A Study on the Correction of Error Induced by FTOD for Investigation of a Metal Jet Behavior

Joo, Jaehyun; Lee, Heonjoo; Kim, Siwoo

doi:2014.17.5.577

J. KIMS Technol > Volume 17(5); 2014 > Article

Journal of the Korea Institute of Military Science and Technology 2014;17(5):577-584.
DOI: https://doi.org/10.9766/KIMST.2014.17.5.577

A Study on the Correction of Error Induced by FTOD for Investigation of a Metal Jet Behavior

Jaehyun Joo, Heonjoo Lee, Siwoo Kim

¹The 5th Research and Development Institute, Agency for Defense Development
²The 4th Research and Development Institute, Agency for Defense Development

금속제트 거동 분석에서의 FTOD 오차 보정에 관한 연구

주재현, 이헌주, 김시우

¹국방과학연구소 제5기술연구본부
²국방과학연구소 제4기술연구본부

Abstract

In this study, the behavior of a shaped charge projectile's metal jet was analyzed using flash radiography. The projectile was installed horizontally to observe the behavior of jet for enough time. While the X-ray tube heads are fixed at one point, the behavior range of the jet is wide in this experimental set up, therefore the angle between the X-ray tube heads and the jet tip is changed continuously as jet moves forward. Jet particle's locations calculated from the X-ray films become different from their real positions under this situation because of the film to object distance(FTOD) and correction for error by FTOD is required. In this study, a method was devised to correct the error by FTOD and this was applied for the investigation of jet behavior of a 70 mm caliber's shaped charge.

Key Words: Shaped Charge, Metal Jet, Flash Radiography, Film to Object Distance