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J0450403 Identification Accuracy Evaluation of Natural Frequency for Smart Washer by Adopting Variable Gain Type Adaptive Observer
The Proceedings of Mechanical Engineering Congress Japan
Bolted joints are widely used in mechanical and architectural structures . However , many serious accidents occur because of loosening in bolted joints , The diagnosis of the bolt loosening is able to be achieved by evaluating the variation of tightening axial tension . Conventionally , the inspection method of the loosening bolted joint is generally the measurement of the axial tension of a bolted joint by using ultrasonic waves . These methods require the use of special measurement equipmentdoi:10.1299/jsmemecj.2014._j0450403- fatcat:njaeum3i2bcgjc73ju4hzdmlk4