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The Study of Acoustic Emission Characteristics of Bolted Joint Structure in Vibration Environment
Author(s): 
Pages: 34-38
Year: Issue:  1
Journal: Journal of Southwest University of Science and Technology

Abstract: 振动环境中螺栓连接结构会发生碰摩现象,产生声发射信号.利用振铃计数率与能量等特征参数对声发射检测信号进行时域分析,结果表明:频率与加速度的改变都可以引起振铃计数率和能量的变化,振铃计数率和能量均随振动台加速度以及频率的提高而提高;螺栓连接结构在碰摩作用下产生出的能量与施加给螺栓的预紧扭矩的取值呈现一定的规律性:当预紧扭矩小于10 Nm时,能量随预紧扭矩的增加而减少;预紧扭矩等于10 Nm,产生的能...
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