摘要
通过以某载货汽车为研究对象,测定其前桥的疲劳特性曲线,以及前桥在汽车试验场强化路面、山区公路和普通公路上行驶时的载荷时间历程,采用雨流计数法及数理统计方法得到载荷分布形式,同时,根据疲劳特性曲线和各种路面的程序载荷谱采用修正的Miner线性累积损伤理论计算各种路面的疲劳寿命,从而得到各种路面相对于普通公路的强化系数,为准确评价汽车可靠性和制订科学的汽车可靠性强化试验规范提供了重要依据。
A kind of truck as the researched object, mensurated the front axle's fatigue characteristic curve, and it's load-time history when truck is running on the proving ground enhancement roads, mountainous roads and tar-paved roads, obtained the distributing function of loads by means of rain-flow counting met-hod and statistical theory. According to the fatigue characteristic curve and routine loads spectrums of each roads, calculated the front axle's fatigue life respectively, taking advantage of amended Miner linear accumulated fatigue damage theory, obtained the enhancement coefficients of each roads by comparative norm of tar-paved roads. Provided an important foundation for precisely evaluating automotive reliability and establishing a reasonable principle of automotive reliability enhancement test.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2004年第10期73-76,81,共5页
Journal of Mechanical Engineering
基金
国家自然科学基金(No.50375142)
高等学校重点实验室访问学者基金资助项目
关键词
汽车
可靠性试验
强化系数
Automobile Reliability test Enhancement coefficient
