scholarly journals Dynamic Simulation Method of High-Speed Railway Engineering Construction Processes Based on Virtual Geographic Environment

2020 ◽  
Vol 9 (5) ◽  
pp. 292
Author(s):  
Xinwen Ning ◽  
Qing Zhu ◽  
Heng Zhang ◽  
Changjin Wang ◽  
Zujie Han ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
High Speed ◽  
Simulation Method ◽  
3D Models ◽  
Scientific Basis ◽  
Construction Equipment ◽  
High Speed Railway ◽  
Engineering Construction ◽  
Virtual Geographic Environment ◽  
Geographic Environment

The spatial conflicts in the construction of high-speed railways not only reduce project efficiency, but also lead to serious accidents. To address these key issues, this paper presents a dynamic simulation method for constructions processes based on a virtual geographic environment. This approach can facilitate the identification of conflicts in the construction scheme through accurately expressing and analysing the intricate spatio-temporal relations among railway facility components, construction equipment and the surrounding environment. First, a high-precision virtual geographic scene in which the construction process and methods can be visualized and modelled intuitively is established with terrain, imagery, and engineering 3D models. Then, the overall construction processes can be accurately simulated by a sequential display of the railway components and the behaviour of construction equipment. To simulate the behaviour of construction equipment, the linkage relations between each joint of construction machinery are accurately modelled and animation control parameters are extracted. Finally, a construction simulation of a high-speed railway bridge was performed, and the experimental results show that the proposed method can provide a scientific basis for the optimization of complex engineering construction schemes, safety hazard assessments, and related full life cycle tasks.

scholarly journals Research on Observation of Settlement Deformation of Zhengzhou-Jinan High-speed Railway and Information Platform of Observation Data

2021 ◽  
Vol 283 ◽  
pp. 02012
Author(s):  
Ni Xiuyong
Keyword(s):  
High Speed ◽  
Future Research ◽  
Observation Data ◽  
High Speed Railway ◽  
Information Platform ◽  
Engineering Construction ◽  
Data Support ◽  
The Future

In order to provide data support for engineering construction, this paper proposes to study the construction of information platform of settlement deformation observation data. In this paper, the information platform for observation data is established based on the settlement deformation data of Zhengzhou-Jinan high-speed railway. The results show that the settlement deformation observation platform in this paper can effectively integrate the data and ensure the accuracy of the data. This paper sets an example for the future research on the construction of information platform of high-speed railway settlement.

scholarly journals Study on the Performance of High-Speed Rail Damage of Four Different Materials

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Jiajie Hu ◽  
Wen Zhong ◽  
Qiyue Liu
Keyword(s):  
Plastic Deformation ◽  
High Speed ◽  
Simulation Method ◽  
Contact Condition ◽  
Wear Volume ◽  
Experimental Conditions ◽  
High Speed Rail ◽  
Contact Conditions ◽  
High Speed Railway ◽  
Deformation Layer

For four types of railway rails, corresponding rolling tests have been executed by using the JD-1 wheel/rail simulation device based on the Hertz simulation method, which can ensure the reciprocal contact condition between simulation rail and wheel under experimental conditions approximate to practical contact conditions. The results indicate that, for the rail material which has a higher hardness, the wear volume was less and the plastic deformation layer was thinner after the rolling test, but the crack propagation was more significant and the fatigue damage was severer, showing that its wear resistance was better. The analysis shows that the fatigue resistance of U71Mn rail was better, and considering fatigue is the main failure type for high-speed rail, so it is more suited to the high-speed railway.

A Design of Roadheader Simulation Training System

2014 ◽  
Vol 1044-1045 ◽  
pp. 968-971
Author(s):  
Da Hu Wang ◽  
Wen Bo Chen ◽  
Yan Nan Shi
Keyword(s):  
Dynamic Simulation ◽  
Coal Mine ◽  
Simulation Training ◽  
Simulation Method ◽  
3D Models ◽  
Training System ◽  
Motion Simulation ◽  
Training Systems ◽  
Physics Engine

Because of the lacking of realistic, the operators who use the existing simulation training systems cannot immerse into it. This paper presents a method that taking the EBH-120 roadheader as an example to solve the problem, with the method a motion simulation method based on physics engine is figured out. It uses 3ds Max for making 3D models and Newton physics engine for dynamic simulation. The result showed the roadheader simulation training system with real physics properties was developed based on Quest3D and Newton physics engine; it can improve the immersion of this system, and increase the deficiency of coal mine training field.

scholarly journals Experimental Study of the Dynamic Characteristics of a New Antidrainage Subgrade Structure for High-Speed Railways in Diatomaceous Earth Areas

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 532
Author(s):  
Qian Su ◽  
Zhixing Deng ◽  
Xun Wang ◽  
Wenyi Jia ◽  
Yunbin Niu
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Diatomaceous Earth ◽  
Water Resistance ◽  
Resistance Index ◽  
Local Environment ◽  
Vibration Acceleration ◽  
High Speed Railway ◽  
Engineering Construction ◽  
Field Excitation

The experience needed to carry out engineering and construction in diatomaceous earth areas is currently lacking. This project studies the new Hang Shaotai high-speed railway passing through a diatomaceous earth area in Shengzhou, Zhejiang Province, and analyzes the hydrological and mechanical properties of diatomaceous earth on the basis of a field survey and laboratory. Moreover, a new antidrainage subgrade structure was proposed to address the rainy local environment, and field excitation tests were performed to verify the antidrainage performance and stability of the new subgrade structure. Finally, the dynamic characteristics and deformation of the diatomaceous earth roadbed were examined. The hydrophysical properties of diatomaceous earth in the area are extremely poor, and the disintegration resistance index ranges from 3.1% to 9.0%. The antidrainage subgrade structure has good water resistance and stability under dynamic loading while submerged in water. After 700,000 loading cycles, the dynamic stress and vibration acceleration of the surface of the subgrade bed stabilized at approximately 6.37 kPa and 0.94 m/s2, respectively. When the number of excitations reached 2 million, the settlement of the diatomaceous earth foundation was 0.08 mm, and there was basically negligible postwork settlement of the diatomaceous earth foundation. These results provide new insights for engineering construction in diatomaceous earth areas.

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