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Structural Engineering and Mechanics Volume 4, Number 2, March 1996 , pages 111-124 DOI: https://doi.org/10.12989/sem.1996.4.2.111 |
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Spatially filtered multi-field responses of piezothermoelastic cylindrical shell composites |
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Tzou HS, Bao Y
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| Abstract | ||
| New active \'\'intelligent\'\' structural systems with integrated self-sensing, diagnosis, and control capabilities can lead to a new design dimension for the next generation high-performance structures and mechanical systems. However, temperature effects to the piezoelectric transducers are not fully understood. This paper is concerned with a mathematical modeling and analysis of a laminated piezothermoelastic cylindrical shell composite exposed to mechanical, electric, and thermal fields. Generic shell equations and solution procedures are derived. Contributions of spatial and time components in the mechanical, electric, and temperature excitations are discussed and their analytical solutions derived. A laminated cylindrical shell composite with fully distributed piezoelectric layers is used in a case study; its multifield step and impulse responses are investigated. Analyses suggest that the fully distributed actuators are insensitive to even modes due to load averaging and cancellation. Accordingly, these even modes are filtered from the total response and only the modes that are combinations of m = 1, 3, 5, ... and n = 1, 3, 5, ... participating in dynamic response of the shell. | ||
| Key Words | ||
| piezoelectric transducers, smart structures, distributed control | ||
| Address | ||
| Tzou HS, UNIV KENTUCKY,CTR MFG SYST,DEPT MECH ENGN,LEXINGTON,KY 40506 | ||