Abstract: Considering the complexity of the human body structure, the human voxel model with 402 anatomical structures based on the Chinese Visible Human dataset was proposed to assess the performance of the protective equipment and the effectiveness of the killing element when it impacts on the protected body; An algorithm for assessing the performance of protective equipment and the lethal effectiveness of weapons based on anatomical structures was proposed. A module for assessing the performance of protective equipment and the lethality of weapons have been developed in the vulnerability software. Obtained killing characteristic quantity changes when 5.8×42 mm rifle bullet impacts NIJ III protection at different velocity; Obtained the relationship between different head-helmet gaps and human survival rate when 9 mm pistol bullet impacts the MICH helmet. The results of the study show that the lethality of a 5.8×42 mm rifle bullet impacting on the human body at 850 m/s was 80% (protected) and 4% (unprotected). The lethality of the bullet improves with target velocity (lethality rate >50 % at a speed of 950 m/s); The survival rate is 40 %when a 9 mm pistol bullet impacts the head (without a helmet), and 84 %when wearing a helmet with 25 mm head-helmet interval. Therefore, a wider head-helmet interval provides more effective head protection. The study can provide the basis for the assessment of the effectiveness of typical killing element (bullet and fragment) and the performance of protective equipment, as well as a reference for the weapon design and the protective equipment development.

Key words: human vulnerability, protective performance, kill efficiency, voxel model, assessment software