目的 获取船舶动力系统设备中增压锅炉内/外壳材料的动态本构模型参数，分析结构在遭受爆炸破片冲击下的抗侵彻性能。方法 通过对锅炉外壳材料和内壳材料的力学性能测试，获得了材料的Modified Johnson-Cook(MJC)强度模型参数与Cockcroft-Latham(CL)断裂准则参数;对比试验和有限元模拟结果，在验证材料本构模型有效性的基础上，开展了锅炉内/外壳材料的抗侵彻性能研究。结果 得到了破片模拟弹(FSP)侵彻该锅炉外壳和内/外壳的弹道极限，发现FSP垂直侵彻锅炉内/外壳靶板过程中发生了剪切冲塞与延性扩孔，弹头发生磨蚀，靶板正面弹孔边缘翻起唇边，背面有一定凸起;在高速撞击下，FSP的45°斜侵彻基本不受弹头初始侵彻时刻不同的接触作用部位的影响，斜侵彻弹丸发生了更为严重的磨蚀。结论 获取的本构模型参数可以用于船舶锅炉抗侵彻有限元仿真，仿真结果对于评估船舶动力系统在破片下的损伤有一定的参考价值。

The work aims to obtain the constitutive model parameters of the inner/outer shell material of the supercharged boiler in the marine power system equipment and analyze the penetration resistance of the structure under the impact of explosive fragments. The Modified Johnson-Cook (MJC) strength model parameters and Cockcroft-Latham (CL) fracture criterion parameters of outer shell material and inner shell material of the boiler were obtained through mechanical property test. By comparing the experimental results with the finite element simulation results, on the basis of verifying the validity of the material constitutive model, the penetration resistance of the inner/outer shell materials of the boiler was studied. The ballistic limits of fragment simulation projectile (FSP) penetrating into the outer shell and inner shell of the boiler were obtained. It was found that during the process of fragment simulation projectile penetrating vertically into the target plate of the inner/outer shell of the boiler, shear punching and ductile reaping occurred, and the bullet was abraded. Under high-speed impact, the 45° oblique penetration of the FSP was basically unaffected by the different contact sites at the initial penetration of the warhead, and the oblique penetration projectile had more serious abrasion. The constitutive model parameters can be used for the finite element numerical simulation of the impact and penetration resistance of the marine boiler, and the simulation results have a certain reference value for evaluating the damage of the marine power system under the fragment.