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Image-based bolt-loosening detection using an improved homography-based perspective rectification method
In this paper, a new perspective rectification method for image of bolts in flange joint is proposed and the image-based bolt-loosening detection...
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A Phenomenological Model for Bolt Loosening Characteristics in Bolted Joints Under Cyclic Loading
This paper discusses the bolt-loosening response subject to transverse cyclic loading and its analogy to metal fatigue behavior. A quantitative model...
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CNN-based bolt loosening identification framework for prefabricated large-span spatial structures
Large-span spatial structures have closely spaced frequencies and complex vibration modes. Traditional methods based on frequency domain parameters...
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Bolt Loosening Localization at Flange Joints Using Wind-Induced Response for High-Rise Tower
Under long term wind load, the bolt looseness occurring at the joints of tower legs will reduce the wind-resistant capability, increasing the...
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Assembly tightness detection of bolt connections using gray-level images with high-order cumulants
Bolt connections are widely used in aero-engine rotors and gas turbines because of their load-transferring and detachable characteristics. However,...
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Data-driven machine learning for pattern recognition and detection of loosening torque in bolted joints
One of the primary challenges associated with bolts, frequently used in assembly structures and systems, is the issue of torque loosening. This...
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A New Benchmark Problem for Structural Damage Detection: Bolt Loosening Tests on a Large-Scale Laboratory Structure
Monitoring the structural performance of engineering structures has always been pertinent for maintaining structural health and assessing the life...
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Highly Sensitive Low-Energy Laser Sensing Based on Sweep Pulse Excitation for Bolt Loosening Diagnosis
The hammering method used by inspectors is generally applied to inspection of looseness of bolted parts. This method entails active sensing through...
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A Review on the Bolted Flange Looseness Detection Method
Early detection of bolted flange looseness in oil and gas industries is vital, as it may lead to severe problems such as leakage and explosion. The...
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An Efficient Approach for Detecting Bolt Loosening in Periodically Supported Structures
Periodic structures consist of a large number of repeated units, which are joined together in an identical manner to form the whole system. It has...
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Analysis and prediction of wind turbine bolts based on GPR method
With the variance of preload and vibration in working conditions, wind turbine bolt loosening is difficult to predict accurately. To address the...
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A Novel Unsupervised Deep Learning Method with a Convolutional Neural Network for Structural Damage Detection
A novel data-driven structural damage detection approach using an unsupervised convolutional neural network is proposed in this study to assess the...
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Analysis of load characteristics of wind turbine blade root bolts under loosened and fractured conditions
The loosening and fracture of the blade root bolt, a crucial link between the blade and hub, significantly affect the wind turbine's safe operation....
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State Detection System for Cam Lock Using YOLOv5
Due to the large number of parts and components inside the subway car, the cost of manual maintenance is high. In order to automatically detect...
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Regression Method for Rail Fastener Tightness Based on Center-Line Projection Distance Feature and Neural Network
In the railway system, fasteners have the functions of dam**, maintaining the track distance, and adjusting the track level. Therefore, routine...
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A Modified Time Reversal Method for Guided Wave Based Bolt Loosening Monitoring in a Lap Joint
Loss of preload in pretensioned bolts is inevitable. Reliable monitoring of bolt preload is significant to ensure structural reliability and safety....
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Research on double-sided detection method of bolt looseness based on machine vision
As the key connecting parts at the bottom of the train, bolt looseness has a crucial impact on the safe operation of the train. Among the current...
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Concept of radial slippage propagation triggering self-loosening and optimisation design of novel anti-loosening structures
Self-loosening of bolted joints can occur in a vibration environment, and it may induce bolt fatigue fracture with catastrophic consequences. It is...
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Damage detection of flange bolts in wind turbine towers using dynamic strain responses
With the development of wind power industry, the adoption of the wind turbine has achieved continuous growth over the years. As the key component to...
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Detection of Damage in Bolted Steel Structures Using Vibration Signature Analysis
PurposeIn bolted steel structures, the damage is mostly seen due to loss of prestress in the bolts. Studies say that the loosened bolts can be...
