Publications by authors named "Kian Sepahvand"
Article Synopsis
- The study explores a method for identifying variations in stiffness within structures through non-destructive techniques, using simulated responses from a cantilever beam under static and dynamic loading.
- Bayesian inference and Karhunen-Loève expansions are employed to analyze stiffness randomness and measurement noise, leading to a new method that leverages resonance frequencies.
- Results indicate that static analysis generally offers better accuracy than modal analysis, though accuracy may vary based on location along the beam, while static procedures result in lower errors compared to dynamic approaches when considering noise levels.
Contactless transportation systems based on near-field acoustic levitation have the benefit of compact design and easy control which are able to meet the cleanliness and precision demands required in precision manufacturing. However, the problems involved in contactless positioning and transporting cylindrical objects have not yet been addressed. This paper introduces a contactless transportation system for cylindrical objects based on grooved radiators.
View Article and Find Full Text PDFThe instability of a floating object is the main factor preventing near-field acoustic levitation (NAFL) from being widely used in the manufacture of micro-electro-mechanical systems. Therefore, investigating the restoring force due to the generation mechanisms of NAFL is necessary to ensure the stable levitation of the floating object. This study presents a theoretical analysis to evaluate the restoring force based on the gas-film-lubrication theory.
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