基于NSGA-Ⅱ遗传算法的高速动车组轴箱弹簧可靠性稳健设计  

Reliability-based Robust Design of High-speed EMU Axle-box Spring Based on NSGA-Ⅱ

作　　者：王红[1] 姚凯[2] 刘万选[1] 

机构地区：[1]兰州交通大学机电工程学院,甘肃兰州730070 [2]中国南车青岛四方机车车辆股份有限公司,山东青岛266031

出　　处：《铁道学报》2015年第6期36-40,共5页Journal of the China Railway Society

基　　金：国家自然科学基金(71361019)

摘　　要：为提高高速车辆零部件的可靠性和稳健性,结合可靠性优化设计理论和稳健设计方法,将可靠性灵敏度融入轴箱弹簧的可靠性稳健优化设计模型中,并将其归结为多目标优化问题。采用NSGA-Ⅱ遗传算法对数值算例进行计算,获得其Pareto解,根据经验和目标函数的重要性从中选出优化设计最满意的解。分析结果表明:在轴箱弹簧进行可靠性稳健优化设计后,降低了弹簧的质量,提高了弹簧的可靠性,同时使弹簧的可靠性对各基本设计参数的灵敏度数值明显降低,轴箱弹簧的安全可靠性和稳健性得以提高,验证了该设计方法的实用性和有效性。In order to improve the reliability and robustness of the parts of high‐speed vehicles , based on the re‐liability optimization design theory and the robust design method , the reliability sensitivity was integrated into reliability‐based robust design model of the axle‐box spring ,which was described as a multi‐objective optimiza‐tion problem . The paper calculated the numerical example for the Pareto solutions by using the NSGA‐Ⅱ ge‐netic algorithm , and selected the best solution to the optimal design according to the experience and the impor‐tance of the objective function . The analysis results showed that the mass of spring was reduced and the relia‐bility of spring was improved after the reliability‐based robust optimization design for axle‐box spring . Fur‐ther , the sensitivity value of each basic design parameters relative to the reliability of spring decreased signifi‐cantly w hile the reliability and robustness increased , verifying the practicability and effectiveness of the design method .

关 键 词：高速动车组 轴箱弹簧 可靠性灵敏度 稳健设计 NSGA-Ⅱ 

分 类 号：TH135.1[机械工程—机械制造及自动化]