文档介绍：南京航空航天大学
硕士学位论文
汽车动力总成悬置系统的设计、分析与优化
姓名:张斌
申请学位级别:硕士
专业:车辆工程
指导教师:翁建生
20060101
南京航空航天大学硕士学位论文
摘要
随着科学技术的不断发展人们对汽车的乘坐舒适性要求日益提高而良好
的平顺性和低噪声是现代汽车的一个重要标志汽车动力总成是汽车振动的主要
激振源之一对汽车的乘坐舒适性有很大的影响设计合理的汽车动力总成悬置
系统可以明显地降低汽车的振动改善汽车的乘坐舒适性和降低噪声
本文针对某轻型卡车总成悬置系统建立了悬置系统的动力学模型采用模
糊多目标优化的方法在人工决断的基础上考虑解耦动反力矩等综合性能为
设计目标运用转轴直接搜索可行方向法 DSFD 优化算法对系统进行了优化
设计同时探讨了动力总成与底盘系统的耦合振动特性并在此基础上运用有限
元(FEA)的方法求解橡胶悬置的刚度特性分析了橡胶悬置各个因数对刚度影
响的规律采用均匀设计的方法拟合了悬置刚度关于各个参数的公式为工程实
际应用提供了快捷的设计方法
根据优化设计理论提出的改进措施进行了数值仿真验证和实车改制及试
验对设计前后系统的隔振特性进行了比较结果表明优化设计后的悬置系
统相对于原系统的隔振性能有了较大的改进
本文的研究方法和和研究结果对汽车动力总成悬置系统的隔振分析和设计
具有一定的指导意义对工程实际中类似的隔振系统的设计也有一定的参考价
值

关键词汽车动力总成悬置系统隔振均匀试验设计 DSFD 优化方法耦
合有限元
动力总成悬置系统的设计分析与优化
Abstract
With the ongoing development of technology, better and better passenger
fort is required for the automobile. Nice passenger fort
and low noise are considered to be two important marks for modern
automobile. Since power train is the main source of vibration which has
significant influence on fort, vibration can be sharply decreased by a
well-designed power train so as to improve the fort and lower the
noise.
In this paper, a dynamic model is established to aim at the
improvement of power train mounts for a light truck. By using the fuzzy multiple
targets optimization design methodology, the decoupling reactive force is set
up to be the target on the basis of artificial judgement, DSFD also is applied for
the design optimization. And, the foundation study of coupling of the power
train and the chassis system in the paper. The stiffness of rubber mounts is
formulated using FEA, By analyzing the relations between the stiffness and all
kind of factors of rubber mounts, the formula of the stiffness for a shortcut to
engineering practice posed on the two adopting uniform design theory,
The stimulation and field testing are done based on the results by
optimization design., The results showed a relative improvement on power
train isolation