Jian Han
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View article: Comprehensive vibration and noise reduction characteristics of particle damping fastener systems using in prefabricated assembled ballastless track
Comprehensive vibration and noise reduction characteristics of particle damping fastener systems using in prefabricated assembled ballastless track Open
The ballastless track structure is the main structure of urban rail transit, and the ballastless track has the advantages of high smoothness, high stability, and less maintenance. At present, urban rail transit requires high smoothness and…
View article: Optimization and Efficiency Analysis of Lunar Water Vapor Condensation Collection Structure Devices
Optimization and Efficiency Analysis of Lunar Water Vapor Condensation Collection Structure Devices Open
Aimed at the technical challenge of low water vapor collection efficiency in the in-situ thermal extraction of lunar polar water ice, this study, based on the heat and mass transfer characteristics of frost layer porous media, proposes a s…
View article: Study on the non-linear vibration and impact characteristics of composite structure of embedded track
Study on the non-linear vibration and impact characteristics of composite structure of embedded track Open
The embedded track composite structure, composed of various polymer composites, is a specialized type of vibration- and noise-reducing track whose parameters and composition critically influence the vibration and impact dynamics experience…
View article: Efficient Technical Term Translation: A Knowledge Distillation Approach for Parenthetical Terminology Translation
Efficient Technical Term Translation: A Knowledge Distillation Approach for Parenthetical Terminology Translation Open
This paper addresses the challenge of accurately translating technical terms, which are crucial for clear communication in specialized fields. We introduce the Parenthetical Terminology Translation (PTT) task, designed to mitigate potentia…
View article: Investigation on influencing factors of wheel polygonization of a plateau high-speed EMU train
Investigation on influencing factors of wheel polygonization of a plateau high-speed EMU train Open
Purpose This study aims to investigate the cause of high-order wheel polygonization in a plateau high-speed electric multiple unit (EMU) train. Design/methodology/approach A series of field tests were conducted to measure the vibration acc…
View article: Study on stiffness matching strategy of longitudinal sleeper and fastener to reduce tunnel wall vibration
Study on stiffness matching strategy of longitudinal sleeper and fastener to reduce tunnel wall vibration Open
With the increase of the running time of the subway system, long-term use will lead to the reduction of damping, the change of the operating state of the wheels and the track, and the effect of vibration damping measures will gradually wea…
View article: Analysis of uncertainty and variation in underground train-induced vibration based on measured data
Analysis of uncertainty and variation in underground train-induced vibration based on measured data Open
Ground-borne noise and vibration from metro trains can cause human distress/annoyance, affect the growth of animals and plants, and also negatively affect real estate property values. Before construction, the common prediction methods for …
View article: Speed Limit of Linear Induction Motor Subway Trains Running through 65 m Radius Curves on Yard Line
Speed Limit of Linear Induction Motor Subway Trains Running through 65 m Radius Curves on Yard Line Open
Linear induction motor (LIM) subway yard line often have very-small-radius curves and small turnouts with “S”-shaped curves in the middle. The lateral stability of the train is low, and wheel-climb (slipway) derailments often occur at a sp…
View article: Rail Roughness Acceptance Criterion Based on Metro Interior Noise
Rail Roughness Acceptance Criterion Based on Metro Interior Noise Open
Severe rail roughness leads to a series of problems in metro systems, particularly the vehicle noise problem. To ensure a better acoustic environment, rail roughness control is therefore one of the main concerns for the metro operators. Bu…
View article: Transfer Path Contribution to Floor Vibration of Metro Vehicles Based on Operational Transfer Path Analysis Method
Transfer Path Contribution to Floor Vibration of Metro Vehicles Based on Operational Transfer Path Analysis Method Open
Operational transfer path analysis (OTPA) is an advanced vibration and noise transfer path identification and contribution evaluation method. However, the application of OTPA to rail transit vehicles considers only the excitation amplitude…
View article: Subway Embedded Track Geometric Irregularity Safety Limits
Subway Embedded Track Geometric Irregularity Safety Limits Open
A coupling dynamic model of a subway train and an embedded track is established to study the safety limits of track irregularities. The simulated vehicle system was a 74-degrees of freedom multi-rigid body model, and the rail was a Timoshe…
View article: Rail Roughness Acceptance Criterion Based on Interior Noise
Rail Roughness Acceptance Criterion Based on Interior Noise Open
Severe rail roughness leads to a series of problems in metro systems, particularly the vehicle noise problem. To ensure a better acoustic environment, rail roughness control is therefore one of the main concerns for the metro operators. Bu…
View article: Study on the Influence of Rail Vibration Absorber on Wheel/Rail Vibration and Noise
Study on the Influence of Rail Vibration Absorber on Wheel/Rail Vibration and Noise Open
摘要: 针对有限截取长度轨道结构边界反射波干扰的问题,基于轨道的周期结构特性,采用子结构迭代法建立轨道有限元模型,研究了不同钢轨动力吸振器安装位置、动力吸振器橡胶结构在钢轨上的覆盖面积以及橡胶结构参数对轮轨振动噪声的影响,并对钢轨动力吸振器橡胶结构黏贴失效情况下的降噪性能进行分析。结果显示,轨腰位置安装钢轨动力吸振器对轮轨振动噪声降低效果较好,降噪量为3.2 dBA。采用全包钢轨动力吸振器(橡胶结构覆盖轨头下部,轨腰和轨脚)能够在一定程度上衰减钢轨和钢轨动力吸振器质量块的振…
View article: Key Factors of the Initiation and Development of Polygonal Wear in the Wheels of a High-Speed Train
Key Factors of the Initiation and Development of Polygonal Wear in the Wheels of a High-Speed Train Open
The polygonal wear of train wheels occurs commonly in rail transport and increases the wheel–rail interaction force dramatically and has a bad effect on the safety and comfort of the train. The mechanism of polygonal wear needs to be studi…
View article: Characteristics of Vibration and Sound Radiation of Metro Resilient Wheel
Characteristics of Vibration and Sound Radiation of Metro Resilient Wheel Open
Resilient wheels are extensively used in urban rail transit, especially for tramway systems, owing to its advantages in noise reduction. A new type of resilient wheel for a metro is designed, and its characteristics of vibration and sound …
View article: Effect of cement asphalt mortar damage location on dynamic behavior of high-speed track
Effect of cement asphalt mortar damage location on dynamic behavior of high-speed track Open
One of the problems with high-speed tracks in service is the damage of their cement asphalt mortar layer. The development of cement asphalt mortar damage can lead to gradually failure of the slab supporting. In fact, the cement asphalt mor…
View article: Effect of Control Measures on Wheel/Rail Noise When the Vehicle Curves
Effect of Control Measures on Wheel/Rail Noise When the Vehicle Curves Open
This paper developed a time domain simplified model to study the effect of control measures on wheel/rail noise when the vehicle curves. The time domain model consists of two parts, one being a vehicle-track coupling dynamic model for whee…
View article: Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics
Effect of softening of cement asphalt mortar on vehicle operation safety and track dynamics Open
Cement asphalt mortar (CAM) softening is a common phenomenon that results from ageing and rain soaking when a high-speed railway is in service. CAM softening seriously affects vehicle operation safety and track dynamics. In this paper, a 3…