Theoretical model of armored vehicle bottom plate subjected to detonation of shallow-buried explosives,with occupant safety considered
When subjected to shallow-buried explosions,a theoretical model was established to characterize the dynamic response of a mass-spring-damping system attached to a monolithic beam.For validation,nu-merical simulations with the method of finite elements were performed,with good agreement between theo-retical and numerical results achieved.The model was then employed to quantify the effects of explosive mass,yield stress of beam material,spring stiffness,damping coefficient,and boundary condition on peak displacement,velocity and acceleration of the beam and the supported mass.With increasing explosion mass or decreasing yield stress,the peak displacement,velocity and acceleration of both the beam and mass increased.When the spring stiffness was constant,with the increase of damping coefficient,the peak displacement of the midpoint decreased,and the peak acceleration of mass increased.When the damping coefficient remained constant,the spring stiffness had little effect on the peak displacement of the beam and the peak acceleration of the mass.As the spring stiffness was varied,selecting a proper damping coeffi-cient could reduce the peak velocity of the mass.With occupant safety considered,the proposed model pro-vides useful design guidance for designing high-performance protective structures for armored vehicles.
shallow-buried explosionsvehicle bottom against landminesoccupantstheoretical modelmass-spring-damping system
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