论文部分内容阅读
通过分析各种变形诱导结构设计特点的基础上,提出了一种有效的变形诱导槽结构。将该变形诱导槽结构应用于某车架前纵梁的碰撞模拟中,以提高其动态吸能特性。选取前纵梁诱导结构的主要设计参数作为研究对象,采用响应面法并结合正交试验设计、显式有限元方法等来进行分析。建立了前纵梁诱导结构的总吸能和最大冲击载荷的多目标优化模型,并对模型的精度进行了验证。采用MATLAB求解得到了薄壁梁的最优设计参数和多目标优化后的Pareto最优解,并通过有限元分析对薄壁梁最优设计参数进行了验证。最后将优化好的薄壁纵梁诱导结构应用于某越野车40%偏置碰模拟中,结果表明A柱的加速度峰值显著降低,整车的被动安全性得到提高。
Based on the analysis of various deformation-induced structural design features, an effective deformation-induced groove structure is proposed. The deformation induced groove structure is applied to the collision simulation of a frame front longitudinal beam to improve its dynamic energy absorption characteristics. Select the main design parameters of the front side of the structure as the research object, using response surface method combined with orthogonal experimental design, explicit finite element method to analyze. The multi-objective optimization model of total energy absorption and maximum impact load of the front-beam induced structure is established and the accuracy of the model is verified. The optimal design parameters of thin-walled beam and Pareto optimal solution of multi-objective optimization are obtained by MATLAB. The optimal design parameters of thin-walled beam are verified by finite element analysis. Finally, the optimized thin-walled longitudinal girder induction structure is applied to a 40% offset simulation of an off-road vehicle. The results show that the peak acceleration of A-pillar is significantly reduced and the passive safety of the vehicle is improved.