摘要
为了改善汽车的被动安全性能,提出将一种单杆单筒式磁流变阻尼器应用于汽车前部吸能结构中。提出以修正Bingham塑性模型(BPM模型)为理论基础,以最大阻尼力和可调范围为优化目标,运用mode FRONTIER自带的非支配排序遗传算法(NSGA-II)对所采用的磁流变阻尼器结构参数进行多目标优化分析。优化结果表明:最大阻尼力和可调范围成反比,所用的优化算法不可能使两个优化目标同时达到最优,只能在众多前沿解中选择符合条件的优化解。优化后的磁流变阻力器磁场分布更加集中合理。
In order to improve automotive passive safety performance,a single rod cylinder magnetorheological damper that applied to the front energy-absorbing structure is proposed and optimized. By means of Bingham-plastic nonlinear flow modified model( BPM),taking the maximum damping force and the damping dynamic range as the optimization goals to avoid the design limitation under the high impact condition,the NSGA-II algorithm of mode FRONTIER is used to design the structural parameters of magnetorheological damper for multi-objective optimization. Optimization results showed that the maximum damping force and the damping dynamic range are inversely proportional,the optimization algorithm that used made it impossible for two optimization objectives to achieve the optimal at the same time,only to choose the optimized solutions that meet the conditions from all the Pareto solutions,the magnetic field distribution of optimized magnetorheological damper is more concentrated and reasonable.
出处
《机床与液压》
北大核心
2015年第24期34-39,共6页
Machine Tool & Hydraulics
基金
supported by Graduate Student Innovation fund of Chongqing University of Technology (YCX2014201)
