Results 11 to 20 of about 4,357 (257)

Three dimensional flutter analysis of a rectangular sheet based on the unsteady lifting surface theory and wind-tunnel experiments

Nihon Kikai Gakkai ronbunshu, 2016
This paper presents a three-dimensional flutter analysis of a rectangular sheet in an axial fluid flow. The unsteady fluid force acting on the sheet surface is calculated using Doublet-point method based on the unsteady lifting surface theory.
Masahiro WATANABE, Aki HASEGAWA, Kensuke HARA, Manuel GONZALEZ, Javier CUADRADO   +4 more
doaj   +5 more sources

Three dimensional flutter analysis and wind-tunnel experiments of slender webs in cross flow

Nihon Kikai Gakkai ronbunshu, 2017
This paper presents a three dimensional flutter analysis of slender webs under tension in cross flow. In the flutter analysis, Doublet-point method based on the unsteady lifting surface theory is used to calculate unsteady fluid force acting on the web ...
Keiichi HIROAKI, Nobuhito KAWAI, Masahiro WATANABE   +2 more
doaj   +3 more sources

Three dimensional flutter analysis and wind-tunnel experiments of a rectangular sheet supported by a wire (Influence of eccentricity on the flutter characteristics and occurrence condition)

Nihon Kikai Gakkai ronbunshu, 2016
This paper deals with the flutter analysis of a rectangular sheet supported by a wire in axial flow. In the flutter analysis, Doublet-Point Method based on unsteady lifting surface theory is used to calculate the unsteady fluid force acting on the sheet ...
Keiichi HIROAKI, Masahiro WATANABE
doaj   +3 more sources

FLUTTER ANALYSIS OF FLAT RECTANGULAR PANELS BASED ON THREE-DIMENSIONAL SUPERSONIC POTENTIAL FLOW [PDF]

AIAA Journal, 1963
Flutter analysis of flat rectangular panels based on three-dimensional supersonic unsteady potential ...
Cunningham, H. J.
openaire   +3 more sources

Research on Whirl‑Flutter Characteristics of Distributed Propulsive Rotorcraft

Nanjing Hangkong Hangtian Daxue Xuebao
Aiming at the problem of whirl-flutter dynamics of distributed propulsion rotorcraft in high-speed forward flight state， this paper proposes a highly versatile， fast and efficient distributed multi-rotor/tilt-wing coupled aeroelastic dynamics analysis ...
CHENG Yi, YU Zhihao, WANG Siwen, ZHAO Jinrui   +3 more
doaj   +2 more sources

A Two-Phase Monte Carlo Simulation/Non-Intrusive Polynomial Chaos (MSC/NIPC) Method for Quantification of Margins and Mixed Uncertainties (QMMU) in Flutter Analysis

IEEE Access, 2020
A two-phase Monte Carlo Simulation/Non-intrusive Polynomial Chaos (MCS/NIPC) method for quantification of margins and mixed uncertainties (aleatory and epistemic uncertainties) is proposed in this paper for the flutter speed boundary analysis.
Zhengwen Hu, Baoqiang Zhang, Jing Yang
doaj   +1 more source

A wind tunnel investigation of the unsteady aerodynamic characteristics of bionic flapping wings with three-dimensional complex motion

AIP Advances, 2023
The bionic flapping wing aircraft realizes flight by imitating the structure and flapping mode of birds. In this paper, a three-dimensional composite motion aerodynamic analysis model of a bionic flapping wing is established.
Lun Li, Wencheng Wang, Xiaojin Wu
doaj   +1 more source

Effect on the critical fluid velocity of a flutter by the spanwise dynamic characteristics of a cantilevered rectangular plate

Nihon Kikai Gakkai ronbunshu, 2020
The dynamic stability of rectangular flexible plate often becomes a problem. As the flexible plate, the papers in a high-speed printing machine, the thin plastic, the thin metal, the fluttering flag and the oscillating doom roof are enumerated.
Katsuhisa FUJITA, Satoshi KITANO, Ryohei KOZU, Tomoyoshi OMURA   +3 more
doaj   +1 more source

The Impact of Ischemia Assessed by Magnetic Resonance on Functional, Arrhythmic, and Imaging Features of Hypertrophic Cardiomyopathy

Frontiers in Cardiovascular Medicine, 2021
Aims: The aim of the study is to investigate the association between the degree of ischemia due to coronary microvascular dysfunction (CMD) and the left ventricular (LV) tissue characteristics, systolic performance, and clinical manifestations in ...
Sílvia Aguiar Rosa, Sílvia Aguiar Rosa, Sílvia Aguiar Rosa, Boban Thomas, António Fiarresga, Ana Luísa Papoila, Ana Luísa Papoila, Marta Alves, Marta Alves, Ricardo Pereira, Gonçalo Branco, Inês Cruz, Pedro Rio, Luis Baquero, Rui Cruz Ferreira, Miguel Mota Carmo, Luís Rocha Lopes, Luís Rocha Lopes, Luís Rocha Lopes   +18 more
doaj   +1 more source

Safety and effectiveness of a novel dielectric mapping system: one-year, two chinese centers experiences

BMC Cardiovascular Disorders, 2022
Background The KODEX-EPD system is a novel, dielectric three-dimensional mapping system. We aim to illustrate the feasibility, safety, and outcomes of ablation using the KODEX-EPD system.
Lei Ding, Xiao Huang, Cong Dai, Hongda Zhang, Sixian Weng, Fengyuan Yu, Yingjie Qi, Shu Zhang, Ruizheng Shi, Min Tang   +9 more
doaj   +1 more source