Research On Damage Effect Of Bionic Human In Explosive Environment Based On Measurement And Simulation

With the change of tactical thinking and the shift of attack targets in modern warfare,as well as the continuous progress of science and technology,explosive weapons are used more and more frequently in modern warfare.Due to various reasons,such as their wide killing area,injury factors,and high hitting accuracy.The fatal damage caused by explosive weapons to the human body is mainly caused by fragmentation and shock waves.Based on field experiments and model simulation,this paper explores the effect of fragments and shock waves generated under explosion and shock conditions on the damage mechanism of combatants,which mainly includes the following three aspects of research:(1)Exploring the damage law and mechanism of high-speed spherical fragments on non biological targets.The main work includes: conducting field experiments on spherical fragmentation penetration gelatin of different sizes.Using ultra-high-speed cameras to shoot the penetration process.Processing the obtained penetration image frame by frame.To identify the position of fragmentation,extract the instantaneous cavity of penetration frame by frame during the penetration process,and obtain the change law of penetration speed and penetration depth with time,as well as the change law of penetration cavity.Exploring the damage law and damage mechanism of spherical fragmentation to gelatin(human tissue substitute)under different working conditions were explored.(2)The mathematical model of spherical fragments penetrating ballistic gelatin is explored and optimized,and a two-dimensional axisymmetric model of spherical fragmentation penetration gelatin is established by using software.The main work includes: exploring the law of penetration speed and penetration depth with time during the penetration process,deriving and establishing a mathematical model according to the physical formula,using genetic algorithm to optimize the model parameters of the experimental data under different working conditions,obtaining a mathematical model for calculating the penetration speed and penetration depth after optimization,and verifying the validity of the mathematical model and the optimized model parameters.The software is used to model the spherical fragmentation penetration gelatin,and the three-dimensional full model and the two-dimensional axisymmetric model are numerically simulated,and the simulation results are compared,and a more applicable finite element model and model parameters are obtained by combining the experimental data under different working conditions on site.(3)Based on the software,the finite element model of the human chest cavity is established,and the bionic man is placed in the set explosion and impact scene for field experiments to explore the effect of shock wave on personnel damage.The main work includes: establishing a human chest model,which includes heart,muscle,lung,shoulder blade,ribs,spine,air domain.To simulate the figures,according to the simulation results,setting up field experiments,and installing acceleration sensors,displacement sensors and force sensors in different parts of the bionic person;Combining simulation and field experiment results,to explore the effect of shock waves on human’s injury mechanism.Based on a large number of literature research,based on field experimental data and numerical simulation,this paper studies the damage mechanism of two main killer elements(fragmentation and shock wave)in the explosion and impact environment.Provide technical support for weapons and equipment assessment research and development,individual protection,battlefield comprehensive damage effect and refined assessment.