关键词: 车门, 稳健性, 轧制差厚板, 蒙特卡罗模拟, 轻量化

Abstract: For car door structure optimization studies, most of them did not consider the car door uncertainty factors. In order to improve robustness of structure optimized car door's performance, a new type manufacturing process of TRB was applied in car doors, and influences of sheet thicknesses and material performance parameter's volatility on the robustness of each constraint were considered. Combined with Latin hypercube design and RBF model, using dual cycle optimization strategy of combining Monte Carlo simulation with improved non-dominated sorting genetic algorithm, a TRB car door lightweight design was proposed based on 6σ robustness. This method may obtain an optimal solution, and may improve reliability of design variables and robustness of objective function.

Key words: car door, robustness, tailor rolled blank(TRB), Monte Carlo simulation, lightweight