高速行驶的轿车轮胎多边形磨损机理分析.docx

摘要
摘要
本课题针对我国轿车高速行驶在高等级路面上时轮胎产生多边形磨损的新现象展开研究,通过轮胎试验和基于自激振动系统模型的仿真相结合的方法, 深入挖掘产生轮胎周向多边形磨损的内在机理,找出其主要影响因素;寻找降低或避免轮胎多边形磨损的途径,探索一套切实可行的、具有实际价值的轮胎多边形磨损的解决方法。本课题是随着我国高速公路发展,汽车拥有量的增多而产生的新课题,其机理研究涉及轮胎振动特性、整车垂向振动特性、及轮胎磨损与振动相互影响等诸多因素,是一个具有学术探讨和研究价值的应用基础课题。对汽车整车设计及轮胎设计具有重要的参考价值。
关键词:轮胎多边形磨损,自激振动,轮胎振动特性,轮胎模态试验
ABSTRACT
ABSTRACT
The research mainly studies the new wear appearance of automobile tire traveling at high velocity on the expressway in our country in the latest mean 0f the bining the experiments and the analysis of the 3-denemsion self excited system prises tread mass,unsprung mass and sprung mass, mechanism of polygonal wear of automobile tire in circumference is rooted deeply. The main factors influencing polygonal wear of tire are analyzed and establish the mathematics model of polygonal wear of automobile tire,in order to give constructive suggestion in reducing the tire paper is brought forward under the rapid development of highway and more and more automobile quantity at present· Since the mechanism research is related with many factors such as the vibration
characteristic of tire and suspension,mutual influence between wear and vibration of tire and sO this research is worthwhile and the achievements may be used to
direct the design of vehicle and tire.
Keywords"tire polygonal weaL self excited vibration,tire vibration characteristic, tire mode test
玎
符号说明
符号说明
符号 意义
C 垂向载荷,M
220KPa工况下轮胎纵向刚
K纵220 度,N/m
280KPa上况下轮胎纵向刚
K纵280 度,N/m
作动头及平板筲的等效质
Mo
量,Kg
F 作动力,Ⅲ
系统的近似阻尼值,
e
N·sec}m
振动一周实际阻尼所耗散
%
的能量
强迫振动的角频率,
∞
rad|sea
X 强迫振动的振幅,琊白激振动系统的平衡位置
X(f)
点,m
H(f) t时刻胎面的总磨损量,m 上一个周期胎面某点磨损
H(t一丁1
的高度,m
t时刻胎面某点的实时磨损
,(f)
高度,m
fw 轮胎的滚动频率,Hz
y 轮胎的外倾角,deg
VI
符I)说明
a 轮胎的前束角,deg
a, 外倾的侧向力系数,1/deg
P(f) 轮胎的实时乖向力,柳
轮胎与地面间的磨损系数,
"
N/m
,l 指数系数
F(f) 侧向力,枷
昂 系统的静态自重,柳
m1 接地印迹胎面质量,Kg
m2 1卜簧载质量,Kg
m3 簧载质量,Kg
k1 轮胎胎面刚度,
k2 轮胎胎侧刚度,
k3 恳架刚度,N/m
q 轮胎胎面阻尼,N·sec/m
乞 轮胎胎侧阻尼,N·sec/m
岛 悬架阻尼,Ⅳ·sec/m
S 特征根
or 特征根实部或