다중 구속조건을 고려한 격자체 구조물의 충격해석 모델개선

다국어 초록 (Multilingual Abstract)

The dynamic impact analysis is performed for predicting the buckling behavior of a grid structure under the lateral<br/>
impact load by finite element method. The grid structure is composed of several thin plates which were inserted each<br/>
other and then each contact places were welded by laser welding. The finite element model is produced using preprocessor<br/>
I-DEAS, and solved using nonlinear commercial solver ABAQUS/explicit. In this work, two models are<br/>
proposed for FE analysis. One is the simplified model and the other is multi constrained one. Applied boundary<br/>
conditions for dynamic impact analysis were nearly the same with actual boundary conditions for impact test. The<br/>
dynamic impact parameters of a grid structure such as critical impact acceleration, impact force and buckling mode and<br/>
so on, are over-estimated with test results. Based on these results, the FE analysis model of the grid structure is need to<br/>
modify the stiffness of a grid cell structure. According to these results, the FE model is modified for estimating the<br/>
buckling behavior of grid structure. This modified FE model will be compared with test and analysis results using the<br/>
simplified model.

목차 (Table of Contents)

• Abstract
  
• 1. 서론
  
• 2. 격자체 구조물의 충격해석모델
  
• 3. 결과 및 고찰
  
• 4. 결론
  
• 5. 후기
  
• 참고문헌