Electromagnetic Acoustic Transducer Analysis Год выпуска: 2011Автор: Reza JafariИздательство: LAP Lambert Academic PublishingСтраниц: 164ISBN: 9783846532706Описание Electromagnetic acoustic transducers (EMATs) are non-contact, non-destructive testing devices for conducting specimens. The efficiency of EMATs is inherently low and methods for increasing it have been the subject of intense research. In publications, the finite element (FE) technique has been applied to the diffusion equation in order to model EMATs. However, electromagnetic theory indicates that the diffusion equation must be solved for the magnetic vector potential (MVP) in conjunction with an equation for the total current. An existing FE formulation considering the two equations becomes unstable when modeling transient inputs in EMAT transmitters. The limitation posed by the instability prompted the development of an improved FE formulation, which solves the two equations and is suitable for the modeling of EMATs.The objective of the research work described in this thesis is to properly and accurately model EMATs, so that their efficiency could be improved at the design...
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Юлия, 01.12 Юлечка, Привет! Пишу с огромной благодарностью.)) Диплом защитила блестяще.)) Как Вы меня выручили! в ситуации, в которой я оказалась этим летом, и всеми вытекающими - сама бы я не написала никогда нормальную работу. Спасибо Вам! Комиссия мучала мучала, но поскольку работа все таки была написана и структурирована хорошо, мною изучена и перелопачена - мне вынесли вердикт: блестяще.))))) Юль, хотелось бы отправить Вам небольшой сувенир, если позволите.)) В благодарность за ум, честность, за Вашу порядочность и помощь.)) Напишите пожалуйста, на какой адрес Дед мороз может доставить пакетик? Вы же в Питере? пишите.)) я очень жду.))) Спасибо еще раз огромное.))
