摘要
基于315个试验点,样本容量为4 000的最高爆发压力pz试验数据,分别用正态分布、对数正态分布、威布尔分布、伽玛分布和贝塔分布对样本数据进行了拟合,并用分布拟合优度进行了检验.检验结果表明:在未发生爆震试验点,最高爆发压力循环变动服从3个参数的威布尔分布(置信度α=0.05).
Peak pressure sample data of 315 groups with a sample size of 4 000 were fitted respectively in normal distribution,logarithmic distribution,Weibull distribution,gamma distribution and beta distribution.The goodness of fit was analyzed and tested.The result shows that the peak pressure cyclic variation of the knock-free test group follows three-parameter Weibull distribution（confidence level α=0.05）
出处
《上海工程技术大学学报》
CAS
2009年第4期287-290,共4页
Journal of Shanghai University of Engineering Science
关键词
汽油机
循环变动
最高爆发压力
分布规律
gasoline engine
cyclic variation
peak pressure
distribution law
