Grid model generation method and device and storage medium

The invention relates to the field of modeling, and discloses a grid model generation method and device and a storage medium, and the method comprises the steps: determining an initial grid model according to a pre-selected target model type, and processing the initial grid model based on each pre-input target feature size and each reference grid size to obtain a reference grid model; judging whether a transition layer exists or not according to the target model type; under the condition that the transition layer exists, determining the position of the transition layer in the reference grid model, and updating a reference grid at the position of the transition layer into a transition layer grid to obtain a target grid model; and under the condition that a transition layer does not exist, the reference grid model is determined as the target grid model, so that hexahedral grid division is rapidly performed on each model in the explosion impact process, the grid precision and quality are improved, and the grid c