Research and Review Journal of Nondestructive Testing最新文献

Ultrasonic Testing Techniques for Integrity Assessment of Hydraulic Turbine Runner 用于水轮机转轮完整性评估的超声波测试技术

Research and Review Journal of Nondestructive Testing Pub Date : 2024-07-01 DOI: 10.58286/29989

M. E. Bajgholi, M. Viens, Gilles Rousseau, E. Ginzel, Denis Thibault, Martin Gagnon

{"title":"Ultrasonic Testing Techniques for Integrity Assessment of Hydraulic Turbine Runner","authors":"M. E. Bajgholi, M. Viens, Gilles Rousseau, E. Ginzel, Denis Thibault, Martin Gagnon","doi":"10.58286/29989","DOIUrl":"https://doi.org/10.58286/29989","url":null,"abstract":"\u0000Given the significance of minimizing energy production costs, ensuring continuous operation of power generation \u0000\u0000machinery is imperative. Hydro-Québec, a leading entity in power generation, employs predictive models to forecast \u0000\u0000the service life of its turbine runners to circumvent unplanned shutdowns. The reliability of these models heavily \u0000\u0000depends on accurately characterizing runner flaws, which constitutes a critical input. This necessitates the application \u0000\u0000of non-destructive testing (NDT) techniques for flaw characterization hence the need to evaluate the effectiveness of \u0000\u0000such methods and explore alternatives that could yield superior diagnostic results. This study aims to evaluate the \u0000\u0000efficacy of NDT methods especially ultrasonic techniques providing dependable flaw data (both experimental and \u0000\u0000simulation) to feed life and structural reliability estimation models. By refining the accuracy of these estimates, Hydro-Québec intends to reduce downtime, thereby lowering the costs associated with power generation. Despite \u0000\u0000considerable research in this domain, a gap remains in our understanding of flaw detectability, particularly in the \u0000\u0000welded joints of hydroelectric turbine runner blades. This extended investigation not only contributes to the \u0000\u0000advancement of predictive maintenance strategies but also supports operational efficiency and cost reduction in energy \u0000\u0000production.\u0000\u0000\u0000","PeriodicalId":495540,"journal":{"name":"Research and Review Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141707323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of Focal Spots of X-ray Tubes Using a CT Reconstruction Approach on Edge Images of Large Holes and Comparison to Pinhole Imaging 在大孔边缘图像上使用 CT 重构方法测量 X 射线管焦点并与针孔成像进行比较

Research and Review Journal of Nondestructive Testing Pub Date : 2024-06-01 DOI: 10.58286/29556

U. Zscherpel, Seyedreza Hashemi

引用次数: 0

Using the DIC Technique in Damage Detection for a Cantilevered Composite Beam 使用 DIC 技术检测悬臂复合梁的损坏情况

Research and Review Journal of Nondestructive Testing Pub Date : 2024-03-01 DOI: 10.58286/29389

Anna Rzepka, D. Ziaja

引用次数: 0

Noncontact measurement of bolt axial force during tightening processes using scattered laser ultrasonic waves 用散射激光超声波非接触测量螺栓拧紧过程中的轴向力

Research and Review Journal of Nondestructive Testing Pub Date : 2023-08-01 DOI: 10.58286/28211

So Kitazawa, Yong Lee, Rikesh Patel

{"title":"Noncontact measurement of bolt axial force during tightening processes using scattered laser ultrasonic waves","authors":"So Kitazawa, Yong Lee, Rikesh Patel","doi":"10.58286/28211","DOIUrl":"https://doi.org/10.58286/28211","url":null,"abstract":"This paper presents a new methodology for noncontact measurement of the axial force of bolts in their tightening processes using laser-generated ultrasound waves. This method employs ultrasound waves scattered in a bolt shaft to detect axial force changes, while most conventional ultrasonic methods use ultrasound waves propagating linearly along the bolt axis. The ultrasound waves in this study are generated by laser irradiation on the top surface of a bolt. Subsequently, they propagate deeply into the shaft and return towards the top of the bolt through complicated paths due to the multiple scattering in the bolt shaft. Finally, they are detected at the top surface using another laser and a speckle knife edge detector. With an examination based on the finite element analysis and verification experiments, it has been shown that the waveform of the scattered ultrasound shifts in time linearly with increasing the axial force. The time shifts were estimated using the cross-correlation analysis between the measured waveforms and the reference waveform with no axial force. This result demonstrates the feasibility of estimating the change in axial force during tightening processes once the relationship between the time shifts and axial force is obtained for the specific type of bolt to be used in products. Furthermore, the proposed technique does not require machining to flatten a bolt's head and the end, while conventional ultrasonic methods need the flattening procedures, enabling fast, cost-effective axial force measurement in mass production manufacturing processes.","PeriodicalId":495540,"journal":{"name":"Research and Review Journal of Nondestructive Testing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135872903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0