In this paper, dynamic model of 120mm self-propelled mortar is developed, and multi flexible body dynamics analysis is performed to analyze stresses occurring in the mount during mortar fire. For this, vehicle dynamic system, mortar dynamic system, and finite element mount model are proposed. The commercial program Recurdyn is used in the analysis. As a result of the analysis, the maximum stress(146.9MPa) occurred at the mount side plate. In order to analyze the validity of the analysis results, we performed strain measurement tests by selecting three major points, and the errors of results were 7.91%, 11.15%, and 18.23%, respectively. It is confirmed that the tendency of analysis and test is similar.

ABSTRACT
 1. 서 론
 2. 차량 체계 동역학 모델
  2.1 현수장치
 3. 박격포 체계 동역학 모델
  3.1 구속관계
  3.2 포탄 추진력
  3.3 주퇴복좌기
 4. 마운트 유연체 해석
  4.1 박격포 마운트
  4.2 박격포 유연체 변환
  4.3 시뮬레이션 및 결과
 5. 마운트 변형률 측정 시험
  5.1 캔틸레버 변형률 측정 시험
  5.2 사격 시험 및 결과
 6. 결 론
 REFERENCES

• 김동휘(Hanwha Defense Systems) | Dong-Whi Kim Corresponding Author