超高强球面结构抗冲击试验研究OA

To explore the anti-penetration abilities of irregular structures made of high-strength alloy steel,a target enhanced with ultra-high-strength spherical structures(UHS-SS)was manufactured in this work.The UHS-SS is fabricated from ultra-high-strength steel(UHSS)and mechanically anchored to the target via threaded high-tensile rods,ensuring structural integrity under projectile penetration loading.A series of penetration tests at an impact velocity of 400 m/s was performed using a 125 mm diameter cannon.The yaw-induced projectile deflection was recorded at 5000 s-1,and the failure mode and penetration depth of the projectile were obtained.Through a comparative analysis of anti-penetration experimental results between semi-infinite concrete targets and UHS-SS-reinforced targets,the influences of ultra-high mechanical performances and the spherical yaw-inducing structure on the deflection and fragmentation of the projectile were disclosed.The test results reveal that at a penetration velocity of 400 m/s,the dimensionless penetration depth of the UHS-SS target is 0.11,and the penetration resistance of the UHS-SS target is about 9 times that of C40 concrete.The anti-penetration performance of UHS-SS is significantly enhanced in comparison to that of the ordinary concrete target.Furthermore,as the projectile penetrates the UHS-SS target,the resultant force on the projectile is in a different direction from that of the projectile velocity,which can deflect and shatter the projectile.The behavior of ricocheting off the surface,deflection-induced secondary impact,and fragmentation of the projectile occurred during the anti-penetration test of the UHS-SS target,and the maximal deflection angle was 83°during the experiment,preventing the projectile from penetrating the interior of the protective structure.The UHS-SS target has a severe erosion effect on the projectile at a lower speed of 400 m/s,which resulted in a mass loss rate of 23.66％in the experiment.Therefore,the risk of a ground-penetrating weapon penetrating the protective works and detonating is significantly reduced.