RSS 1.0Departamento de Engenharia Mecânica
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Influence of the valve-seat gap on the dynamics of reed type valves
Moimás, Gabriel Biancolin
; Abrego, André Luís Severino ; Bueno, Douglas Domingues ; Gasche, José Luiz (International Journal of Refrigeration, 2020) [Artigo]
One of the main parts of refrigeration compressors is the automatic valve system used to control the suction and discharge processes. Experimental studies of these processes in the compressor environment are complex because ... -
Determination, Validation, and Dynamic Analysis of an Off-Road Chassis
de Moraes, Mateus Coutinho; Menezes, Miguel Ângelo (Advanced Structured Materials, 2020) [Capítulo de livro]
The chassis of a car can be interpreted as a large spring connecting the rear and the front suspension. A flexible chassis adds another spring to an already complex system being difficult to control the handling and ... -
Application of pulsed laser ND: YAG in superduplex steel uns S 32750: Autogenous laser welding, laser welding with refusion process by laser and hybrid welding (laser/Gtaw)
Da Silva Crespo, Gillian; Moraes e Videira, Arthur ; Ventrella, Vicente Afonso (Nd:YAG Lasers: Technology and Applications, 2020) [Capítulo de livro]
The families of duplex and superduplex steels were developed to serve sectors that demand steels with extreme mechanical capacity and good corrosion resistance. Such characteristics are due to their structure being composed ... -
Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs
; ; Salviano, Leandro O.; (Solar Energy, 2020) [Artigo]
Surrogate-based optimization is employed to maximize the thermo-hydraulic performance of a solar air heater duct with non-periodic rows of rectangular winglet pairs mounted in the absorber plate. The present optimization ... -
Combining active control and synchrophasing for vibration isolation of a floating raft system: An experimental demonstration
; ; ; ; ; Brennan, Michael J (Journal of Low Frequency Noise Vibration and Active Control, 2020) [Artigo]
Vibration isolation of a floating raft system typically found in a marine application is of concern in this paper. Housed on the raft are electrical motors each driving two counter rotating shafts with eccentric masses ... -
A strategy to suppress limit cycle oscillations in helicopter ground resonance including landing gear nonlinearities
; Bueno, Douglas Domingues; de Abreu, Gustavo L.C.M. (Aerospace Science and Technology, 2020) [Artigo]
Ground Resonance (GR) in helicopters is a potentially dynamic instability commonly involving the coalescence of the blade lag mode with the fuselage motion. Linear techniques can be employed to identify the unstable rotor ... -
Inverted Pendulum Nonlinear Controllers Using Two Reaction Wheels: Design and Implementation
Trentin, João Francisco Silva; Da Silva, Samuel ; De Souza Ribeiro, Jean Marcos ; (IEEE Access, 2020) [Artigo]
Reaction wheels have been extensively used to control and stabilize a wide range of applications due to the angular momentum exchange that they provide to mechanical systems. However, there exist several limitations ... -
Some practical regards on the application of the harmonic balance method for hysteresis models
Miguel, Luccas Pereira; Teloli, Rafael de Oliveira ; da Silva, Samuel (Mechanical Systems and Signal Processing, 2020) [Artigo]
Describing hysteretic systems with a closed-form solution is a challenging task due to some pitfalls regarding the non-smooth and memory effect mechanisms that do not permit, for example, to apply conventional frequency ... -
Planning and construction of mechanism for surface wear testing and fault analysis in quadril joint prosthetic tribosystem
Ribeiro, Rubens; Gonçalves, Aparecido Carlos ; da Consolação Fonseca de Albuquerque, Maria (International Journal of Advanced Manufacturing Technology, 2020) [Artigo]
The problems associated with prosthetic failures and revision surgeries have increased greatly since total joint replacement has also been applied to younger and more active patients, so the need to resolve or reduce ... -
Pool boiling heat transfer of HFE-7100 on metal foams
Manetti, Leonardo Lachi; ; de Souza, Reinaldo Rodrigues ; Cardoso, Elaine Maria (Experimental Thermal and Fluid Science, 2020) [Artigo]
The search for new techniques to increase boiling heat transfer has been driven by more efficient and compact heat exchangers, especially in microelectronics and equipment with high thermal loads. Two-phase cooling systems ... -
On the controllers' design to stabilize ground resonance helicopter
Ignácio da Silva, José A.; Bueno, Douglas D. ; de Abreu, Gustavo L. C. M. (JVC/Journal of Vibration and Control, 2019) [Artigo]
Ground resonance (GR) in helicopters is a potentially catastrophic instability commonly caused by coalescence of the regressive cyclic blade lag mode with the fuselage motion in certain rotor speed ranges. It can limit the ... -
On the detection of a nonlinear damage in an uncertain nonlinear beam using stochastic Volterra series
Villani, Luis GG; da Silva, Samuel ; ; (Structural Health Monitoring, 2020) [Artigo]
In the present work, two issues that can complicate a damage detection process are considered: the uncertainties and the intrinsically nonlinear behavior. To deal with these issues, a stochastic version of the Volterra ... -
Damage diagnosis in an isotropic structure using an artificial immune system algorithm
Oliveira, Daniela C.; Chavarette, Fábio R. ; Lopes, Mara L. M. (Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2019) [Artigo]
This work proposes a recent methodology for developing structural health monitoring based on intelligent computing techniques, with the purpose of detecting structural damages in aircrafts using artificial immune systems ... -
Effect of copper foam thickness on pool boiling heat transfer of HFE-7100
Manetti, Leonardo Lachi; ; ; Cardoso, Elaine Maria (International Journal of Heat and Mass Transfer, 2020) [Artigo]
Pool boiling is a low-cost technique for cooling electronic devices; HFE-7100 is a dielectric fluid with advantageous properties for such application but its high wettability can cause temperature overshoot in the system. ... -
Modulation in phase and frequency of neural oscillations during epileptiform activity induced by neonatal Zika virus infection in mice
; ; ; Brogin, Joao A. Ferres; Bueno, Douglas D. ; ; ; ; ; et al. (Scientific Reports, 2020) [Artigo]
Modulation of brain activity is one of the main mechanisms capable of demonstrating the synchronization dynamics of neural oscillations. In epilepsy, modulation is a key concept since seizures essentially result from neural ... -
Influence of friction and asymmetric freeplay on the limit cycle oscillation in aeroelastic system: An extended Henon's technique to temporal integration
Wayhs-Lopes, Larissa Drews; ; Bueno, Douglas D. (Journal Of Fluids And Structures, 2020) [Artigo]
Nonlinear effects such as friction and freeplay on the control surfaces can affect aeroelastic dynamics during flight. In particular, these nonlinearities can induce limit cycle oscillations (LCO), changing the system ... -
Prognosis and fail detection in a dynamic rotor using artificial immunological system
; Chavarette, Fabio Roberto; ; Goncalves, Aparecido C. ; Roefero, Luiz G. P. ; Moro, Thiago C. (Engineering Computations, 2020) [Artigo]
Purpose In recent years, the mechanical industries began to apply many investments in research and technological development to obtain efficient methods to analyze the integrity of structures and prevent disasters and/or ... -
An Alternative Approach to Substructuring in Vibratory Systems Containing Soft Rubber Isolators
; Brennan, Michael John (Journal Of Vibration And Acoustics-transactions Of The Asme, 2019) [Artigo]
Built-up structures, such as airplanes, ships, and even refrigeration systems, which have many components, can be substructured to speed up and facilitate the process of calculating the vibratory response of the complete ... -
Numerical Study of a Single-Sided Vibro-Impact Track Nonlinear Energy Sink Considering Horizontal and Vertical Dynamics
; ; ; ; Brennan, Michael J. (Journal Of Vibration And Acoustics-transactions Of The Asme, 2019) [Artigo]
In this paper, the single-sided vibro-impact track nonlinear energy sink (SSVI track NES) is studied. The SSVI track NES, which is attached to a primary structure, has nonlinear behavior caused by the NES mass moving on a ... -
Enhanced use practices in SSVEP-based BCIs using an analytical approach of canonical correlation analysis
Ferres Brogin, Joao Angelo; ; Bueno, Douglas Domingues (Biomedical Signal Processing And Control, 2020) [Artigo]
The search for a better understanding of the brain's anatomy and its functions on human actions has been a harsh yet very useful task, especially for brain-computer interface (BCI) engineering applications and medical ...