{"title":"基于声振综合调制技术的多螺栓松动监测","authors":"Minghao Chen, Yanfeng Shen","doi":"10.1115/imece2021-70345","DOIUrl":null,"url":null,"abstract":"\n This paper proposed an integrated vibro-acoustic modulation method (IVAM) for multi-bolt loosening monitoring. Numerical simulations and experiments of a single bolt model are initially conducted to illuminate the contact acoustic nonlinearity (CAN) and vibro-acoustic modulation (VAM) phenomenon. The finite element model considers the coupled field effects and the contact interface of the bolted joint. A pumping wave with a certain low frequency combined with a probing signal sweeping through the frequency range of 50 kHz to 100 kHz was implemented and verified to effectively trigger VAM on the bolted connection. A comprehensive damage index (CDI) associated with the linear energy and nonlinear CAN change due to the bolt looseness is then proposed to evaluate bolt looseness in a full life cycle. For further study, IVAM is applied on a complex multi-bolt connection part to locate and identify the loosened bolts. Several cases are investigated to analyze its performance. An intelligent self-verification mechanism is used to ensure the accuracy of the results. The proposed IVAM method with an outcome CDI matrix possesses great application potential for multi-bolt connection monitoring with high sensitivity and accuracy. This paper finishes with summary, concluding remarks, and suggestions for future work.","PeriodicalId":23585,"journal":{"name":"Volume 7A: Dynamics, Vibration, and Control","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Multi-Bolt Loosening Monitoring Using an Integrated Vibro-Acoustic Modulation Technique\",\"authors\":\"Minghao Chen, Yanfeng Shen\",\"doi\":\"10.1115/imece2021-70345\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n This paper proposed an integrated vibro-acoustic modulation method (IVAM) for multi-bolt loosening monitoring. Numerical simulations and experiments of a single bolt model are initially conducted to illuminate the contact acoustic nonlinearity (CAN) and vibro-acoustic modulation (VAM) phenomenon. The finite element model considers the coupled field effects and the contact interface of the bolted joint. A pumping wave with a certain low frequency combined with a probing signal sweeping through the frequency range of 50 kHz to 100 kHz was implemented and verified to effectively trigger VAM on the bolted connection. A comprehensive damage index (CDI) associated with the linear energy and nonlinear CAN change due to the bolt looseness is then proposed to evaluate bolt looseness in a full life cycle. For further study, IVAM is applied on a complex multi-bolt connection part to locate and identify the loosened bolts. Several cases are investigated to analyze its performance. An intelligent self-verification mechanism is used to ensure the accuracy of the results. The proposed IVAM method with an outcome CDI matrix possesses great application potential for multi-bolt connection monitoring with high sensitivity and accuracy. This paper finishes with summary, concluding remarks, and suggestions for future work.\",\"PeriodicalId\":23585,\"journal\":{\"name\":\"Volume 7A: Dynamics, Vibration, and Control\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Volume 7A: Dynamics, Vibration, and Control\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1115/imece2021-70345\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Volume 7A: Dynamics, Vibration, and Control","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1115/imece2021-70345","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Multi-Bolt Loosening Monitoring Using an Integrated Vibro-Acoustic Modulation Technique
This paper proposed an integrated vibro-acoustic modulation method (IVAM) for multi-bolt loosening monitoring. Numerical simulations and experiments of a single bolt model are initially conducted to illuminate the contact acoustic nonlinearity (CAN) and vibro-acoustic modulation (VAM) phenomenon. The finite element model considers the coupled field effects and the contact interface of the bolted joint. A pumping wave with a certain low frequency combined with a probing signal sweeping through the frequency range of 50 kHz to 100 kHz was implemented and verified to effectively trigger VAM on the bolted connection. A comprehensive damage index (CDI) associated with the linear energy and nonlinear CAN change due to the bolt looseness is then proposed to evaluate bolt looseness in a full life cycle. For further study, IVAM is applied on a complex multi-bolt connection part to locate and identify the loosened bolts. Several cases are investigated to analyze its performance. An intelligent self-verification mechanism is used to ensure the accuracy of the results. The proposed IVAM method with an outcome CDI matrix possesses great application potential for multi-bolt connection monitoring with high sensitivity and accuracy. This paper finishes with summary, concluding remarks, and suggestions for future work.