A Study on Optimal Spot-weld Layout Design of the Vehicle Body Structure Considering Vibration and Side Impact

진동특성 및 측면충돌 성능을 고려한 차체의 점용접 치수 최적화 연구

In this study we conduct the optimal spot-weld layout design of vehicle body structure considering dynamic stiffness and side impact. We conduct both linear static analysis and nonlinear analysis with a baseline model to verify the process. 13 design variables will be selected for the effect analysis. Then, topology optimization is conducted to each selected design variable. The design constraints are formulated to improve the dynamic stiffness and side impact performance. Objective function is to set the density of weld component. Optimal spot-weld layout design are compared with the baseline model to show the improvement.