This paper first discusses the deformable block model based on the displacement nodes,and analyzes the search process and flow of NS-DBMA algorithm,then proposes the motion estimation algorithm by node search based on deformable block matching with threshold.

During the course of the cavern excavation,because of action of stress release and adjustment,in period of acceleration deformation,the maximum rate of block deformation reaches 1.

A discrete element model for the deformable for the deformable bodies was built according to the dynamic equation and the model decomposition Based on the fundamental principle of discrete element method, the contact model was selected and the corresponding theoretical formula deduced.

An analytical model is established to describe the complex behavior of ceramic/metal armor under the impact of a deformable projectile, which takes three aspects into account: the mushroom deformation of the projectile, the fragments of the ceramic tile, and the formation and change of ceramic conoid and the deformation of metal backup plate.

A new analytical model was established to describe the complex behavior of ceramic/metal armor under impact of deformable projectile by assuming some hypotheses.