Results 71 to 80 of about 1,536 (218)

A High Efficient Fluid-Structure Interaction Method for Flutter Analysis of Mistuned [PDF]

Xibei Gongye Daxue Xuebao, 2018
The time cost is very high by direct fluid-structure interaction method for mistuned bladed disk structures, so aerodynamic loads generally are ignored or treated as small perturbations in traditional flutter analysis.

doaj   +1 more source

Performance of a simplified strategy for formula constant optimisation in intraocular lens power calculation

Acta Ophthalmologica, Volume 103, Issue 1, Page e10-e18, February 2025.
Abstract Purpose To investigate the performance of a simple prediction scheme for the formula constants optimised for a mean refractive prediction error. Methods Analysis based on a dataset of 888 eyes before and after cataract surgery with IOL implantation (Hoya Vivinex).
Achim Langenbucher, Jascha Wendelstein, Nóra Szentmáry, Alan Cayless, Peter Hoffmann, Guillaume Debellmaniere, Damien Gatinel   +6 more
wiley   +1 more source

Development of an autonomous experimental system to identify BLISK mistuning [PDF]

, 2022
editorial reviewedThe one-piece assembly of bladed disks, named blade integrated disks (blisks), leads to more severe mistuning effects and reduced damping. An accurate mistuning identification methodology is thus necessary for the manufacturers to avoid
Ligot, Jérôme, Hoffait, Sébastien, Lengele, M., Mahy, P., de Cazenove, Jean, Denis, Sophie, Golinval, Jean-Claude   +6 more
core  

Ultra‐Low Noise Figure Ka‐Band MMIC LNA With Graded‐Channel GaN HEMTs

Electronics Letters, Volume 61, Issue 1, January/December 2025.
We report broadband (20 GHz ‐ 40 GHz) low‐noise amplifiers in a cascode topology using graded‐channel GaN HEMTs, resulting in an excellent NF figure down to 1 dB with 15 dB gain per stage. ABSTRACT We report broadband (20 GHz ‐ 40 GHz) low‐noise amplifiers in a cascode topology using graded‐channel GaN HEMTs, resulting in an excellent NF figure down to
Joe Tai, Joel Wong, Jeong‐Sun Moon
wiley   +1 more source

ANALYSIS OF THE WORST MISTUNING PATTERNS IN BLADED DISC ASSEMBLIES [PDF]

, 2020
In the paper, the problem of determining of the worst mistuning patterns is formulated and solved as an optimization problem. Maximum resonant amplitudes searched across the many nodes of a large-scale finite element model of a mistuned bladed disc and ...
Expo, Asme Proceedings Of, Turbo
core  

Effectiveness of Straight‐Wall and Sloped‐Wall House Hold Water Tank Acting as a Tuned Liquid Damper in Mitigating Structural Vibrations: A Dynamic Assessment

Advances in Civil Engineering, Volume 2025, Issue 1, 2025.
This research distinguishes the performance of three types of water tanks, which are acting as tuned liquid dampers (TLDs; i.e., rectangular shape flat‐bottom with straight wall, square shape flat‐bottom with straight‐wall, and square shape flat‐bottom with sloped‐wall tanks) in the same plan area firmly fixed to the upper most part of the G+7 framed ...
Badrinarayan Rath, T. R. Praveenkumar, Ayana Debela, Keerat Kumar Gupta, Bijaya Mohanti, Prabhu Paramasivam, Rupesh Gupta, Mitiku Adare Tufa, Arnab Biswas   +8 more
wiley   +1 more source

Experimental Investigation of Synchronous-Flow-Induced Blade Vibrations on a Radial Turbine

International Journal of Turbomachinery, Propulsion and Power
In this study, a thorough experimental investigation of the synchronous blade vibrations of a radial turbine is performed for different IGV configurations. First, the blade modes are measured experimentally and calculated numerically.
Marios Sasakaros, Markus Schafferus, Manfred Wirsum, Arthur Zobel, Damian Vogt, Alex Nakos, Bernd Beirow   +6 more
doaj   +1 more source

An Innovative Semiactive Rolling Tuned Mass Damper for Structural Vibration Mitigation

Structural Control and Health Monitoring, Volume 2025, Issue 1, 2025.
This study introduces a novel semiactive rolling tuned mass damper (SARTMD) developed to mitigate structural vibrations more efficiently than conventional tuned mass dampers (TMDs), with a primary objective of significantly reducing absorber mass without compromising performance.
Shayan Mazloom, Amir K. Ghorbani-Tanha, Andrea Del Grosso   +2 more
wiley   +1 more source

Influence of Aerodynamic Mistuning and Aerodynamic Coupling on Vibration Behavior of Mistuned Small Radial Turbine Wheels [PDF]

, 2017
The study at hand analyzes the influence of aerodynamic mistuning and aerodynamic coupling on the vibration behavior of mistuned small radial turbine wheels.
Dietmar Filsinger, Hemberger, David, Bauer, Hans Jörg, Filsinger, Dietmar, David Hemberger, Hans-Jörg Bauer   +5 more
core   +1 more source

Unsteady Aerodynamic Responses of Mistuned Cascade to Incoming Wakes. Mistuning of Stagger Angle.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1991
Unsteady aerodynamic responses of a mistuned cascade subjected to incoming wakes from an upstream cascade are investigated in this study, where the extended Nishiyama-Funazaki method is employed. Numerical calculations are made, focussing on the effects of stagger angle mistuning of the cascade. It is accordingly found that there is some possibility of
openaire   +3 more sources