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A Closer Look at the Design of Cutterheads for Hard Rock Tunnel-Boring Machines

Jamal Rostami, Soo-Ho Chang

Engineering 2017, Volume 3, Issue 6, Pages 892-904 doi: 10.1016/j.eng.2017.12.009

Abstract: machine (TBM) in a given project depends on the functionality of all components of the system, from the cuttersdesign of the cutterhead impacts the efficiency of cutting, the balance of the head, the life of the cuttersgearbox, and the effectiveness of the mucking along with its effects on the wear of the face and gage cuttersAlthough there has been some discussion in commonly available publications regarding disk cutters, cutting

Keywords： TBM cutterhead design Cutterhead layout Disk cutters Cutting pattern TBM efficiency

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: The disc cutters of shield machines exhibit unsatisfactory adaptability and performance during the soft–hardTo analyze the rotation state, cutting performance, and adaptability of disc cutters during shield tunnelingThe results of numerical calculation can reflect the load level and the behavior of the disc cuttersThe tangential loads of the disc cutters during the cutting of four typical soft-strata excavation faceThe disc cutters in the center of the cutterhead should be specified with a lower starting torque to

Keywords： shield tunneling disc cutter load laboratory excavation test numerical calculation soft–hard varied strata

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Dynamics analysis of a cracked dual-disk over-hung rotor-bearing system

CHEN Hong, LI He, WEN Bang-chun, ZHANG Xiao-wei

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 2, Pages 204-208 doi: 10.1007/s11465-006-0002-6

Abstract: A dynamic model of a dual-disk vertical over-hung rotor-bearing system is developed, taking into account

Keywords： nonlinear oil-film diagnosis bifurcation dynamic numerical Runge-Kutta

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Analytical study on damping performances of magnetorheological grease damper based on disk squeeze mode

Danxia ZHAO, Changrong LIAO, Qiong LIU, Jing LUO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 312-317 doi: 10.1007/s11465-011-0235-x

Abstract:

In this paper, a small displacement-type magnetorheological grease (MRG) damper based on disk squeezeproposed analytical method is feasible and provides the reference value for designing MRG damper based on disk

Keywords： magnetorheological grease (MRG) damper squeeze model

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Transient analysis of thermoelastic contact problem of disk brakes

Ali BELHOCINE, Mostefa BOUCHETARA

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2, Pages 150-159 doi: 10.1007/s11465-013-0266-6

Abstract: purpose of this study is to analyze the thermomechanical behavior of the dry contact between the brake diskThe modeling of transient temperature in the disk is actually used to identify the factor of geometricdesign of the disk to install the ventilation system in vehicles.then used with coupling to determine the deformation established and the Von Mises stresses in the disk

Keywords： brake disks heat flux heat-transfer coefficient Von Mises stress contact pressure

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A disk failure prediction model for multiple issues Research Article

Yunchuan GUAN, Yu LIU, Ke ZHOU, Qiang LI, Tuanjie WANG, Hui LI,hustgyc@hust.edu.cn,liu_yu@hust.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 7, Pages 964-979 doi: 10.1631/FITEE.2200488

Abstract: methods have been useful in handing a single issue, e.g., heterogeneous disks, model aging, and minority samples. However, because these issues often exist simultaneously, prediction models that can handle only one will result in prediction bias in reality. Existing methods simply fuse various models, lacking discussion of training data preparation and learning patterns when facing multiple issues, although the solutions to different issues often conflict with each other. As a result, we first explore the training data preparation for multiple issues via a data partitioning pattern, i.e., our proposed multi-property data partitioning (MDP). Then, we consider learning with the partitioned data for multiple issues as learning multiple tasks, and introduce the model-agnostic meta-learning (MAML) framework to achieve the learning. Based on these improvements, we propose a novel model named MDP-MAML. MDP addresses the challenges of uneven partitioning and difficulty in partitioning by time, and MAML addresses the challenge of learning with multiple domains and minor samples for multiple issues. In addition, MDP-MAML can assimilate emerging issues for learning and prediction. On the datasets reported by two real-world data centers, compared to state-of-the-art methods, MDP-MAML can improve the area under the curve (AUC) and false detection rate (FDR) from 0.85 to 0.89 and from 0.85 to 0.91, respectively, while reducing the false alarm rate (FAR) from 4.88% to 2.85%.

Keywords： Storage system reliability Disk failure prediction Self-monitoring analysis and reporting technology

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An Evaluation of Metronidazole Degradation in a Plasma-Assisted Rotating Disk Reactor Coupled with TiO Article

Yong Cai, Guang-Wen Chu, Yong Luo, Meng-Jun Su, Bao-Ju Wang, Bao-Chang Sun, Jian-Feng Chen

Engineering 2021, Volume 7, Issue 11, Pages 1603-1610 doi: 10.1016/j.eng.2020.03.020

Abstract: In this work, a plasma-assisted rotating disk reactor (plasma-RDR) and a photocatalyst—namely,

Keywords： Plasma-assisted rotating disk reactor Pulsed discharge Metronidazole Degradation TiO₂

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Thermal Effect Analysis of Frictional Disk in Speeding Wet Clutch

Hong Yue,Liu Jin,Wang Yungen

Strategic Study of CAE 2003, Volume 5, Issue 9, Pages 55-60

Abstract:

Multi-frictional disks are employed to transmit the torque in speeding wet clutch, and the oil thickness within frictional disks could be adjusted for practical output speeding. As oil combined with a-hydrocarbon or polyester is getting widely used as lubricant and the speeding wet clutch works within hydrodynamic lubrication, mixture lubrication, boundary lubrication and contact situations, the authors have established the thermal analysis model for investigating the behavior of frictional disks in speeding wet clutch, which covers the power - law fluid model, Patir - Cheng average flow model, GT asperity contact model, oil film inertia and heat effects, mean energy equation, and heat conduction equation. The formulas in the model have been inferred in this paper. The numeral calculation and analysis for hydrodynamic lubrication and mixture lubrication have been executed.

Keywords： speeding wet clutch thermal analysis Reynolds equation power-law fluid model roughness