Experimental Research on the Influence of Fatigue Load on the Vibration Damping Effect of Steel Spring Floating Slab Track

2022 ◽  
Author(s):  
Zhi-ping Zeng ◽  
Xu-dong Huang ◽  
Zhuang Li ◽  
Wei-dong Wang ◽  
Yu Yuan
Keyword(s):  
Experimental Research ◽  
Vibration Damping ◽  
Fatigue Load ◽  
Steel Spring ◽  
Slab Track ◽  
Damping Effect

scholarly journals An Experimental Research on the Vibration of Surface-Textured Journal Bearings

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Jian Dong ◽  
Xiaojing Wang ◽  
Jin Zhang ◽  
Xiaoqing Xiang ◽  
Zhou Nie ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Experimental Research ◽  
Load Capacity ◽  
Journal Bearings ◽  
Vibration Damping ◽  
Damping Effect ◽  
Acceleration Amplitude ◽  
Bearing Vibration ◽  
Partial Distribution ◽  
Microfabrication Techniques

Growing attention has been paid to surface texture owing to its significance in bearing lubrication, load capacity, and wear resistance. In this paper, research emphasis is placed on the influence of texture distributions on bearing vibration and rotor stability. With microfabrication techniques, three kinds of textures configurations (0–90° partial distribution, 0–160° partial distribution, and 0–160° full distribution) are designed and applied on the lower pad surface. The experiment of journal bearings is carried out. The experiment results show that there is a significant decrease in acceleration amplitude of the textured bearings compared to nontextured bearings. Furthermore, the 0–160° partially distributed journal bearings have better vibration damping effect than another two kinds of textures, which can be verified by the shaft center orbits, Fourier spectrums, and waterfall plots.

scholarly journals Vertical Dynamic Analysis of Ballastless Tracks on Train-Track- Bridge System

2020 ◽  
Vol 306 ◽  
pp. 02003
Author(s):  
Haoran Xie ◽  
Bin Yan ◽  
Jie Huang
Keyword(s):  
Track Structure ◽  
Vertical Acceleration ◽  
Train Track ◽  
Steel Spring ◽  
Slab Track ◽  
Ballastless Track ◽  
Track System ◽  
Train Speed ◽  
Track Bridge ◽  
Bridge System

In order to investigate the vertical dynamic response characteristics of train-track-bridge system on CWR (Continunously Welded Rail) under dynamic load of train on HSR (High-Speed Railway) bridge. Based on the principle of vehicle train-track-bridge coupling dynamics, taking the 32m simply supported bridge of a section of Zhengzhou-Xuzhou Passenger Dedicated Line as an example, the finite element software ANSYS and the dynamic analysis software SIMPACK are used for co-simulation, and bridge model of the steel spring floating slab track and the CRTSIII ballastless track (China Railway Track System) considering the shock absorbing steel spring, the limit barricade and the contact characteristics of track structure layers are established. On this basis, in order to study the dynamic response laws of the design of ballastless track structure parameters to the system when the train crosses the bridge and provide the basis for the design and construction, by studying the influence of the speed of train on the bridge, the damage of fasteners and the parameters of track structure on the train-track-bridge system, the displacement of rail, vertical vibration acceleration and wheel-rail force response performance are analyzed. Studies have shown that: At the train speed of 40 km/h, the displacement and acceleration of the rail and track slab in the CRTSIII ballastless track are smaller than the floating slab track structure, but the floating slab track structure has better vibration reduction performance for bridges. The acceleration of rail, track slab and bridge increases obviously with the increase of train speed, the rail structure has the largest increasement. Reducing the stiffness of fasteners could decrease the vertical acceleration response of the steel spring floating slab track system, the ability to absorb shock can be enhanceed by reducing the stiffness of the fastener appropriately. Increasing the density of the floating slab can increase the vertical acceleration of the floating slab and the bridge, thereby decreasing the vibration amplitude of the system.

Experimental research on vibration damping for flat airplane panels

1975 ◽  
Vol 7 (10) ◽  
pp. 1270-1275
Author(s):  
A. I. Kashchuk ◽  
V. V. Matveev
Keyword(s):  
Experimental Research ◽  
Vibration Damping

Dynamic characteristic difference of steel-spring floating slab track between single-carriage and multi-carriage models

2021 ◽  
pp. 095745652199986
Author(s):  
Wenhao Chang ◽  
Xiaopei Cai ◽  
Qihao Wang
Keyword(s):  
Coupling Effect ◽  
Three Dimensional ◽  
Coupled Model ◽  
Measured Data ◽  
Dynamic Responses ◽  
Theoretical Research ◽  
Maximum Displacement ◽  
Steel Spring ◽  
Slab Track ◽  
Computation Efficiency

The steel-spring floating slab track (SSFST) is a low-stiffness structure, sensitive to the vehicle loads. Due to the coupling effect of the superposition of adjacent bogies, it is difficult for conventional single-carriage models to meet the simulation requirements. To find a balance between computation efficiency and authenticity of analytical model results, the influence of carriage number on SSFST should be studied. Based on the finite element method and multi-body dynamics, a refined three-dimensional coupled model of multi-carriage-SSFST-tunnel was established. The difference in the dynamic response of the SSFST between single-carriage and multi-carriage models was analyzed and compared with the measured data. The field test results show that structural displacements and accelerations under the two-carriage model are much closer to the measured data. The dynamic model analysis results show that the maximum displacement of the rail and SSFST in the midspan of the slab increase by 0.48 mm and 0.34 mm under the multi-carriage model, and the vibration reduction effectiveness increases by 1.4–2.0 dB. Dynamic responses of the rail and SSFST show minor differences under the two-carriage and three-carriage models. The article is expected to provide a reference for the theoretical research, design, and layout optimization of subway SSFST.

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