Experiment on loose monitoring of bolt connection state based on pressure resistance method
-
摘要: 对螺栓连接部位的螺母进行测试，将精密阻抗仪黏附在螺母外侧的压电材料上来测试电导纳信号，对得到的压电材料的电导纳谱峰值频率和螺栓预紧力之间的变化规律进行分析。根据测试得到的压电材料阻抗峰值频率来监测螺栓的连接状态。试验时，所有预紧力条件下导纳峰值频率都发生了右移的现象，根据峰值频率可以得到螺栓预紧力，从而推断出螺栓的连接情况。当预紧力载荷上升后，压电材料的刚度将提高，压电材料与螺母耦合后将形成更大的谐振频率。Abstract: The test was carried out on the nut at the connecting part of the butterfly bolt. The precision impedance meter was adhered to the piezoelectric material on the outside of the nut to realize the function of testing the electrical admittance signal. The variation law between the peak rate of piezoelectric admittance spectrum and the bolt pre-tightening force was analyzed, and then the connection state of the bolt was monitored according to the peak impedance frequency of the piezoelectric material. The peak frequency of admittance shifted to the right under all preload conditions. According to the peak frequency, the bolt neck tightening force can be obtained, so as to infer the bolt connection situation. When the preload increases, the stiffness of the piezoelectric material will increase, and the piezoelectric material will form a larger resonance frequency after coupling with the butterfly mother.
-
-
[1] 徐春广,李骁,潘勤学,等.螺栓拉应力超声无损检测方法[J].应用声学,2014,33(2):102-106. [2] 周天翔,许斌,李贺,等.基于压电材料的钢筋砼-钢组合塔筒损伤监测[J].压电与声光,2016,3(6):961-964. [3] 崔俊,王秋良.小波包和功率谱密度分析法在混凝土龄期强度监测中的应用[J].传感技术学报,2017,30(7):1131-1138. [4] 王涛,刘绍鹏,李川,等.基于压电时间反演法的螺栓松动检测研究[J].传感技术学报,2015(12):1795-1799. [5] YIN H, WANG T, YANG D, et al. A smart washer for bit loos monitering based on pietnc active sensing methol[J]. Applied Science,2016,6(11):320-326.
[6] 王丹生,朱宏平,鲁晶品,等.基于压电导纳的钢框架螺栓松动检测试验研究[J].振动与冲击,2007,26(10):157-160. [7] 沈星,吕娟,章建义,等.基于压电阻抗技术和BP网络的结构健康监测[J].南京航空航天大学学报,2010,42(4):418-422. [8] 叶亮,张有忧,T克勤,等.精于压电阻抗法的机械蝶栓组松动监测及识别[J].科学技术与工程,2013,13(18):5172-5176. [9] 王涛,杨志武,邵俊华,等.基于压电阻抗技术的螺栓松动检测试验研究[J].传感技术学报,2014(10):1321-1325. [10] 温家宇,许斌,王海东.组合结构空洞缺陷检测压电阻抗数值模拟研究[J].压电与声光,2018,40(2):276-279. [11] 张军,黎俊楠,李宪华,等.基于EMI与ANN技术的声波信号探测机理研究[J].舰船科学技术,2017,39(17):138-141. [12] 张玉祥,张鑫,陈家照,等.基于压电阻抗法的结构损伤检测技术进展[J].无损检测,2016,38(1):69-74. [13] 叶亮,张有忱,丁克勤,等.基于压电阻抗法的机械螺栓组松动监测及识别[J].科学技术与工程,2013,13(18):5172-5176. [14] 李继承,林莉,孟丽娟,等.激励电压对压电阻抗法检测灵敏度的影响[J].振动测试与诊断,2013,33(3):421-425. [15] 宋焕宇,王广辉.压电阻抗法检测管道腐蚀损伤的实验研究[J].南阳理工学院学报,2012,4(6):82-85,94.
计量
- 文章访问数: 0
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
