Results 81 to 90 of about 6,615 (259)

Research of the Influence of Helicopter Power Transmission System on Rotor Shimmy Modal and Experimental Verification

Jixie chuandong, 2017
The torsional vibration dynamics analytical model of rotor power transmission system is built,the shimmy collectivity mode of vibration and frequency of rotor blade are obtained,it is indicated that the propulsion/transmission system will influence ...
Lai Lingyun, Zhang Ruochen, Liu Yongzhi
doaj  

Research on the Stability and Bifurcation Characteristics of a Landing Gear Shimming Dynamics System

Aerospace
A dynamic model is established to investigate the shimmy instability of a landing gear system, considering the influence of nonlinear damping. The stability criterion is utilized to determine the critical speed at which the landing gear system becomes ...
Shuang Ruan, Ming Zhang, Shaofei Yang, Xiaohang Hu, Hong Nie   +4 more
doaj   +1 more source

A new approximate model of tyre accounting for both deformed state and dry friction forces in the contact spot on the background of the coupled model

MATEC Web of Conferences, 2018
A new approximate model of the tire rolling accounting for coupled longitudinal and lateral sliding as well as the spinning and the deformed state resulting in elastic forces is proposed.
Kireenkov Alexey A., Nushtaev Dmitry V., Zhavoronok Sergey I.   +2 more
doaj   +1 more source

Parametric analysis of the stability of a bicycle taking into account geometrical, mass and compliance properties [PDF]

, 2017
Some studies of bicycle dynamics have applied the Whipple Carvallo bicycle model (WCBM) for the stability analysis. The WCBM is limited, since structural elements are assumed to be rigid bodies.
Doria, Alberto, Favaron, Valerio, Roa, Sergio, Taraborrelli, Luca   +3 more
core   +1 more source

Structural modeling of aircraft tires [PDF]

A theoretical and experimental investigation of the feasibility of determining the mechanical properties of aircraft tires from small-scale model tires was accomplished.
Clark, S. K., Dodge, R. N., Lackey, J. I., Nybakken, G. H.   +3 more
core   +1 more source

Study on contact patch memory and travelling waves of tyres [PDF]

, 2015
In this study, the self-excited vibrations of the caster-wheel system are analysed. A low degree-of-freedom mechanical model is considered, in which the lateral deformation of the tyre is described both in the contact patch and outside it.
Stépán, Gábor, Takács, Dénes
core  

Stability of solutions to nonlinear wave equations with switching time-delay

, 2015
In this paper we study well-posedness and asymptotic stability for a class of nonlinear second-order evolution equations with intermittent delay damping. More precisely, a delay feedback and an undelayed one act alternately in time.
Fragnelli, Genni, Pignotti, Cristina
core   +1 more source

Study on vibration characteristics of wind turbines under different wind speeds

Journal of Hebei University of Science and Technology, 2018
When the wind turbine blades are running under normal conditions, the blades will vibrate due to periodic aerodynamic forces, and the use time of blades will be reduced.
Hao WU, Yongbin LAI, Long WANG, Liang LI
doaj   +1 more source

High-speed lateral stability and trajectory tracking performance for a tractor-semitrailer with active trailer steering. [PDF]

PLoS One, 2022
Hou Y, Xu X.
europepmc   +1 more source

Stability of Castering Wheels for Aircraft Landing Gears, Special Report [PDF]

In many installations of castering rubber-tired wheels there is a tendency for the wheel to oscillate violently about the spindle axis. This phenomenon, popularly called 'shimmy,' has occurred in some airplane tail wheels and has been corrected in two ...
Kantrowitz, Arthur
core   +1 more source