고속충돌 강판구조물의 대변형 관통문제에 관한 연구

A Study on the Deformation and Perforation Problem for Steel Plates Subjected to High-Speed Collision

본 연구의 목적은 선체 판부재에 충돌체가 충돌하는 경우, 내충돌성을 평가하는 것이다. 충돌체 및 피충돌체를 모두 해석대상으로 취하였으며, 충돌체의 운동에너지, 즉, 충돌체의 질량, 속도를 변화시켜가면서 피충돌체의 내 충돌성을 평가하였다. 충돌체의 운동에너지에 따라 심지어는 피충돌체가 관통되는 경우도 해석대상에 포함하였으며, 과거의 실험 자료를 통한 그 정도를 검증하고 유한요소법을 통한 내충돌성 평가 적용성을 검토하였다.

Steel structures such as ships, offshore platforms and land-based structures are prone to suffer severe damages due to dynamic loading. Clearly, in such cases the integrity of the structures that started out being adequate may become marginal later in life or even reach the catastrophic failure state. In this context, a more precise assessment of dynamic strength of large scale steel structures is recognized as the most essential technology in the structural design activities for structural engineering field such as ships, offshore structures, mobile vehicles, pressure vessels and so on. The aim of this study is the evaluation of the collision performance of the ship structural plate members subjected to high-speed collision load. The validity of numerical method based on the non-linear finite element analysis is presented under the comparison of numerical results to the experimental results.