Simulation Analysis of Information Control for "723" Wenzhou High-speed Railway Accident in China Based on System Dynamics

2012 ◽  
Author(s):  
Qian Wu ◽  
Kefan Xie
Keyword(s):  
System Dynamics ◽  
High Speed ◽  
Simulation Analysis ◽  
Information Control ◽  
High Speed Railway

scholarly journals Research on multi-stage heating method of high-speed railway emergency traction battery system based on flat heat pipe

2020 ◽  
pp. 172-172
Author(s):  
Xudong Sun ◽  
Xiaoming Xu ◽  
Wei Tang ◽  
Huifen Jin ◽  
Hua Ding
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Heating System ◽  
Heating Time ◽  
Transfer Model ◽  
Generation Model ◽  
Battery System ◽  
High Speed Railway ◽  
Heating Method ◽  
Multi Stage

High-speed rail vehicles need to start the emergency traction battery system in an emergency. In order to ensure that the emergency traction battery system can be quickly started in cold conditions and ensure that the high-speed railway has sufficient mileage, this paper proposes a multi-stage heating method based on flat heat pipes. The thermodynamic parameters of the power battery are obtained by simulation analysis and experimental verification. According to the thermodynamic model, the heat generation model and coupled heat transfer model of the battery are established. Different heating powers are assigned to different heating points and the total heating power is kept constant. Through the analysis results, the multi-stage heating device of the emergency traction battery system can effectively reduce the heating time under cold conditions and the temperature difference between the battery system modules. This paper can provide reference to the design of the battery pack and the matching of the heating system.

Composite Foundation on Bearing Characteristics and Simulation Analysis CFG Pile for the High Speed Railway

2011 ◽  
Vol 71-78 ◽  
pp. 3827-3831
Author(s):  
A Lan Jiang ◽  
Mei Xia Wang
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Coupling Effect ◽  
Rapid Development ◽  
Composite Foundation ◽  
Treatment Technology ◽  
High Speed Railway ◽  
Cfg Pile Composite Foundation ◽  
Sand And Gravel ◽  
Cfg Pile

With the rapid development of high-speed railway in soft foundation, foundation treatment technology has become mature, the most outstanding is CFG pile composite foundation technique. CFG pile composite foundation is made of cement fly ash gravel pile(CFG pile), pile of soil and sandstone , between sand and gravel several problems such as the medium material composition together constitute layer. It has high bearing of capacity, convenient, low costing, strong adaptability and quality control easier.So it is widely applied and promoted. Under static and dynamic loads, the relations of the high-speed railway CFG pile composite foundation is very complex. In order to further understand the intensity of pile-net structure subgrade stability and deformation, pile , requirements of the high-speed railway roadbed ,it needs to do pile-net structure parameter sensitivity analysis. According to high-speed railway CFG pile composite foundation , the numerical analysis can well solve the coupling effect of piles and soil. So, this paper adopts FLAC3D finite difference software is simulated and analyzed.

scholarly journals Game Modelling and Strategy Research on the System Dynamics–based Quadruplicate Evolution for High–speed Railway Operational Safety Supervision System

2019 ◽  
Vol 11 (5) ◽  
pp. 1300 ◽  
Author(s):  
Kehong Li ◽  
Wenke Wang ◽  
Yadong Zhang ◽  
Tao Zheng ◽  
Jin Guo
Keyword(s):  
System Dynamics ◽  
High Speed ◽  
Evolutionary Game ◽  
Dynamics Simulation ◽  
Multiple Agents ◽  
Strategy Research ◽  
Safety Level ◽  
High Speed Railway ◽  
Supervision System ◽  
Safety Investment

In view of the entrusted transportation management model (ETMM) of China’s high–speed railway (HSR), the supervision strategy of an HSR company for its multiple agents plays a very important role in ensuring the safety and sustainable development of HSR. Due to the existence of multiple agents in ETMM, the supervision strategy for these agents is usually difficult to formulate. In this study, a quadruplicate HSR safety supervision system evolutionary game model composed of an HSR company and three agents was established through the analysis of the complex game relationship existing in the system. The behavioral characteristics and the steady state of decision–making of all stakeholders involved in the system are proved by evolutionary game theory and system dynamics simulation. The results show that there will be long–term fluctuations in the strategies selected by the four stakeholders in the static reward–penalty control scenario (RPCS), which indicates that an evolutionary stable strategy does not exist. With increases in the reward–penalty coefficient, the fluctuations are intensified. Therefore, the dynamic RPCS was proposed to control the fluctuations, and the simulation was repeated. The results show that the fluctuations can be effectively restrained by adopting the dynamic RPCS, but if the coefficients are the same, the static RPCS is better than the dynamic RPCS for increasing the safety investment rate of the three agents. This demonstrates that the HSR company should apply these two control scenarios flexibly according to the actual situation when formulating a supervision strategy in order to effectively control and enhance the safety level of HSR operations when multiple agents are involved.

Sign in / Sign up

Export Citation Format

Share Document