Long Chen

ORCID: 0000-0003-2584-7323
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About
Contact & Profiles
Research Areas
  • Electrical Contact Performance and Analysis
  • Railway Engineering and Dynamics
  • Railway Systems and Energy Efficiency
  • Mechanical stress and fatigue analysis
  • Electric Motor Design and Analysis
  • Thermal Analysis in Power Transmission
  • Mechanical Engineering and Vibrations Research
  • Electrical Fault Detection and Protection
  • Tribology and Wear Analysis
  • Wind and Air Flow Studies
  • Urban Heat Island Mitigation
  • Electric and Hybrid Vehicle Technologies
  • Agriculture and Farm Safety
  • Building Energy and Comfort Optimization
  • Infrastructure Maintenance and Monitoring
  • Guidance and Control Systems
  • Refrigeration and Air Conditioning Technologies
  • Power Systems Fault Detection
  • Magnetic Bearings and Levitation Dynamics
  • Lubricants and Their Additives
  • Soil Mechanics and Vehicle Dynamics
  • Advanced Sensor and Energy Harvesting Materials
  • Hydraulic and Pneumatic Systems
  • Advanced Energy Technologies and Civil Engineering Innovations
  • Vibration Control and Rheological Fluids

Taiyuan University of Technology
2025

Southwest Jiaotong University
2021-2024

Jiangsu University
2019-2024

Harbin Institute of Technology
2021

Chongqing Vocational Institute of Engineering
2021

Shanghai Architectural Design & Research Institute
2019

Tsinghua University
2016

Chongqing Jiaotong University
2016

The rigid catenary system is widely used in tunnels to power electric trains via contact with a pantograph. Due gravity, the wire normally has sag that may affect dynamic interaction performance To reduce sag, most efficient measure improve moment of inertia conductor rail, which clamp wire. Six new types rail large moments are developed based on conventional rail. Then both static and analyses conducted investigate big inertia. rail’s 3D solid finite element model built using approach....

10.3390/en16041810 article EN cc-by Energies 2023-02-11

Soft and stretchable strain sensors are crucial for applications in human-machine interfaces, flexible robotics, electronic skin. Among these, capacitive widely used studied; however, they face challenges due to material structural constraints, such as low baseline capacitance susceptibility external interference, which result signal-to-noise ratios poor stability. To address these issues, we propose a U-shaped electrode sensor based on liquid metal elastomer (LME). By incorporating into the...

10.1021/acsami.4c19546 article EN ACS Applied Materials & Interfaces 2025-01-11

Overhead conductor rail (OCR) is an important power supply device in tunnel railway lines. The penalty method widely adopted to model the dynamic interaction behaviour of pantograph-OCR system (POCRs), while it difficult determine a proper contact stiffness value. This paper proposes three-dimensional formulation for POCRs based on Lagrange multiplier method. Accurate forces can be obtained easily by this without trouble determining stiffness. Contact force defined global coordinate as...

10.1080/00423114.2022.2112607 article EN Vehicle System Dynamics 2022-08-22

Overhead Conductor Rail (OCR) is a power supply device in tunnel railways. This paper aims to investigate the influence of train speed and support stiffness on pantograph-OCR system (POCRs) dynamic behaviour, propose improvement measures existing feeding accommodate higher speeds. Firstly, field test conducted measure equivalent supports currently utilised OCR system. The results are adopted modify model. Subsequently, lumped mass model pantograph considering interlocking joints developed....

10.1109/tte.2023.3345955 article EN IEEE Transactions on Transportation Electrification 2023-12-22

This article concerns a hybrid vehicle suspension system that can regenerate energy from vibrations. To further improve the performance of system, design energy-regenerative circuit is investigated. First, force tests linear motor used in were carried out, and key parameters obtained. Then, selection procedures protective resistance, inductance, initial terminal voltage super capacitor discussed. These aforementioned parameters’ values determined by considering impact on dynamic indexes...

10.1177/0036850419874999 article EN cc-by-nc Science Progress 2019-09-16

Overhead conductor rail (OCR) is widely used in tunnel railway lines to provide continuous energy for electric trains. Current studies mainly focus on the interaction of low-speed pantograph–OCR system (POCRs), whereas increase speed poses new challenges power supply locomotives. This article develops a mathematical model based absolute nodal coordinate formulation simulating dynamic behavior POCRs that operates at high speed, integrated with contact wire irregularities (CWIs). The...

10.1109/tim.2021.3135340 article EN IEEE Transactions on Instrumentation and Measurement 2021-12-13

Overhead conductor rail (OCR) serves as a crucial device employed in tunnels to power electric locomotives. The OCR is hung by supports mounted on the tunnel ceiling. Previously, support was usually considered linear spring when modelling OCR. stiffness and mass adopted model were imprecise, damping absent. It may be insufficient reproduce pantograph-OCR system (POCR) dynamic behaviour. This paper devoted improving accuracy of POCR makes it more realistic. Field tests are conducted order...

10.1080/00423114.2024.2393341 article EN Vehicle System Dynamics 2024-08-21

The road surface and the tread pattern structures directly affect wear performance of aircraft tire, especially for lateral sliding conditions. In this paper, tests block with different draft angles root radiuses, interfaces, slip were carried out, combined simulation, effects groove structure angle on mechanism analyzed. Results indicated that influences greater than radius; geometry decreased when increased in range 0° to 15°, but radius, each sample was similar a strip shape. A...

10.3390/polym13071143 article EN Polymers 2021-04-02

Abstract The solar heat reflective coating for sidewalks (SHRCS) is investigated in the present article. Compared with traffic lane, sidewalk has low requirements abrasion resistance but high human comfort. Therefore, cooling characteristics, anti-skid performance, resistance, and sports performance are chosen to assess SHRCS. SHRCS consists of three layers, bottom layer, elastic surface layer. materials layers were determined. Particularly, because layer composed resin, functional...

10.1520/jte20190075 article EN Journal of Testing and Evaluation 2019-08-28

This work presents the development of an optimal segmented-rotor switched reluctance machine (SSRM) for application as belt-driven starter/generators in hybrid electric vehicles. Different from conventional machines, stato

10.3233/jae-200013 article EN International Journal of Applied Electromagnetics and Mechanics 2020-04-21

Nonlinear characteristics of road mineral material and the fractal dimension grain size distribution, including D (fractal whole aggregate), Dc coarse Df fine aggregate) are used as indexes to describe characteristics. Additionally, formula gradation theory is put forward, correlation with performance mixture evaluated. Results show that aggregate 2.36 mm has a considerable influence on physical mechanical properties cold recycled pavement base foamed asphalt. The continuous-graded one...

10.1061/jhtrcq.0000512 article EN Journal of Highway and Transportation Research and Development (English Edition) 2016-09-01

In order to improve the adhesive and tractive performance of a wheeled tractor, test schemes for research on influencing factors are designed.The maximum tyre driving force has linear relation with vertical load wheel axis, deformation displacement increases increasing force. The can be improved increase decrease pressure, asphalt road is superior that soil road. Plough resistance, resistance torque slip coefficient plough depth. When depth increases, vibration amplitude decreases, frequency...

10.1504/ijhvs.2020.104425 article EN International Journal of Heavy Vehicle Systems 2020-01-01
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