Results 81 to 90 of about 129,213 (353)

THE EFFECT OF LONGITUDINAL VIBRATION ON LAMINAR FORCED CONVECTION HEAT TRANSFER IN A HORIZONTAL TUBE

open access: yesJournal of Engineering, 2006
The effect of longitudinal vibration on the laminar forced convection heat transfer in a horizontal tube was studied in the present work. The flow investigated is an internal, laminar, incompressible, developing, steady and oscillatory flow.
Manal H. AL-Hafidh, Ali Mohsen Rishem
doaj   +1 more source

Four New Capabilities in NASTRAN for Dynamic and Aeroelastic Analyses of Rotating Cyclic Structures [PDF]

open access: yes, 1984
Static aerothermoelastic design/analysis of axial-flow compressors, modal flutter analysis of axial-flow turbomachines, forced vibration analysis of rotating cyclic structures and modal flutter analysis of advanced turbopropellers with highly swept ...
Elchuri, V., Gallo, A. M.
core   +1 more source

Active vibration control (AVC) of a satellite boom structure using optimally positioned stacked piezoelectric actuators

open access: yes, 2006
In this paper, results for active vibration control predicted from experimental measurements on a lightweight structure are compared with purely computational predictions.
Anthony, D.K.   +5 more
core   +1 more source

Enhanced vibrational energy harvesting using non-linear stochastic resonance [PDF]

open access: yes, 2008
Stochastic resonance has seen wide application in the physical sciences as a tool to understand weak signal amplification by noise. However, this apparently counter- intuitive phenomenon does not appear to have been exploited as a tool to enhance ...
Almog   +18 more
core   +1 more source

Three‐dimensional Antimony Sulfide Based Flat Optics

open access: yesAdvanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang   +18 more
wiley   +1 more source

Modal analysis of bridge structures by means of forced vibration tests / Tilto konstrukcijų modalinė analizė taikant priverstinės vibracijos testus

open access: yesJournal of Civil Engineering and Management, 2011
New modern bridges and older structures exposed to accelerated deterioration need permanent condition monitoring. The major tools used in bridge condition evaluation are based on the results of the experimental modal analysis of bridge structures.
Jarosław Zwolski, Jan Bien
doaj   +1 more source

Development of an unsteady aerodynamics model to improve correlation of computed blade stresses with test data [PDF]

open access: yes, 1985
A reliable rotor aeroelastic analysis operational that correctly predicts the vibration levels for a helicopter is utilized to test various unsteady aerodynamics models with the objective of improving the correlation between test and theory.
Gangwani, S. T.
core   +1 more source

Space-time numerical simulation and validation of analytical predictions for nonlinear forced dynamics of suspended cables [PDF]

open access: yes, 2008
This paper presents space-time numerical simulation and validation of analytical predictions for the finite-amplitude forced dynamics of suspended cables.
Rega, Giuseppe, Srinil, Narakorn
core   +1 more source

Tuning the Electronic Structure and Spin State of Fe─N─C Catalysts Using an Axial Oxygen Ligand and Fe Clusters for High‐Efficiency Rechargeable Zinc–Air Batteries

open access: yesAdvanced Functional Materials, EarlyView.
A FeN4─O/Clu@NC‐0.1Ac catalyst containing atomically‐dispersed FeN4─O sites (medium‐spin Fe2+) and Fe clusters delivered a half‐wave potential of 0.89 V for ORR and an overpotential of 330 mV at 10 mA cm−2 for OER in 0.1 m KOH. When the catalyst was used in a rechargeable Zn–air battery, a power density of 284.5 mW cm−2 was achieved with excellent ...
Yongfang Zhou   +8 more
wiley   +1 more source

The influence of gyroscopic forces on the dynamic behavior and flutter of rotating blades [PDF]

open access: yes
The structural dynamics of a cantilever turbomachine blade mounted on a spinning and precessing rotor are investigated. Both stability and forced vibration are considered with a blade model that increases in complexity (and verisimilitude) from a spring ...
Chang, A. T., Sisto, F.
core   +1 more source

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