摘要
为了弥补球形破片侵彻明胶力学模型仅考虑惯性阻力和粘性阻力的局限性,该文在现有模型中引入明胶抗力,得出同时考虑3种阻力的修正模型。以Ф4 mm球形破片为杀伤元,根据最小二乘法原理计算参数,确定了最佳的惯性阻力系数和粘性阻力系数。通过与Ф3mm、Ф4 mm、Ф4.8 mm 3种口径球形破片侵彻明胶试验数据的对比分析,验证了模型参数选取的合理性和准确性。结果表明,修正后的力学模型能够更准确地描述3种口径球形破片侵彻明胶的运动过程。
To improve the mechanical model of the spherical fragments penetrating gelatin including the inertial resistance and the viscosity resistance only, the gelatin resistance is taken into the original model, and a new equation of motion is developed. The correction mechanical model considering three resistances is proposed. Based on the principle of least squares, parameters are calculated to determine the best coefficients of the inertial resistance and the viscous resistance by selecting the φ4 mm diameter spherical fragments as the example. The comparison of calculation and experiment results of φ3 mm, φ4 mm and φ4.8 mm diameter spherical fragments verifies the reasonableness and the accuracy of parameter selection. The results show that the correction mechanical model can describe the movement of the three spherical fragments penetrating the gelatin more accurately.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2012年第5期755-761,共7页
Journal of Nanjing University of Science and Technology
基金
国家973计划资助项目(613104)
江苏省博士研究生科研创新培养基金(CXLX11_0273)
南京理工大学优秀博士论文培养基金
关键词
球形破片
侵彻明胶
修正力学模型
明胶抗力
spherical fragments
penetrating gelatin
correction mechanical models
gelatin resistance
