Results 281 to 290 of about 1,824,087 (309)

Mechanisms of force and power production in unsteady ricochetal brachiation

American Journal of Physical Anthropology, 2003
AbstractBrachiators travel by swinging beneath handholds, and it is not obvious how these animals manage to accelerate and decelerate in a horizontal direction, especially when moving rapidly. Most previous analyses focused on brachiation in highly constrained laboratory conditions that induced steady‐state locomotion.
James R, Usherwood, Susan G, Larson, John E A, Bertram   +2 more
openaire   +2 more sources

Unsteady forces on elongated bluff bodies

Physics of Fluids
The aerodynamic shape of the bluff body plays a significant role in determining the unsteady drag force resulting from the three-dimensional (3D) distortion of approaching free-stream turbulence. This paper conducted pressure measurements of bluff bodies with four different cross sections (square, rectangular, circular, elliptic, with different aspect ...
Shaopeng Li, Zhiyang Li, Qingshan Yang, Yan Jiang, Yuhang Wang, Hui Huang   +5 more
openaire   +1 more source

Model for Estimating Unsteady Force Derivatives

Journal of Aircraft, 2012
The estimation of the unsteady force derivatives through flight measurements is difficult to perform because the sensitivity of the force coefficients with respect to spin rate and time derivatives of the aerodynamic angles is smaller than the static variations of the aerodynamic coefficients.
openaire   +1 more source

The 3D Unsteady Aerodynamic Forces: The Forced Vibration of Bladed Discs

1998
The main problem for a bladed disc assembly under running conditions is the response levels when the excitation frequencies coincide natural frequencies of the structure during operation. Generally in the bladed analysis the excitation force are assumed in advance, although there are papers where these forces were calculated from the very simple flow ...
V. Gnesin, R. Rządkowski
openaire   +1 more source

Measurement of unsteady aerodynamic force on a galloping prism in a turbulent flow: A hybrid aeroelastic-pressure balance

Journal of Fluids and Structures, 2021
Chen Zengshun, Bub Ryur Kim
exaly  

Performance of forced unsteady diffusers

19th Aerospace Sciences Meeting, 1981
H. VIETS, M. BALL, D. BOUGINE
openaire   +1 more source

Forced internal unsteady aerodynamics

26th Aerospace Sciences Meeting, 1988
ERIC STEPHEN, JOHN WALKER, MICHAEL ROBINSON, RODOLFO LLOBET, BRUCE L   +4 more
openaire   +1 more source

Unsteady aerodynamic force modelling for 3-DoF-galloping of four-bundled conductors

Journal of Fluids and Structures, 2022
Tomomi Yagi, John Macdonald, Hisato Matsumiya   +2 more
exaly  

Functional data analysis of the force unsteadiness

Journal of Applied Physiology
Leandro Vinhas de Paula, Géssyca Tolomeu de Oliveira, Renato Melo Ferreira, Everton Rocha Soares   +3 more
openaire   +2 more sources

Modelling unsteady self-excited wind force on slender prisms in a turbulent flow

Engineering Structures, 2020
Chen Zengshun, Bub Ryur Kim
exaly