کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
510760 | 865788 | 2006 | 11 صفحه PDF | دانلود رایگان |
This work presents, for the first time, simple theoretical and finite element investigations of the use of shear-mode piezoceramics for shunted passive vibration damping, leading to the so-called shear-mode shunted damping (SSD). Hence, its impedance-based formulation is first presented, then a simple finite element approach is described for its numerical implementation. Finally, the resistive SSD performance is evaluated and assessed on beams against the classical resistive extension-mode shunted damping (ESD). Preliminary results for the first three modes of a vibrating aluminium beam with sandwiched (axially polarized) and surface-bonded (through-the-thickness polarized) piezoceramic patches indicate that: (i) the generalised electromechanical coupling coefficient (EMCC) for SSD is more than three times higher than for ESD; (ii) the added resistive SSD is more than twelve times the classical resistive ESD; (iii) the amplitude reduction due to the SSD is more than two times that due to ESD. The shunted damping can be used either alone, when low-to-medium damping is required, or combined with an active damping as a complementary or fail-safe passive vibration damping solution.
Journal: Computers & Structures - Volume 84, Issues 22–23, September 2006, Pages 1415–1425