance of a Steel-Floating Slab Track 15th

Influence of Vibration Isolator Stiffness on the Dynamic Per...

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15th International Conference on Vibration Problems (ICoVP)

作者： Bashir, Shamsul Mandhaniya, Pranjal Akhtar, Nasim Acad Sci & Innovat Res AcSIR Ghaziabad 201002 India CSIR Cent Rd Res Inst New Delhi 110025 India Indian Inst Technol Delhi Dept Civil Engn Delhi 110016 India

ISBN: (纸本)9789819959211;9789819959228

The floating slab track (FST) is the most efficient structure for mitigating the vibrations caused by underground railway systems. The analytical model for the steel-floating slab track system (SFST) was developed using a conventional mathematical approach based on influence lines to calculate the deflections, vibration attenuation, and stresses. The developed system was validated through the fatigue verification test. The effect of the decrease in stiffness of the steel-spring isolator (SSI) on the dynamic performance of the slab track was analyzed and compared. It was found that the vibration attenuation efficiency of the system increases significantly as the stiffness of the SSI decreases. However, lowering the stiffness of the isolator increases the dynamic deflections and hence results in higher stresses causing the fatigue failure of the system. Although implementing the SFST with lower stiffness decreases the natural frequency, it may raise concerns regarding slab track damage. Therefore, it is necessary to evaluate the reasonable stiffness of the SSI to achieve satisfactory vibration attenuation as well as the safe design of the slab track system.

关键词： Steel-spring isolator Floating slab track Stiffness Vibration attenuation Deflection Fatigue failure

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Profile Generation of Cooperative Driving in Urban Intersections for Energetic Evaluation 16th

Profile Generation of Cooperative Driving in Urban Intersect...

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16th International Symposium on Advanced Vehicle Control

作者： Flormann, Maximilian Sturm, Axel Henze, Roman Raksincharoensak, Pongsathorn Tech Univ Carolo Wilhelmina Braunschweig Inst Fahrzeugtech D-38106 Braunschweig Germany Tokyo Univ Agr & Technol Dept Mech Syst Engn Fuchu Tokyo Japan

ISBN: (纸本)9783031703942;9783031703928;9783031703911

In the context of urban smart mobility, automated vehicles communicating with each other, surrounding infrastructure, and other traffic participants yield the use for cooperative driving in urban environments. This, alongside an increase in safety and comfort, can help to reduce fuel and energy consumption individually and with regard to the cooperative vehicle cluster. In this paper we are addressing the impact urban cooperative driving has on the energy consumption of electric vehicles and further investigate the impact on drive systems and their layout, as well as the impact different control strategies of the cooperative network and scenarios with varying vehicles densities have. In order to evaluate the impact, defined driving profiles from a graph based optimization for cooperation networks are evaluated with regard to their energy consumption. Based upon the results the overall energetic impact of different intersection approaching strategies as well as the drive system impact are discussed.

关键词： Automated driving electric drive systems energy consumption reduction cooperative driving drive system optimization graph optimization

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Optimal Path Generator Embedded Model Predictive Control for Automated Vehicles 16th

Optimal Path Generator Embedded Model Predictive Control for...

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16th International Symposium on Advanced Vehicle Control

作者： Sago, Takashi Arai, Yoshihide Ueyama, Yuki Harada, Masanori Natl Def Acad Japan 1-10-20 Hashirimizu Yokosuka Kanagawa Japan

ISBN: (纸本)9783031703942;9783031703928;9783031703911

This paper investigates real-time optimal control for an automated vehicle. The model predictive control that generates the optimal trajectories has found wide applications in recent years due to increased computational performance. Numerical simulations of the full-vehicle model investigate the applicability of a path generator embedded model predictive control for the vehicle in the general shape road. The path generator is constructed by deep learning using the multiple open-loop optimal control problem solutions as the training dataset. Results demonstrate that the sequentially calculating optimal control command has the potential for real-time optimal control in the presence of the obstacle.

关键词： Real-time optimal control Trajectory generation Full vehicle model Deep-learning neural network

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Ball Burnishing Parameters Affecting the Residual Stress of the Zr65Cu15Al10Ni10 Metallic Glass 10th

Ball Burnishing Parameters Affecting the Residual Stress of ...

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

作者： Bouzayeni, Sami Gharbi, Fathi Benameur, Tarek Al-Fadhalah, Khaled J. Univ Monastir LR99ES32 ENIM Mech Engn Lab Monastir Tunisia Univ Kairouan ISSATKR Inst Super Sci Appl & Technol Kairouan Kairouan Tunisia Kuwait Univ Coll Engn & Petr Mech Engn Dept Safat 5969 Kuwait

ISBN: (纸本)9783031650062;9783031650079

Ball burnishing (BB) is a superfinish operation performed to improve surface, subsurface quality and mechanical proprieties. In the present study, a bi-dimensional (2D) finite element model (FEM) was developed to confirm that the BB of Zr65Cu15Al10Ni10 bulk metallic glass (BMG) affects its microstructures, roughness, and residual stress. As a part of the process, the influence of different parameters on the residual stress surface in the axial and transverse directions was investigated. The topography of the burnished samples is analyzed by an atomic force microscope (AFM) and scanning electron microscope (SEM). The ball burnishing process was performed, and the improvements in the surface and subsurface integrity were found to be significant. Residual stress after BB was found to be affected by burnishing force to a statistically significant extent. The Zrbased BMGdisplayed significant improvements in surface roughness and residual stress following the burnishing process. The topographical and morphological results of the treated samples show a variation of irregularity of the burnished faces and the formation of the shear bands (SBs) below the hardened layer. The FE simulation results indicate that the residual stress values and depth are increased by the increase of burnishing force. The ball burnishing process enhanced the surface topography and produce the residual stress on the Zr-BMG samples.

关键词： Bulk Metallic Glass Ball Burnishing Residual stress Surface topography Finite Element Modeling

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Non-destructive Crack Detection Methodologies in Green Compacts: An Overview 32nd

Non-destructive Crack Detection Methodologies in Green Compa...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Mustafa, Sameen Peer, Angelika Concli, Franco Free Univ Bozen Bolzano Fac Sci & Technol Bolzano Italy

ISBN: (纸本)9783031382406;9783031382413

Powder metallurgy (PM) is a rapidly growing field that offers a cost-effective way to manufacture complex-shaped metal components with superior properties compared to conventional manufacturing methods. However, PM involves the production of green compacts, which are prone to defects such as cracks, voids, and inclusions due to their fragile nature. These defects can compromise the final properties of the sintered components, resulting in high rejection rates and increased costs. Therefore, the need for reliable and efficient non-destructive testing (NDT) methods to detect defects in green compacts has become a focal point of research. Traditional methods for crack detection are based on destructive imaging techniques, where, polished sections of the specimen are observed under an optical microscope or scanning electron microscope. These methods, however, are time-consuming and cannot predict the initiation and likelihood of a crack in green compacts. In contrast, this study reviews different NDT methods proposed by researchers in the field to detect cracks and defects in green compacts. The discussed NDT methods include thermal imaging, X-Ray imaging, acoustic and ultrasound testing (UT), eddy current based testing (ECT), camera-based techniques, and simulations based on the Drucker-Prager Cap (DPC) model. We further review the usage of machine learning (ML) techniques for classification and decision-making. All methods are introduced along with a discussion of their limitations and merits.

关键词： Crack detection green compacts NDT

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