Harkness, P., Cardoni, A., Russell, J., and Lucas, M. (2010) Designing a hollow bolted Langevin transducer for ultrasonic coring. In: International Conference on Advances in Experimental Mechanics, 7-9 Sep 2010, Liverpool, UK.
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A number of architectures for a hollow Langevin ultrasonic transducer are proposed and evaluated. One of these is optimised by finite element modelling and is then manufactured and analysed experimentally. The preload on the transducer ceramics is increased and the effect on the performance is measured. At maximum preload the results of an experimental modal analysis are used to determine the natural frequency and response of both the operating longitudinal mode and unwanted bending modes. The performance of the hollow transducer is compared to a solid commercial transducer containing the same volume of piezoceramic material. The efficiency is shown to be comparable. Higher ultrasonic displacement amplitudes are achieved with the hollow transducer although a lower Q-factor is found.
|Item Type:||Conference Proceedings|
|Additional Information:||Paper also appears in Applied Mechanics and Materials, Vol. 22-24, pp. 65-70, 2010.|
|Glasgow Author(s):||Cardoni, Dr Andrea and Lucas, Prof Margaret and Harkness, Dr Patrick|
|Authors:||Harkness, P., Cardoni, A., Russell, J., and Lucas, M.|
|Subjects:||T Technology > TJ Mechanical engineering and machinery|
|College/School:||College of Science and Engineering > School of Engineering > Systems Power and Energy|
|Journal Name:||Applied Mechanics and Materials|
|Publisher:||Trans Tech Publications|
|Published Online:||June 2010|