Abstract: This work is to study parametric vibration of a dualring structure through analytical and numerical methods by focusing on the relationships between basic parameters and parametric instability. An elastic dualring model ...

Abstract: The inplane wave motion is analytically examined to address the stationary deflection, natural frequency splitting, and mode contamination of the rotationally ringshaped periodic structures (RRPS). The governing equation ...

Abstract: In-plane vibration of cyclically symmetric ring structures is examined with emphasis on the comparison of instabilities estimated by complete and simplified models. The aim of this paper is to understand under what conditions ...

Abstract: The phasing effect of the slot/magnet combination on rigidelastic vibration is addressed by incorporating the cyclic symmetry of permanent magnet (PM) motors. Expanding research is also carried out to achieve more general ...

Abstract: Permanent magnet (PM) induced vibration is one of the major concerns for PM motors. This work aims at the identification and suppression of the vibration source from magnetic field distortions caused by magnet/slot ...

Abstract: Radiosonde data are a valuable resource in the detection of climate change in the upper atmosphere. Long time series of stratospheric temperature data, carefully screened and corrected to remove errors, are available for ...