Development of high velocity gas gun with a new trigger system-numerical analysis

10th International Conference Numerical Analysis in Engineering

数学;工业技术

Husin, Z.^1 ; Homma, H.^2

Graduate School of Department of Mechanical Engineering, University of Sumatera Utara, Medan, Indonesia^1

Department of Mechanical Engineering, Faculty of Engineering, University of Sumatera Utara, Medan, Indonesia^2

关键词: Controlled experiment;    Gas gun;    High velocity;    Impact velocities;    Material strength;    Projectile velocity;    Trap materials;    Trigger systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/308/1/012049/pdf
DOI  :  10.1088/1757-899X/308/1/012049

学科分类：工业工程学

来源: IOP

【 摘 要 】

In development of high performance armor vests, we need to carry out well controlled experiments using bullet speed of more than 900 m/sec. After reviewing trigger systems used for high velocity gas guns, this research intends to develop a new trigger system, which can realize precise and reproducible impact tests at impact velocity of more than 900 m/sec. A new trigger system developed here is called a projectile trap. A projectile trap is placed between a reservoir and a barrel. A projectile trap has two functions of a sealing disk and triggering. Polyamidimide is selected for the trap material and dimensions of the projectile trap are determined by numerical analysis for several levels of launching pressure to change the projectile velocity. Numerical analysis results show that projectile trap designed here can operate reasonably and stresses caused during launching operation are less than material strength. It means a projectile trap can be reused for the next shooting.