Abstract
Controlling the hazards to facilities caused by detonation waves is a high priority in engineering design. To protect an underground facility, soil can reduce the destructive effects of detonation waves. Soil dynamic characteristics and the area of the destructive zone are affected by shock wave energy. The material at ground zero is impacted by high-intensity stress and forms a crater. To ensure the safety of the facility, the protective soil layers must be sufficiently thick. Therefore, the purpose of this study was to analyze the destructive effects that caused the deformation and destruction of an external protective soil layer. The results of the explosion experiments and the numerical simulation analysis were compared to explore the dynamic characteristics of the soil affected by the shock wave and the crater effects of on-ground explosions. The analysis model adopted an 8-node hexahedral element to create a three-dimensional solid structure model of the fluid-solid interaction. The material failure analysis demonstrated that the detonation wave destabilized the interior of the soil body, and the nearby high-intensity stress was the key factor for material failure. The results can serve as a reference for the design of soil-covering layers that provide explosion hazard control.
Highlights
Structural protection engineering is the essential design principle for vital industries and national defense infrastructure
Before designing military and industrial pipelines, it is necessary to calculate the area and extent of the explosion destruction effect to calculate the thickness of the protective layer. e detonation wave is transmitted outward through the medium; the generated stress wave induces particle vibration in the medium and affects the internal stability of the material [1,2,3,4]. e explosion shock wave compresses the ground and pushes soil, forming a crater. e extent of destruction and the affected range are determined by the energy of the shock wave and the material characteristics of the transmission medium [5]
Wang et al [10] studied the seismic waves of a low-altitude explosion that were primarily generated by a shock wave in the air; the seismic waves were transmitted in the form of shock waves and converted into elastic seismic waves, inducing particle vibration on the surface
Summary
Structural protection engineering is the essential design principle for vital industries and national defense infrastructure. Wang [11] applied a numerical analysis model of explosion pressure verification to an explosion experiment to prove that the LS-DYNA finite element program could effectively analyze the transmission behavior of a detonation wave during an on-ground explosion. An on-ground explosion induces high temperature, high pressure, and detonation waves on the soil and causes soil compression, deformation, and the throwing phenomenon, resulting in crater [13]. The explosion shock wave affects the stability of the material and causes different degrees of crater destruction on target objects [17]. Exploring the transmission of shock waves in the soil, this study determined the optimal benefits of the parameters of soil element failure caused by contact explosions to establish the foundation of a dynamic numerical model. Numerical analysis based on the finite element method was conducted using hydrodynamic code in LS-DYNA. e Multi-Material Arbitrary Lagrangian–Eulerian (MMALE)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
