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Advances in Nano Research Volume 6, Number 4, December 2018 , pages 399-422 DOI: https://doi.org/10.12989/anr.2018.6.4.399 |
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Vibration analysis thermally affected viscoelastic nanosensors subjected to linear varying loads |
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Farzad Ebrahimi, Ramin Babaei and Gholam Reza Shaghaghi
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| Abstract | ||
| Unwanted vibration is an issue in many industrial systems, especially in nano-devices. There are many ways to compensate these unwanted vibrations based on the results of the past researches. Elastic medium and smart material etc. are effective methods to restrain unnecessary vibration. In this manuscript, dynamic analysis of viscoelastic nanosensor which is made of functionally graded (FGM) nanobeams is investigated. It is assumed that, the shaft is flexible. The system is modeled based on Timoshenko beam theory and also environmental condition, external linear varying loads and thermal loading effect are considered. The equations of motion are extracted by using energy method and Hamilton principle to describe the translational and shear deformation's behavior of the system. Governing equations of motion are extracted by supplementing Eringen's nonlocal theory. Finally vibration behavior of system especially the frequency of system is developed by implementation Semi-analytical differential transformed method (DTM). The results are validated in the researches that have been done in the past and shows good agreement with them. | ||
| Key Words | ||
| nanosensor; dynamic analysis; functionally graded material; viscoelastic material; linear varying loads; thermal loading effects; Eringen nonlocal theory | ||
| Address | ||
| Department of Mechanical Engineering, Faculty of Engineering, Imam Khomeini International University, Postal code: 3414916818, Qazvin, Iran. | ||