基于六西格玛设计的汽车传动轴稳健性分析

Robust Analysis on Automotive Drive Shaft Based on Orthogonal Experimental Design

针对某车型传动轴抗高扭疲劳强度较差的实例,应用六西格玛设计。根据该车特性和传动轴的失效特征确定了高扭疲劳试验作为主要评价指标,并把低扭疲劳试验和中扭试验作为辅助评价指标,结合六西格玛设计方法与有限元仿真分析,抑制噪声因子对系统的影响,以最少的运算次数和样本试验,准确地找出对传动轴抗高扭疲劳强度影响显著,且对噪声不敏感的因子。通过改变优选的控制因子,大幅度提高了该车传动轴的抗高扭疲劳强度,显著提升了传动轴的稳健性。

Taking a drive shaft which has the poor anti-high torsional fatigue strength as an example, the application of design for Six Sigma is introduced in this paper. High torsional fatigue test car features and drive shaft failure characteristics identified as the main index, and low and medium torsional fatigue tests as the secondary evaluation index, combined with orthogonal design method and finite element simulation analysis to suppress noise factor impact on the system, a minimum number of operations and sample test to accurately identify the factors that influence high torsional fatigue strength of the drive shaft, and is not sensitive to the noise. Finally, by changing the preferred control factor, the substantial increase in the vehicle drive shaft of the anti-high torsional fatigue strength, it significantly improves the transmission shaft soundness.