Results 41 to 50 of about 47,269 (302)

Aeroelastic stability analysis of rotor blade with complex three-dimensional design

Xibei Gongye Daxue Xuebao, 2023
A rotor dynamic analysis method for the complex three-dimensional design blade was developed and applied to analyzing its aeroelastic stability. Based on the medium-size deformation beam theory and Hamilton principle, the joint transfer matrix was used ...
DENG Jinghui, YU Zhihao, ZHOU Yun, SONG Bin   +3 more
doaj   +1 more source

Modal identification of high earth-rock dams based on seismic records and SSI method

Yantu gongcheng xuebao, 2021
Using the measured seismic records to identify the modal parameters of high earth-rock dams is a feasible way to study the dynamic characteristics of dams.
WANG Mao-hua 1, 2, CHI Shi-chun 1, 2, ZHOU Xiong-xiong 3
doaj   +1 more source

Optimal integral force feedback and structured PI tracking control : application for objective lens positioner [PDF]

, 2014
Peer ...
Aphale, Sumeet S, Fleming, Andrew J, Russell, Douglas, Teo, Yik R   +3 more
core   +1 more source

TMD Damping for Structures with Uncertain Modal Parameters

Applied Sciences
The optimum tuning of the natural frequency and damping ratio of TMDs for structural modal parameters and various optimization criteria are well-known from the literature.
Felix Weber
doaj   +1 more source

Spectrum-to-spectrum methods for the generation of elastic floor acceleration spectra [PDF]

, 2017
In seismic codes, the acceleration demand of nonstructural components is commonly expressed in terms of floor response spectra and estimated by means of simple predictive equations.
FRANCHIN, Paolo, LUCCHINI, Andrea, MOLLAIOLI, Fabrizio   +2 more
core   +1 more source

OMA analysis of a launcher under operational conditions with time-varying properties [PDF]

, 2018
The objective of the paper is the investigation of the capability of Operational Modal Analysis approaches to deal with time-varying system in the low-frequency domain.
Coppotelli, Giuliano, Eugeni, Marco, Gaudenzi, Paolo, Mastroddi, Franco, Muller, Stephane, Troclet, Bernard   +5 more
core   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Topology Optimization of Constrained Layer Damping on Plates Using Method of Moving Asymptote (MMA) Approach

Shock and Vibration, 2011
Damping treatments have been extensively used as a powerful means to damp out structural resonant vibrations. Usually, damping materials are fully covered on the surface of plates.
Zheng Ling, Xie Ronglu, Wang Yi, Adel El-Sabbagh   +3 more
doaj   +1 more source

Operational modal analysis of a spar-type floating platform using frequency domain decomposition method [PDF]

, 2016
System identification of offshore floating platforms is usually performed by testing small-scale models in wave tanks, where controlled conditions, such as still water for free decay tests, regular and irregular wave loading can be represented.
Arena, Felice, Collu, Maurizio, Failla, Giuseppe, Fiamma, Vincenzo, Nava, Vincenzo, Ruzzo, Carlo   +5 more
core   +3 more sources

Evaluating Energy Absorption Performance of Filled Lattice Structures

Advanced Engineering Materials, EarlyView.
Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney, William P. King, Iwona Jasiuk   +2 more
wiley   +1 more source