Research on propagation laws of explosion shock wave inside metro station

Ma, Tianbao; Xu, Xiangzhao; Ning, Jianguo

doi:10.1016/j.jlp.2017.01.009

Cited by 16 publications

(10 citation statements)

References 21 publications

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“…In this method, the multimaterials interface is not determined, and the volume ratio of material calculated is considered as fuzzy weight coefficient, by which transport quantities is determined. 35 Meanwhile, the transport order is made by the priority weight of material transport. Fuzzy interface treatment methods can easily dispose mixture grids involving three or more materials in 3D case, and the computational cost is low.…”

Section: The Fuzzy Interface Treatment Methodsmentioning

confidence: 99%

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A three‐dimensional coupled Euler‐PIC method for penetration problems

Liu

et al. 2019

Numerical Meth Engineering

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Summary In this paper, a three‐dimensional coupled Euler‐PIC (particle in cell) method is proposed to solve the numerical analysis in which the Eulerian method cannot track the deformation process of material during the penetration problems. In the proposed method, the particles with a certain volume and influence domain are adopted to simulate real material flow, and the bidirectional mapping is achieved to physical quantities by the influence domain‐weighted average based on the topological relationship between grids and particles. For the complexity of parallel algorithm of hydrocode, the solution of data dependence and the realization of the parallel algorithm are presented. The numerical simulations of the typical penetration problems are compared with the corresponding experimental data to verify the effectiveness of the proposed method. Moreover, the numerical simulations of shaped charge and projectile penetration of reinforced concrete targets are carried out. The deformation process of reinforcing bars on the penetration process is obtained. Numerical results show that the coupled method has the advantages of both Lagrangian and Eulerian method and efficiently calculates the process of large deformation of the material.

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Section: The Fuzzy Interface Treatment Methodsmentioning

confidence: 99%

Section: Three‐dimensional Coupled Euler‐pic Methodsmentioning

confidence: 99%

A three‐dimensional coupled Euler‐PIC method for penetration problems

Liu

et al. 2019

Numerical Meth Engineering

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“…As far as the building structures are concerned, considering the multiple propagation patterns of the blast shock wave and the geometrical conditions of the underground transportation infrastructure, Pennetier et al [10] determined the position of this transition spherical-to-planar wave propagation in a tunnel using both numerical simulations and scale model tests and verified the dedicated law proposed by himself. By considering the effects of stairs, pillars, and wall materials, Ma et al [11] discussed the propagation law of the blast shock wave in a metro station, and estimated the harm on the human health. A few prevention measures against an explosion scenario to reduce the killing effect on the humans were proposed.…”

Section: Introductionmentioning

confidence: 99%

The research into the propagation law of the shock wave of a gas explosion inside a building

Lin

Yang

et al. 2021

Shock and Vibration

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Based on the dissipation rate conservation equations of turbulent kinetic energy in the k-ε turbulence model, a complicated three-dimensional finite element model of a kitchen filled with gas mixture is developed by using the open source field operation and manipulation (OpenFOAM). Two representative kitchens were used to investigate the propagation law of the shock wave of a gas explosion inside a building by considering the key characteristics of the blast shock wave. The influence of some crucial parameters, such as initial conditions and kitchen parameters, on the properties of the blast shock wave is investigated. The basic steps to predict the peak pressure of the blast shock wave are given in consideration of the initial condition and the kitchen whilst the injury effect of the blast shock wave on the humans and animals is evaluated. The research results indicate that the pressure time history and the peak pressure space distribution are greatly influenced by the kitchen design layout. The coupled interaction between the initial temperature and gas volume concentration, especially at the upper and lower explosion limits of the gas, significantly affects the peak pressure. The peak pressure varies significantly with the opening and the buffer; however, it has little relation with the width, length, and height of the kitchen. The proposed method can accurately and effectively predict the peak pressure of the blast shock wave inside buildings. In terms of the peak pressure space distribution of the explosion shock wave, the peak pressure is much higher than the threshold of the killing pressure, which is unsafe for the humans and animals in the building.

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“…In traffic hubs, such as metro and subway stations, public safety and health is a major concern in their operation management [ 1 , 2 ]. The specific issues include air quality [ 3 , 4 ], crowd management [ 5 , 6 , 7 ], and emergency evacuation in sudden events [ 8 ], such as fire disasters [ 9 , 10 ] and terrorist attacks [ 11 , 12 ]. Among these issues, both crowd management and emergency evacuation are closely associated with the pedestrian dynamics of crowds in the station, especially in big cities of China, where there is a large population and subways play a significant role in public transportation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ticket-Checking Failure on Dynamics of Pedestrians at Multi-Exit Inspection Points with Various Layouts

Meiying

Jin

Cheng

2019

IJERPH

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It is of great significance to understand the dynamics and risk level of pedestrians at the multi-exit inspection points, since they are the bottlenecks of pedestrian flow leaving public places, such as subway and railway stations. Microscopic simulations were carried out with a cellular automata model to investigate the effects of ticket-checking failure on pedestrian dynamics when passing through the multi-exit inspection points with parallel, convex and concave layouts. It was found that although ticket-checking failure could reduce the passing efficiency, it also lowers the competitive level between pedestrians and enhances passing safety in the range of medium and high pedestrian density. The competitive level decreases when increasing the probability of ticket-checking failure and the corresponding delay. The probability of ticket-checking failure and the corresponding delay have equivalent effects on passing efficiency and safety, and can be integrated as average delay. A fitted equation was proposed for the dependence of passing efficiency and safety on average delay. With the existence of ticket-checking failure in reality, the concave layout of the multi-exit inspection points gives rise to a much lower competitive level compared with the parallel and convex ones, which would enhance the safety of pedestrians at the exits.

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Research on propagation laws of explosion shock wave inside metro station

Cited by 16 publications

References 21 publications

A three‐dimensional coupled Euler‐PIC method for penetration problems

A three‐dimensional coupled Euler‐PIC method for penetration problems

The research into the propagation law of the shock wave of a gas explosion inside a building

Effects of Ticket-Checking Failure on Dynamics of Pedestrians at Multi-Exit Inspection Points with Various Layouts

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