汽车手动变速箱的齿轮敲击模拟和分析

本文阐述了汽车手动变速箱的扭振模型和分析，该模型是为齿轮敲击的分析和预测而开发的，它尽可能包容了动力传动系的许多部件去研究所有速度工况的敲击响应，模型包括的元件有发动机，离合器，飞轮，承载和非承载齿轮以及传动轴，适用于MATLAB的数值方法来解动力分析采用的差分方程，所得结果显示了模型和分析图解的有效性。已经开发了 一个软件包可用于观察和分析任何动力传动系模型，本文介绍了采用该软件包分析Daimler-Chrysler T 350变速箱和其结果，它表明了齿轮敲击可能出现双侧，单侧和不规则碰撞三种主要的形式。敲击系数可用来比较不同齿轮副产生敲击的大小、它对于为最好地降低敲击声协调离合器的是十分有益的。

Gear Rattle Modelling And Analysis for Automotive Manual Transmissions

This paper describes a model for torsional vibration of automotive manual transmissions and its subsequent analysis. The model is developed for the purpose of analysis and prediction of gear rattles. Efforts have been made to include as many components of power train as possible and to study the rattle responses of all the speeds. Elements of the model include engine, clutch, flywheel, laden and unladen gears, and shafts. Numerical methods available in MATLAB for solving the ordinary differential equations are employed for the dynamic analysis.Results are presented to show the effectiveness of the modelling and analysis scheme. A software package has also been developed to build and analyse any power train model. The package was used to analyse the Daimler-Chrysler T350 transmission and the results are presented in the paper. It is shown that the gear rattle may exhibit three major modes of double-sided, single-sided or irregular impacts. A rattle index has been used to compare the rattle levels produced by different gear pairs. This could be very useful for the purpose of tuning the clutch for the best rattle noise reduction.