Discrete element modeling of a cross-river tunnel under subway train operation during peak and off-peak periods

Zhang, Zhihua; Zhang, Xiedong; Cui, Yifei; Qiu, Hongsheng

doi:10.1007/s12517-019-4279-2

Cited by 9 publications

(5 citation statements)

References 44 publications

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“…is method can be used in geotechnical engineering [25,[34][35][36], load transfer mechanism [31], soil failure [37,38], failure mechanism [39], micromechanisms [30], high-speed train operation [9], metro train operation [40,41], fluidization [27], particle migration [42], strain softening [43], and filling capacity of concrete [44].…”

Section: Discrete Element Methodmentioning

confidence: 99%

Dynamic Characteristics of the Surrounding Soil during the Vibrational Pulling Process of a Pile Based on DEM

Sun

Zhang

Yang

et al. 2020

Shock and Vibration

Self Cite

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When bridge construction has been completed, the temporary support system, such as a steel-pipe pile, is dismantled, and problems that are related to the steel-pipe piles pulling from the strata are encountered. It is difficult to measure the dynamic characteristics of the surroundings during the deep pile-pulling process. A numerical model of the pulling pile is established by using the discrete element method (DEM). A sinusoidal dynamic load is executed on the pile with various vibrational frequencies. The stress, bond, coordination number, porosity, and velocity field distribution of the surrounding soil during the pile-pulling process are studied. The results demonstrate that, during the pile-pulling process, the shearing state of the surrounding soil depends on the position of the pile. The number and area of bond fractures gradually increase, the coordination number decreases, and the porosity gradually increases when the pile-pulling distance increases. Under a vibrational load, the area that corresponds to particles with large velocity and displacement expands with the increase of the vibrational frequency. The major influence zone of the pile pulling on both sides is concentrated within 6dpile, which can be used to evaluate the safety of the existing bridge nearby during pile pulling.

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Section: Discrete Element Methodmentioning

confidence: 99%

Dynamic Characteristics of the Surrounding Soil during the Vibrational Pulling Process of a Pile Based on DEM

Sun

Zhang

Yang

et al. 2020

Shock and Vibration

Self Cite

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“…Assuming that these energy suppliers provide the same type of energy and have the same production cost, the cost of producing 1 unit of renewable energy is v i . The j(j∈{1,2,⋯,n i }) renewable energy supplier knows the market demand curve of energy, and knows What strategies will other energy business competitors adopt [31]. In this case, you need to set the amount of stored energy to maximize your profit.…”

Section: A Virtualized Edge Computing System Modelmentioning

confidence: 99%

Analysis of the Effect of Subway Operation on the Vibration of Buildings Along the Line Based on Edge Computing

Zhang

Yuan

2020

IEEE Access

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The vibration effect of subway train operation on the adjacent building structure has become one of the outstanding problems in the development of urban underground rail transit and the construction facilities along the line. The new technology of intelligent interconnection provides new ideas for the analysis of the impact of subway vibration, but the network edge side faces many challenges such as connecting massive heterogeneous devices and real-time business. Therefore, in this paper, based on the needs of actual projects, on the basis of edge computing technology, through the field measurement and numerical simulation methods, the typical subway adjacent building structure is affected by the vibration of subway train operation. Edge computing solves the urgent need to realize the function of cloud computing at the edge equipment of massive subway networks, and provides active support for the analysis of the vibration impact of subway train operations on adjacent building structures. Practical case analysis and vibration impact assessment illustrate the superiority of the realization of edge analysis-based metro operation on the vibration analysis of buildings along the line. This method can provide scientific reference and basis for the exhibition of modern subway technology.

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“…In different application fields, the methods of system improvement are also flexible. The complex discrete dynamic model with different improved technologies is widely used in the transportation industry, the aerospace industry, the medical service industry, and other fields [ 2 ]. In the field of the medical industry, because the population is huge, a large data system is required.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Public Health Service Platform System Based on the Big Data-Driven System

Tian

2022

Computational Intelligence and Neuroscience

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At present, complex discrete dynamic systems are widely used in the field of medicine. The control system in the complex discrete dynamic model is gradually transformed into intelligent control. It has become the main research direction of researchers to improve the medical platform system by adding different modeling strategies. The traditional discrete modeling technology can only be used as the knowledge content of students’ textbooks because it can no longer meet the needs of the development of human society. In order to improve the application of a discrete system in the public platform, this paper studies the improvement of the public health service platform system based on the complex discrete dynamic system. Firstly, a time-driven control strategy is proposed to study the output feedback control with random sampling in the platform. Then, the stability of random parameters and the addition of dynamic scheduling strategies are further studied. Compared with the traditional system, the optimized system greatly strengthens the data transmission problem of input and output channels. The results show that by improving the performance of the public health service platform system, the probability of problems in the process of data transmission is greatly reduced. After adding controllable and observable performance to the system, the stability of the whole system is further improved. The improved public health service platform system studied in this paper can store and transmit a large number of user data in the network environment, automatically maintaining the stability of the system and has a good social application value.

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Discrete element modeling of a cross-river tunnel under subway train operation during peak and off-peak periods

Cited by 9 publications

References 44 publications

Dynamic Characteristics of the Surrounding Soil during the Vibrational Pulling Process of a Pile Based on DEM

Dynamic Characteristics of the Surrounding Soil during the Vibrational Pulling Process of a Pile Based on DEM

Analysis of the Effect of Subway Operation on the Vibration of Buildings Along the Line Based on Edge Computing

Improvement of the Public Health Service Platform System Based on the Big Data-Driven System

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