Identification of Projectile Structure Response Combined with Modal Analysis and Blind Source Separation

2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

材料科学;无线电电子学;计算机科学

Zhao, Haifeng^1,2 ; Zhang, Ya^1 ; Li, Shizhong^1 ; Guo, Yan^2

Faculty of Mechanical and Electrical Engineering, North University of China, Taiyuan, China^1

Faculty of Mechanical and Electrical Engineering, Nanjing College of Information Technology, Nanjing, China^2

关键词: Ensemble empirical mode decomposition;    Frequency domain response;    High frequency vibration;    Penetration characteristic;    Periodic load;    Projectile structures;    Simulation analysis;    Structural response;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/439/3/032008/pdf
DOI  :  10.1088/1757-899X/439/3/032008

来源: IOP

【 摘 要 】

In order to study the frequency domain response of the projectile structure in the process of hard target penetration, a method of combining modal analysis and blind source separation is proposed to identify the response of projectile structures. Firstly, the natural frequency range of the projectile structure under the free state is given through the simulation analysis of the projectile structure, and the resonant frequency of the projectile structure is obtained when the periodic load is excited. Further, through the ensemble empirical mode decomposition, ascending dimension, recombination and blind source separation of the test signals, the penetration characteristics and high-frequency vibration signals of the projectile are obtained. Finally, comparing the simulated resonant frequency and the high-frequency vibration frequency after separation, the similar component is recognized as the structural response of projectile penetrating process.