彈體撞擊多層間隔靶體之動態分析

Abstract

隨著軍事裝備的提高以及高科技武器的發展，對於高速彈體之碰撞及貫穿方面之研究不斷面臨新的挑戰。自從二次大戰以來，高速彈體撞擊及穿透靶體為國際間對於軍事研究的一門重要課題，從研究角度而言探討高速彈體撞擊靶體過程，彈體及靶體的動態反應問題及破壞問題均為頗具挑戰性的問題。 彈體碰撞靶體以及貫穿靶體的過程牽涉到彈體與靶體的大變形、幾何非線性、塑性變形和損傷破裂等材料非線性問題及接觸邊界之相互作用等問題。本文應用有限元素分析軟體模擬彈體衝擊貫穿靶體之過程，分析模型中選擇適當的材料模型進行數值模擬，分析彈體撞擊多層且具間隔之鋼板靶體及混凝土靶體，探討其動態反應分析之結果，檢討彈體減速度曲線、靶體應力變化歷程、靶體破壞等歷程變化。

With the improvement of military equipment and the development of high-tech weapons, on the study the impact and penetration of high-speed projectile continues to face new challenges. Since World War II, it is an important issue that the projectile impacting and penetrating on the specially designed targets for the military research, and researchers have focused on that the dynamic response problem after the impact of the targets. The process of the projectile impact against the targets comprises large deformation, plastic deformation of projectile and targets, and damage of materials, especially non-linear fracture problems and the contact problems. This thesis, investigated the dynamic responses and energy absorption during the projectile perforation of multi-separated target by numerical method. Analysis of impact multi-separated of the steels and concrete targets, the results of dynamic response, including deceleration of projectile, stress variation of target, the weight loss of projectile, and the damage of the target were summarized.