A5101713593- Metallurgy and Material Forming
- Magnetic Bearings and Levitation Dynamics
- Metal Forming Simulation Techniques
- Metal Alloys Wear and Properties
- Powder Metallurgy Techniques and Materials
- Railway Engineering and Dynamics
- Metallurgy and Material Science
- Advanced machining processes and optimization
- Structural Engineering and Vibration Analysis
- Laser and Thermal Forming Techniques
- Geotechnical Engineering and Underground Structures
- Transportation Safety and Impact Analysis
- Civil and Geotechnical Engineering Research
- Mechanical stress and fatigue analysis
- Aluminum Alloys Composites Properties
- Vibration and Dynamic Analysis
- Microstructure and mechanical properties
- Geotechnical Engineering and Analysis
- Tunneling and Rock Mechanics
- Aluminum Alloy Microstructure Properties
- Automotive and Human Injury Biomechanics
- Cell Image Analysis Techniques
- Gear and Bearing Dynamics Analysis
- Cellular and Composite Structures
- Microstructure and Mechanical Properties of Steels
Zhengzhou Railway Vocational & Technical College
2008-2025
Huawei Technologies (China)
2023
Research Institute of Highway
2023
Ministry of Transport
2023
Southwest Jiaotong University
2006-2022
CRRC (China)
2019
Huanghuai University
2018
General Research Institute for Nonferrous Metals (China)
2006-2012
Nanjing University of Science and Technology
2010-2012
This paper summarizes the research on passive safety of rail vehicles from perspective Crash Energy Management (CEM) in recent decades, which covers analysis main crashworthiness standards, as well latest progress theoretical methods, numerical simulation, and experimental technology crashworthiness. According to status each subject, some weak links potential suggestions are pointed out, such requirements CEM influence mechanism coupler under different collision speeds, structural...
In this work, we share our experience on tele-knowledge pre-training for fault analysis, a crucial task in telecommunication applications that requires wide range of knowledge normally found both machine log data and product documents. To organize from experts uniformly, propose to create Tele-KG (tele-knowledge graph). Using valuable data, further tele-domain language model TeleBERT its knowledge-enhanced version, re-training KTeleBERT. which includes effective prompt hints, adaptive...
Train-track-bridge dynamic tests were conducted on the Shanghai Lingang Medium and Low Speed Maglev Test Line. A newly developed levitation bogie with mid-set air spring was used test train. The results show that: vertical lateral first-order natural frequencies are 7.50 Hz 6.00 Hz, respectively; vehicle speed has no significant effect displacement of bridge; within specific ranges, acceleration train-track-bridge system shows monotonic variation characteristics as changes; accelerations...
Levitation stability is the very basis for dynamic operation of Electromagnetic Suspension (EMS) medium-low speed maglev trains (MSMT). However, self-excited vibration tends to occur when vehicle standing still above lightweight lines, which remains a major constraint promotion technology. In order study vertical characteristics coupled system MSMT it levitation tests were carried out on two types steel beams: beam and active girder turnout, with newly developed using frames mid-set air...
Semi-solid AZ91D magnesium slurry was prepared by mechanical stirring method and the evolution of microstructure under different technological parameters such as casting temperature, standing time, time speed et al were studied. The results show that have great influence on semi-solid slurry. Neither too high nor low is a benefit to form state; also not long; higher temperature unfavorable; with increasing steady-state apparent viscosity increases rapidly, number nucleation crystalline...
In order to study the impedance characteristics of frictional draft gear, MT‐2 gear is studied, and its mechanical properties are analyzed firstly. Then, mathematical models two common gears established based on data collected from vehicle impact test, effects modeling methods simulation results compared through shunting test bench simulation. Researches show that, under various experimental conditions, simulated characteristic curve lookup table model moves along a fixed trajectory...
In stamping process, springback is always determined by process parameters, such as blank-holder force, mould material and so on. Prediction of parameters a multi-objective optimization problem. Firstly, based on the same quantity orthogonal experimental samples, prediction accuracy efficiency back propagation neural network (BPNN) model response surface (RSPM) for S-Rail forming were compared. As result, RSPM was adopted benefit to less influence sample scale higher accuracy. Furthermore,...
Because of the situation that disc cutter bearing seriously damaged in cutting process, structural parameters is optimized which mainly affect force on bearing. The edge angle, width, transition arc radius and caulking ring width between bearings are taken as design variables, minimum equivalent load target, optimization model established. Genetic Algorithm (GA) used mathematical model.Finally, results indicate reduces 21% compared with actual parameters. So effectively reduce extend life...
Direct Continuous Casting (D.C.C) is an important method in casting lead frame copper alloy. In this paper, numerical simulation adopted to investigate the process order optimize D.C.C technical parameters, such as temperature, speed and cooling intensity. According results, reasonable parameters are that temperature between 1413 K∼1413 K, 8 m/h∼10 m/h of water 4.2 m/s∼4.6 m/s. And depth liquid‐solid boundary measured different by experiments. The results show actual measurements have a...
A parameter-selection method is proposed to improve the accuracy of truncated singular value decomposition (TSVD) method, which based on Wilson-θ and principle minimum response error, for dynamic load identification. First, using Green kernel-function matrix, load-identification model multi-degree-of-freedom system established. Second, corresponding identified error between input obtained. Then, best regularization parameters are obtained, TSVD method. Finally, SIMPACK a rail vehicle Taking...
Quantitative analysis of image-based phenotype is significant importance in zebrafi sh image and high-content screening. In this paper, an automatic pipeline proposed for quantification the curvedness zebrafish embryo tails. First, embryos are extracted based on active contour model, then its skeleton line generated by principal graph algorithm. Several measures tail designed compared, experimental results show that joint consideration shape relative position relationship can result better...
Extrusion process of a large diameter thin-walled aluminum profile was simulated by FEM based on Deform-3D software. The results show that the material flow velocity in bearing exit original designed die is non-uniform. Three times modifications were performed and simulated. optimal design with more uniform obtained.
The three-dimensional explicit dynamic analysis of metal cutting process is done using the non- linear finite element software LS-DYNA. In model, 8- node 3D solid based on one- point integration Lagrangian formulation adopted, material modeled with Johnson-Cook constitutive chip separation simulated failure criterion Johnson and Cook proposed combing deletion method, friction model chip-tool contact interface developed to simultaneously account for sticking sliding situation. Through...
To improve material flow of sheet metal, draw beads are used to prevent wrinkling and springback during deep drawing process. Firstly, taking BenchMark2 "S-Rail-08" NUMSIHEET’2008 as a study case, based on the orthogonal tests finite element simulation stamping process, prediction model which adopts response surface method (RSM) was proposed predict influenced by parameters approximately. Then, in order reduce springback, non-dominated sorting genetic algorithm (NSGA-II), is implemented...