• 论文 •

### 基于Sobol和EFAST法的枪弹转动角速度全局灵敏度仿真分析

1. （1.北京理工大学 爆炸科学与技术国家重点实验室， 北京 100081；2.中国兵器工业第208研究所 瞬态冲击技术重点实验室， 北京 102202；3.南京理工大学 能源与动力工程学院， 江苏 南京 210094）
• 上线日期:2022-08-25
• 通讯作者: 王建中（1963—），男，教授，博士生导师 E-mail:cwjzwang@bit.edu.cn
• 作者简介:魏伟（1984—），女，高级工程师，博士研究生。E-mail：mable58670@163.com；
张竞文（1998—），女，硕士研究生。E-mail：a18851197609@163.com；
常思江（1983—），男，副研究员，硕士生导师，博士。E-mail: ballistics@126.com；
王浩圣（1977—），男，研究员级高级工程师，硕士。E-mail：whs69771368@126.com
• 基金资助:
瞬态冲击技术重点实验室基金项目（6142606203304）

### Global Sensitivity Analysis of Bullet's Angular Velocity Based on Sobol and EFAST Method

WEI Wei1,2， ZHANG Jingwen3， CHANG Sijiang3， WANG Haosheng2， WANG Jianzhong1

1. (1.State Key Laboratory of Explosive Science and Technology，Beijing Institute of Technology，Beijing 100081，China；2.Science and Technology on Transient Impact Laboratory, No.208 Research Institute of China Ordnance, Beijing 102202, China；3.School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)
• Online:2022-08-25

Abstract: For the needs of conducting exterior ballistic tests or studying flight dynamics, various devices for flight state measurement are often installed outside the bullets. Due to the interference of various random factors in the shooting and flight of bullets, the output of bullet borne measurement device is directly affected. In order to better design the experiment and process related data, this paper adopts the scheme of measuring the angular velocity of the bullet with the attitude measurement device. Using the five-degree-of-freedom rigid body trajectory equations, Sobol's method based on Monte Carlo method for target practice and Extended Fourier amplitude sensitivity test method (EFAST) is used to analyze the influence of the output of attitude measurement on the sensitivity of initial velocity fluctuation, initial disturbance and other factors. The results of quantitative analysis show that: (1) The initial velocity and initial angle of attack have a great influence on the radial output of the attitude measurement device along the bullet body, and the initial velocity can significantly influence the axial output of the attitude measurement device; (2) Both Sobol's method and the EFAST method can quantitatively analyze the contribution rate of parameters to output variables. However, EFAST is more robust and efficient.