scholarly journals Vertical Vibration Analysis of Vehicle-Track-Subgrade Coupled System in High Speed Railway with Dynamic Flexibility Method

2017 ◽  
Vol 25 ◽  
pp. 291-300 ◽  
Author(s):  
Yang Xinwen ◽  
Gu Shaojie ◽  
Zhou Shunhua ◽  
Shu Yao ◽  
Ma Xiaoyun
Keyword(s):  
Vibration Analysis ◽  
High Speed ◽  
Coupled System ◽  
Vertical Vibration ◽  
High Speed Railway

Analysis of Dynamic Responses of Bridge-Subgrade Transition of High-Speed Railway

2011 ◽  
Vol 90-93 ◽  
pp. 189-196 ◽  
Author(s):  
Chang Wei Yang ◽  
Jian Jing Zhang ◽  
Chuan Bin Zhu
Keyword(s):  
High Speed ◽  
Deflection Angle ◽  
Coupled System ◽  
Dynamic Responses ◽  
Practical Situation ◽  
High Speed Railway ◽  
Ballastless Track ◽  
Track Dynamics ◽  
Coupling Dynamics ◽  
Analysis Models

Referred the vehicle-track coupling dynamics theory [1] and the vertical dynamic analysis models of Bridge-Subgrade transition developed by Zhai [2] ，Wang [3] and others [4]. This article takes account of the interaction between different structural layers in the subgrade system further by using the dynamic ballastless track model and finally establishes a space dynamic numerical model of the vehicle-track-subgrade coupled system. The dynamic response of the coupled system is analyzed when the speed of the train is 350km/h and the transition is filled with graded broken stones mixed with cement of 3%. Results show that the setting forms of Bridge-Subgrade transition have little effect on the dynamic responses, so designers can choose it on account of the practical situation. Due to the location away from abutment about 5m has greater deformation; the stiffness within 5m should be designed alone. Based on the study from vehicle-track dynamics, we suggest that the maximum allowable track deflection angle is 0.9‰ and K30190Mpa within 5m behind the abutment.

Analysis and Prediction of Ground Vibration Induced by High-Speed Train

2013 ◽  
Vol 779-780 ◽  
pp. 731-738 ◽  
Author(s):  
Ke Xin Zhang ◽  
Jian Wei Yao ◽  
Ze Ping Zhao
Keyword(s):  
Neural Network ◽  
Test Data ◽  
High Speed ◽  
Ground Vibration ◽  
Vertical Vibration ◽  
Orthogonal Test ◽  
Vibration Level ◽  
High Speed Train ◽  
High Speed Railway ◽  
Vibration Attenuation

The principal aim of this paper is to determine the reasonable design parameters of high-speed railway vibration attenuation. The orthogonal test method is used to design the test of ground vibration induced by high-speed train. Four main factors that impact the maximum ground vertical vibration level are selected, and different values are given to each factor, so 8 groups of combinations can be obtained by using orthogonal test technique. Each group test data of the maximum ground vertical vibration level can be obtained by conducting vehicle testing on-track. In this paper, the primary and secondary factors that impact the maximum ground vertical vibration level are determined by range analysis. Moreover, the neural network theory is used to establish a model of the ground vertical vibration level, and this model can be trained and verified by the test data. The impact factors can be predicted by the method of combining orthogonal test and neural network concerning the specified vibration limit, and the value of maximum ground vertical vibration level with the predicted factors meets the requirement of accuracy. The conclusions provide a valuable reference to the vibration attenuation design of the high-speed railway.

scholarly journals Cement-Modified Loess Base for Intercity Railways: Mechanical Strength and Influencing Factors Based on the Vertical Vibration Compaction Method

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3643
Author(s):  
Yingjun Jiang ◽  
Qilong Li ◽  
Yong Yi ◽  
Kejia Yuan ◽  
Changqing Deng ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
High Speed ◽  
Cement Content ◽  
Vertical Vibration ◽  
Initial Growth ◽  
High Speed Railway ◽  
Growth Properties ◽  
Vibration Compaction ◽  
Growth Equations ◽  
Compaction Method

Cement-modified loess has been used in the recent construction of an intercity high-speed railway in Xi’an, China. This paper studies the mechanical strength of cement-modified loess (CML) compacted by the vertical vibration compaction method (VVCM). First, the reliability of VVCM in compacting CML is evaluated, and then the effects of cement content, compaction coefficient, and curing time on the mechanical strength of CML are analyzed, establishing a strength prediction model. The results show that the correlation of mechanical strength between the CML specimens prepared by VVCM in the laboratory and the core specimens collected on site is as high as 83.8%. The mechanical strength of CML initially show linear growth with increasing cement content and compaction coefficient. The initial growth in CML mechanical strength is followed by a later period, with mechanical strength growth slowing after 28 days. The mechanical strength growth properties of the CML can be accurately predicted via established strength growth equations. The results of this study can guide the design and construction of CML subgrade.

scholarly journals Predict the Influence of Environmental Vibration from High-Speed Railway on Over-Track Buildings

2021 ◽  
Vol 13 (6) ◽  
pp. 3218
Author(s):  
Guoqing Di ◽  
Ziyin Xie ◽  
Jingyi Guo
Keyword(s):  
High Speed ◽  
Element Model ◽  
Vertical Vibration ◽  
High Speed Railway ◽  
Line Load ◽  
Railway Industry ◽  
Measurement Results ◽  
Environmental Vibration ◽  
Set Up ◽  
Improved Model

The vibration caused by railways is an environmental constraint in the development of over-track buildings. To study the influence of environmental vibration from the high-speed railway on over-track buildings, a finite element model including track, soil, and buildings was set up. Based on the vertical vibration acceleration sampled on the rail, the equivalent line load acting on rails vertically was obtained by a simplified model. On the basis of verifying the simulation model by measurement results, the vertical vibration induced by high-speed railways in over-track buildings was studied quantitatively. Through introducing correction terms relating to the thickness and height of the over-track platform, the story number, and the structure of the over-track building, an existing model released by the railway industry of China was improved. Compared with the existing model only being suitable for predicting vertical vibration of the first floor, the improved model can predict vertical vibration of different floors.

Vibration Analysis of Seated Passenger on High Speed Railway Vehicle by Multi-body Dynamics

2016 ◽  
Vol 2016 (0) ◽  
pp. G1800105
Author(s):  
Kou HISANO ◽  
Takayoshi KAMADA ◽  
Ryohei SHIMAMUNE ◽  
Shinichi HASEGAWA ◽  
Michiko TANAKA
Keyword(s):  
Vibration Analysis ◽  
High Speed ◽  
Railway Vehicle ◽  
High Speed Railway ◽  
Body Dynamics ◽  
Multi Body
Sign in / Sign up

Export Citation Format

Share Document