汽车前轴动态特性的可靠性优化设计

摘要

Combining with the reliability analysis and the optimization technique, a reliability optimization design method was presented for improving the dynamic characteristics of automotive front axle.A reliability optimization model of dynamic characteristics of automotive front axle was established, the first order mode frequency and the velocity admittance of driving point of engine excitation were used as design constraints of reliability—based optimization, the total mass of front axle was used as the design objective.The reliability-based optimization problem of a micro—car front axle was solved, which shows that the dynamic characteristics of front axle are improved and the goals of reliability optimization design are achieved.%将可靠性分析与优化技术相结合,提出一种改善汽车前轴动态特性的可靠性优化设计方法.该方法建立了汽车前轴动态特性的可靠性优化模型,以一阶模态频率和发动机激励点的驱动点速度导纳为动态特性约束,以前轴总质量为优化目标,对前轴进行可靠性优化.对某微车前轴动态特性的可靠性优化设计结果表明,该方法有效酶善了前轴的动态特性,动态特性约束满足了可靠度设计要求,达到了可靠性优化设计的目的.