摘要
介绍了经验模态分解法EMD和传统时域幅值5种参数的定义。对某一简支梁模型,利用振动系统采集振动响应信号,应用EMD和时域幅值参数相结合的方法,很好地判别了简支梁的损伤位置。在不同损伤程度的情况下,通过EMD分解,计算各时域幅值参数的变化率,从而较好地识别出了损伤的程度。损伤程度的识别中,脉冲指标效果最好,其次为裕度指标和峭度指标。
The conception of Empirical Mode Decomposition (EMD) and five parameters in the traditional time-domain-amplitude are introduced simply in this paper. Response signal of a simply supported beam model is collected by vibrating system, and the data are analyzed by combining EMD with parameters in time domain amplitude, so the damage location is identified well. In different situations of damage, parameters in time -domain-amplitude are accounted by EMD, the damage degree is identified. In the course of identi...
出处
《无损检测》
北大核心
2008年第2期84-86,共3页
Nondestructive Testing
关键词
经验模态分解
时域幅值参数
损伤位置
损伤程度
Empirical mode decomposition
Parameters in time-domain-amplitude
Damage location
Damage degree
