A Macroscopic and Mesoscopic Numerical Analysis Method of Explosive Cook-off

Abstract

The invention discloses a macroscopic and microscopic numerical analysis method of explosive cook-off. Firstly, a three-dimensional macroscopic numerical calculation model of the cook-off test object is established; temperature boundary conditions, material properties of the cook-off test object and self-heating reaction source items are assigned to The three-dimensional macroscopic numerical calculation model performs numerical calculation; the mesoscopic numerical analysis area is selected at the macroscopic ignition position, and the temperature boundary conditions and the material properties of the cook-off test object are assigned to the three-dimensional macroscopic numerical calculation model to perform numerical calculation again and extract the mesoscopic values Analyze the boundary temperature of the region only under the effect of heat conduction; establish a three-dimensional von Lonei diagram mesoscopic numerical calculation model, and use the boundary temperature as the temperature boundary condition of the mesoscopic numerical calculation model; The thermal reaction source term is respectively assigned to the corresponding explosive component regions in the mesoscopic numerical calculation model, and the temperature distribution of each explosive component and the explosive component that first responds to ignition are obtained through numerical calculation.

Description

A Macro and Meso Numerical Analysis Method for Burning Explosives technical field The present invention relates to the technical field of finite element numerical calculation, be specifically related to a kind of macro and mesoscopic numerical analysis of explosive roasting and burning. analysis method. Background technique With the rapid development of modern military technology, higher requirements are put forward for the safety and battlefield survivability of ammunition. beg. Boil-off test of explosives is one of the important methods to test and evaluate the thermal vulnerability of explosives. Due to the high cost of testing, the risk of It can only obtain limited data such as the temperature history and ignition time of the internal monitoring point of the explosive, and the numerical calculation method can be based on Modeling of actual conditions, it is convenient to change parameters such as burning rate and grain size, and information such as ignition po...

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Problems solved by technology

The current numerical simulation calculation only provides a macroscopic description of the cook-off process of the explosive, which reflects the overall melting of the mixed explosive, and cannot directly reflect the thermal decomposition and ignition response of the mesoscopic components of the mixed explosive during the cook-off process.

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