Hechao Zhou
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View article: Fault Diagnosis of Axle Box Bearing with Acoustic Signal Based on Chirplet Transform and Support Vector Machine
Fault Diagnosis of Axle Box Bearing with Acoustic Signal Based on Chirplet Transform and Support Vector Machine Open
Acoustic fault diagnosis technology equipment is non-contact, and the acoustic signal is easy to access. However, it is difficult to extract the feature information of the acoustic signal with low signal-to-noise ratio (SNR). In this paper…
View article: Analysis of Tire‐Pavement Contact Morphology Characteristics during the Virtual Track Train Maneuvering
Analysis of Tire‐Pavement Contact Morphology Characteristics during the Virtual Track Train Maneuvering Open
The tire‐pavement contact morphology during the virtual track train maneuvering has an essential function in assessing vehicle performance and pavement damage. The longitudinal tread tire and viscoelastic asphalt pavement were developed ba…
View article: Research on Adaptive Steering Control of Independent Rotating Wheelset
Research on Adaptive Steering Control of Independent Rotating Wheelset Open
The traditional wheelset has lost the ability of automatic reset due to the independent rotation of the left and right wheels.An adaptive steering control method is presented for independent rotating wheelset vehicles to improve steering a…
View article: Dynamics of the differential coupling independently rotating wheels for railway vehicle
Dynamics of the differential coupling independently rotating wheels for railway vehicle Open
In this investigation, the planetary gear differential is intended to the independently rotating wheels as a passive control device of the left and right wheels. Based on dynamics and kinematics analysis of the railway vehicle system and d…
View article: Wheel Wear of Intercity EMU at Non-equilibrium Speed on Curves
Wheel Wear of Intercity EMU at Non-equilibrium Speed on Curves Open
摘要: 通过调研发现运行于某线的CRH6A城际动车组车轮存在磨耗异常现象和较多以非均衡速度通过曲线的情况。基于运行线路曲线半径及列车运行速度数据,通过建立车辆动力学计算模型和车轮磨耗预测模型研究曲线上列车运行速度对车轮磨耗的影响。结果表明,该城际动车线曲线半径主要为500~3 500 m,且运行于该线的城际动车组基本均以低于均衡速度的状态通过曲线。在均衡速度以下70%至均衡速度以上10%的范围内通过半径500 m曲线,车轮整体磨耗受速度影响较小。在1 500 m及以上半径曲…
View article: Study on the Vertical Buckling of Railway Vehicle's Anti-climber
Study on the Vertical Buckling of Railway Vehicle's Anti-climber Open
摘要: 为抑制列车碰撞时的相互爬车程度,列车端部均安装吸能与防爬功能一体的吸能式防爬器。然而,列车碰撞事故调查发现吸能式防爬器有时会出现明显的垂向屈曲,导致其碰撞吸能和防爬能力大幅度降低。为此,提出多刚体动力学和有限元理论相结合的仿真分析方法,再现吸能式防爬器垂向屈曲失效的动态过程。此外,仿真计算表明随着碰撞列车之间差异加大,相邻车辆爬车速度明显增加,其最大爬车速度可以达到1.5 m/s。与此同时,吸能式防爬器发生明显的垂向屈曲,导致相互啮合的防爬齿发生脱离、失去防爬约束能…
View article: Research on the city tram collision at a level crossing
Research on the city tram collision at a level crossing Open
The collision simulation between a city tram and a car at a level crossing is carried out based on the multi-body dynamics. Compared with the finite element method, this method has an obvious advantage of fast computation speed, so that it…
View article: Dynamic simulation of train driver under secondary impact
Dynamic simulation of train driver under secondary impact Open
In this paper, a passenger train with detailed cabin structural has been established based on the finite element method. Simulation results indicate that the train driver injury by the triangular impact pulse in US 49CFR is more seriously …
View article: Dynamic Performance of the Freight Vehicle with Orientation Resistance Controller
Dynamic Performance of the Freight Vehicle with Orientation Resistance Controller Open
The dynamic performance of the empty case is worse than the loaded case to the railway freight vehicle in general.The gap damping idea is referred to be used to improve the ride index of the three piece mid-cross bogie vehicle when the fri…