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19 results on '"Xing, Huadao"'

9. Influence of impact load on permeability of saturated calcareous sand.

Author

Li, Xiaodong, Qiu, Yanyu, Li, Hujun, Xu, Guangan, Xing, Huadao, Wang, Mingyang, and Shi, Jie

Subjects
SPECIFIC gravity, PERMEABILITY, PARTICLE size distribution, MARINE sediments, SAND
Abstract

Due to the characteristics of geographical environment and many complicated factors, the seepage properties of calcareous sand are quite different from those of common continental and marine sediments. To investigate the change of permeability coefficient of calcareous sand under external load, a seepage test device equipped with an impact loading system was developed. The effects of particle size distribution, initial relative density and impact load on the permeability of calcareous sand were investigated with this device. The results showed that the larger the curvature coefficient and uniformity coefficient, the smaller the initial relative density lead to the greater the permeability coefficient of calcareous sand and the more obvious the change of permeability coefficient before and after loading. The permeability change of calcareous sand under impact load was greater than that of quartz sand. [ABSTRACT FROM AUTHOR]

Published
2024
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15. A prediction model for debris scattering in vented gas deflagration

Author

Song Sun, Xing Huadao, Yanyu Qiu, Kanghua Gao, and Wang Mingyang

Subjects
021110 strategic, defence & security studies, Environmental Engineering, Explosive material, Scattering, General Chemical Engineering, Monte Carlo method, 0211 other engineering and technologies, 02 engineering and technology, Mechanics, 010501 environmental sciences, 01 natural sciences, Debris, Plastic hinge, Trajectory, Range (statistics), Environmental Chemistry, Deflagration, Environmental science, Astrophysics::Earth and Planetary Astrophysics, Safety, Risk, Reliability and Quality, 0105 earth and related environmental sciences
Abstract

As one of the main modes of damage caused by gas explosions in industrial production, the debris generated by the explosion threatens the safety of surrounding personnel and buildings. By means of experimental research and theoretical modelling, the debris generated by the vented component was experimentally studied, and a predictive model of the scattering range of explosion-induced debris was proposed. Through experiments using a self-designed explosion test apparatus, it is found that the gas explosion exerts a quasi-static pressure, and the vented plate is cracked by the plastic hinge under deflagration load. According to the force and the motion equation of the debris, the predictive model of the debris trajectory was proposed by differentiating the scattering process. The distribution of random variables in the model was determined by experimental data, and the scattering range of explosive debris was obtained using the Monte Carlo method. By comparing the calculated results with experimental data gathered under three typical conditions, the model values were seen to agree with the experimental values, and this model can predict the scattering range of debris. The proposed prediction model for debris scattering can provide a reference for the design of works used to protect against debris damage and subsequent domino effect.

Published
2020
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