Virtual fatigue test system and its key technologies for construction vehicles

2006 ◽  
Author(s):  
Sun Hongzhu ◽  
Shang Jianzhong ◽  
Cong Nan ◽  
Liang Keshan
Keyword(s):  
Fatigue Test ◽  
Test System ◽  
Key Technologies

scholarly journals Structural Improvement of the ω-Type High-Speed Rail Clip Based on a Study of Its Failure Mechanism

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Xiaogang Gao ◽  
Anbin Wang ◽  
Yu He ◽  
Xiaohan Gu
Keyword(s):  
Failure Mechanism ◽  
Fatigue Test ◽  
High Frequency ◽  
High Speed ◽  
Excitation Frequency ◽  
Test System ◽  
Vibration Measurement ◽  
High Speed Rail ◽  
Resonant Frequencies ◽  
Rail Wear

In the circumstances of high-speed railways, the wheel-rail vibration is significantly aggravated by polygonal wheel wear and rail corrugation, which subsequently leads to the wheel-rail interaction at higher frequencies and potential failure of the rail fastening. In this paper, a ω-type clip of the fastening in the CRH high-speed rail was used to investigate the failure mechanism. First, a dynamic wheel-rail coupling model and a finite element analysis of the rail clip were developed, from which the rail vibration frequency and modal frequencies of the clip with different installation torques were obtained. The experimental tests and modal simulation results were mutually verified. In addition, the real-time vibration measurement and the wheel-rail wear monitoring were carried out at a CRH high-speed railway site. It was found that the resonant frequencies of the ω-type clip in the installation condition coincided with the excitation frequencies of the wheel-rail interaction induced by wheel-rail wear. The high-frequency dynamic failure mechanism of a typical ω-type clip, W300-1, is put forward for the first time. Moreover, a high-frequency rail clip fatigue test system was designed and developed specifically for this study. The loading excitation frequency of the clip test used was set as 590 Hz, and the loading amplitude was 0.05 mm. After 125-minute operation of the test system, the clip was broken at the expected location predicted by the FEA model. The high-frequency fatigue test result further verified that the failure mechanism of the ω-type clip was due to the resonance of the clip with its excitation force from the wheel-rail interaction. Finally, the clip was then structurally improved taking into account the stiffness and mass, which led to its resonant frequencies shifting away from the high-frequency excitation range, hence avoiding resonance failure of the subject clip.

Research on hydrogen environment fatigue test system and correlative fatigue test of hydrogen storage vessel

2013 ◽  
Vol 19 (1) ◽  
pp. 88-94 ◽  
Author(s):  
Rong Li ◽  
Chuan-xiang Zheng ◽  
Bing-bing Chen ◽  
Wei-wei Zhou ◽  
Liang Wang
Keyword(s):  
Hydrogen Storage ◽  
Fatigue Test ◽  
Test System ◽  
Storage Vessel ◽  
Hydrogen Environment ◽  
Hydrogen Storage Vessel

Research on Real-Time Monitoring and Data Management of Hydraulic Test System Based on LabVIEW

2014 ◽  
Vol 496-500 ◽  
pp. 1715-1719
Author(s):  
Xing Liu ◽  
Zhi Jing Zhang ◽  
Shi Zhong Li ◽  
Xin Jin ◽  
Gao Yang Zhang
Keyword(s):  
Data Management ◽  
Real Time ◽  
Test System ◽  
Real Time Monitoring ◽  
Time Data ◽  
Hydraulic Test ◽  
Multiple Components ◽  
Key Technologies ◽  
Distance Data ◽  
Test Process

For real-time data management needs of multiple components, sets and workshops hydraulic experimental platforms, a new distributed system of real-time monitoring and data management based on LabVIEW was developed, by solving following key technologies: hydraulic data real-time monitoring and acquisition at remote distance, data management and reappearance, fault diagnosis expert system in test process. Through the experiment, monitoring in real-time and the operability of data management are confirmed.

Fatigue Test System for Accumulators

2013 ◽  
Vol 303-306 ◽  
pp. 1272-1275
Author(s):  
Jing Ping Leng ◽  
Jian Jin ◽  
Ke Li Xing
Keyword(s):  
Control System ◽  
Fatigue Test ◽  
Hydraulic System ◽  
Energy Recovery ◽  
Test System ◽  
Test Method ◽  
Hardware System ◽  
Test Requirements ◽  
Upper Computer ◽  
And Control

An energy recovery and high effective fatigue test system for accumulators has been developed through the improvement of test method JB-T 7037-2006 and test requirements JB-T 7036-2006 [1][2]. The test system contains hydraulic system and control system. The hardware system of control system is based on IPC as upper computer and PLC as lower computer, while the software system is based on Borland C++ Builder 6.0, which can realize collecting and saving the field data, drawing and saving testing curve, and generating export.

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