摘要
在法兰螺纹连接结构振动分析实验的基础上,引入粗糙集理论。对实验数据进行时域统计分析,得到响应信号的有效值、方差、偏斜度、峰度以及基座传感器的振动实验的响应信号作为基准求取基座响应信号与各传感器采集信号的相关度。由所得时域统计特征量建立判定法兰螺纹连接状态的信息系统,由粗糙集理论分析表明:偏斜度、峰度和相关度三个特征量可以完全判定螺纹的松紧程度,为连接状态的判断提供了依据。
Rough set theory is introduced by analyzing the vibration experiment of flange screwed connection.Test data are statistically analyzed in time domain in order to obtain effective value,variance,skewness and kurtosis of response signal and vibration experiment response signal for foundation sensor as the reference to get the correlation between foundation response signal and various sensor collection signals.The information system of flange screwed connection state is established by the time domain statistics characteristic quantity.The rough set theory shows skewness and kurtosis and correlation can determine the fastening degree of screw thread completely which provide reference for connection state judgement.
出处
《中国重型装备》
2010年第4期4-6,9,共4页
CHINA HEAVY EQUIPMENT
基金
国家自然科学基金
中国工程物理研究院联合基金资助项目(项目编号:10876034)
关键词
粗糙集
螺纹连接
振动测试
rough set
screwed connection
vibration test
