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On the rotational motion of NEAs during close encounters with the Earth
(2020-05-01)
During their lifetime, the Near-Earth Asteroids (NEAs) suffer numerous close encounters (CE) with Earth, Mars and Venus. It has been demonstrated that gravitational interactions during close planetary encounters can alter ...
Data-driven identification of rotating machines using ARMA deterministic parameter evolution in the angle/time domain
(2020-09-01)
The functional-series angle-/time-varying autoregressive moving-average (AT-FS-ARMA) model was used to model and analyze vibration-based signals from internal combustion engines. This approach is derived from the formulation ...
Evolutionary models of rotating low mass stars
(Universidade Federal de Minas GeraisUFMG, 1999-11-29)
We have investigated the combined effects of rotation and internal ngular momentum redistribution on the structure and evolution of low mass tars, from the pre-main sequence to the main sequence phase. As a tool for that ...
A nonlinear model for multilayered rubber isolators based on a co-rotational formulation
(2017)
This article proposes a geometrically nonlinear co-rotational model aimed to characterize the mechanical behavior of elastomeric seismic isolators. The model is able to capture the axial and lateral coupling in both axial ...
Rotating helical turbulence. I. Global evolution and spectral behavior
(American Institute of Physics, 2010-03)
We present results from two 15363 direct numerical simulations of rotating turbulence where both energy and helicity are injected into the flow by an external forcing. The dual cascade of energy and helicity toward smaller ...
Design and Evaluation of a Research-Educational Test Bench Applied to Rotor Dynamics Studies
(Ieee-inst Electrical Electronics Engineers Inc, 2018-08-01)
The rotor dynamics study is critical in the design of rotating machinery. The dynamic modeling of rotors aims to estimate the operating condition of rotating machinery through the evaluation of parameters related to the ...
Design and evaluation of a research-educational test bench applied to rotor dynamics studies
(2018-08-01)
The rotor dynamics study is critical in the design of rotating machinery. The dynamic modeling of rotors aims to estimate the operating condition of rotating machinery through the evaluation of parameters related to the ...
Three different guises for the dynamics of a rotating beamThree different guises for the dynamic of a rotating beam
(Academic Press Ltd - Elsevier Science Ltd, 2011-10-24)
The dynamics of a flexible beam forced by a prescribed rotation around an axis perpendicular to its plane is addressed. Three approaches are considered, two of them related with simplified theories, within Strength of ...