基于结构界面波能损耗的螺栓联接结构健康监测

发布时间：2018-06-23 15:22

本文选题：螺栓联接 + 超声检测　；参考：《机械设计与制造》2017年06期

【摘要】：针对工程实际中的螺栓松动问题,基于压电陶瓷片激发的超声波通过粗糙接触界面后的能量损耗变化与螺栓预紧力的关系,提出了一种螺栓联接结构压电主动式健康监测的方法。通过有限元法模拟了超声波通过螺栓联接界面的传播过程,分析了超声波通过联接界面后的波能损耗变化,并进行实验验证。结果表明:随着预紧力的增加,超声波通过联接界面后的波能损耗减小,波能损耗与预紧力呈单调变化关系。利用该性质监测螺栓联接松动具有很好的应用前景。
[Abstract]:Aiming at the problem of bolt loosening in engineering practice, based on the relationship between the change of energy loss and bolt pre-tightening force after the ultrasonic wave excited by piezoelectric ceramic plate passes through the rough contact interface, A method of active piezoelectric health monitoring for bolted structure is presented. The propagation process of ultrasonic wave through the bolted interface is simulated by finite element method. The wave energy loss changes after the ultrasonic passing through the interface are analyzed and verified by experiments. The results show that with the increase of pretightening force, the wave energy loss decreases after the ultrasonic wave passes through the interface, and the wave energy loss changes monotonously with the pretightening force. Using this property to monitor bolt joint loosening has a good application prospect.
【作者单位】：武汉科技大学冶金装备及控制教育部重点实验室;
【基金】：国家自然科学基金(51375354,51278084)
【分类号】：TH131.3

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