动力总成悬置系统稳健设计的区间和随机模型对比研究

吴 杰;;董志新

振动与冲击 ›› 2013, Vol. 32 ›› Issue (20) : 76-80.

PDF(786 KB)
PDF(786 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (20) : 76-80.
论文

动力总成悬置系统稳健设计的区间和随机模型对比研究

  • 吴 杰1, 2,董志新1
作者信息 +

Robustness optimization method for frequency and decoupling ratio of powertrain mounting system

  • WU Jie 1, 2,DONG Zhi-xin1
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文章历史 +

摘要

由于测量、加工、安装误差及老化等原因,悬置实际刚度通常在其名义设计值附近波动。为提高悬置系统频率配置和解耦布置的稳健性,文中采用区间数描述悬置刚度的波动范围,采用区间概率度和区间可靠度分别表征频率配置和解耦布置的稳健性,首先建立了悬置系统的区间稳健优化模型。假设悬置刚度的波动服从均匀分布,建立了悬置系统的随机稳健优化模型。将两种优化模型用于对某轿车悬置系统频率和解耦率的稳健性优化,结果表明,区间和随机稳健优化结果具有较好地一致性。

Abstract

The mount stiffness of a powertrain mounting system (PMS) generally fluctuates around its nominal design value due to measurement inaccuracy, processing and installation errors, and material aging. To improve the robustness of the frequency allocation and decoupling layout of a PMS, an interval optimization model is presented, in which interval number is used to describe the uncertainty of the mount stiffness, and interval reliability and interval possibility indices are used to characterize the robustness of the decoupling layout and frequency allocation, respectively. Then a six-sigma robust optimization model is constructed in which the mount stiffness is assumed to obey uniform distribution. The interval optimization and six-sigma optimization approaches are used to maximize the decoupling ratios of a general car PMS under robustness requirements of frequency allocation and decoupling layout. Optimization results show that both the interval optimization and the six-sigma optimization can obtain satisfactory robust design, and the optimization results of the two optimization methods have good consistency.

关键词

动力总成悬置系统 / 区间分析 / 解耦率 / 稳健优化

Key words

powertrain mounting system / interval analysis / decoupling ratio / robustness optimization

引用本文

导出引用
吴 杰;;董志新. 动力总成悬置系统稳健设计的区间和随机模型对比研究[J]. 振动与冲击, 2013, 32(20): 76-80
WU Jie;;DONG Zhi-xin. Robustness optimization method for frequency and decoupling ratio of powertrain mounting system [J]. Journal of Vibration and Shock, 2013, 32(20): 76-80

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