Results 51 to 60 of about 261,690 (220)

Numerical and experimental comparisons of vortex-induced vibrations of marine risers in uniform/sheared currents [PDF]

open access: yes, 2010
This paper presents a general theoretical reduced-order model capable of evaluating the multi-mode nonlinear dynamics of marine risers subject to uniform and sheared currents.
Wiercigrocha, Marian   +8 more
core   +1 more source

Molecular Dynamic Simulation of Defective Graphene Nanoribbons for Tension and Vibration

open access: yesNanomaterials, 2022
As deformation and defects are inevitable during the manufacture and service of graphene resonators, comprehensive molecular dynamic (MD) simulations are performed to investigate the vibrational properties of the defective single-layer graphene sheets ...
Jia-Jia Mao   +3 more
doaj   +1 more source

Estimation of railway vehicle speed using ground vibration measurements [PDF]

open access: yes, 2014
In railway noise and vibration assessment, the vehicle speed is a significant concern, since vehicle/track and track/soil interaction strongly affects the vibration magnitude.
Verlinden, Olivier   +4 more
core  

Floral vibrations by buzz-pollinating bees achieve higher frequency, velocity and acceleration than flight and defence vibrations [PDF]

open access: yes, 2020
Vibrations play an important role in insect behaviour. In bees, vibrations are used in a variety of contexts including communication, as a warning signal to deter predators and during pollen foraging.
Pritchard, David J   +4 more
core   +1 more source

Cooperative Control for A Hybrid Rehabilitation System Combining Functional Electrical Stimulation and Robotic Exoskeleton

open access: yesFrontiers in Neuroscience, 2017
Functional electrical stimulation (FES) and robotic exoskeletons are two important technologies widely used for physical rehabilitation of paraplegic patients.
Dingguo Zhang   +4 more
doaj   +1 more source

Parametric Numerical Study and Multi-Objective Optimization of Composite Curing through Infrared Radiation

open access: yesApplied Mechanics
Composite curing through infrared radiation (IR) has become a popular autoclave alternative due to lower energy costs and short curing cycles. As such, understanding and measuring the effect of all parameters involved in the process can aid in selecting ...
Petros Gkertzos   +3 more
doaj   +1 more source

Theory of Nonlinear Vibrations for Antisymmetric Cross-Ply Bistable Laminated Shells

open access: yesShock and Vibration, 2021
In this paper, on the basis of taking the von Karman nonlinear factors into consideration, the constitutive equation of the antisymmetric cross-ply laminated composite was used to calculate the internal force and internal moment of the bistable structure,
B. Y. Zhang, W. Zhang
doaj   +1 more source

Investigation and Simulation of the Surface Contact Characteristics of Sinter-Joined Binder Jetting Components

open access: yesApplied Sciences, 2022
Binder jetting holds great potential for revolutionizing conventional production processes for high-performance components. However, current applications face significant challenges regarding the depowdering and cleaning of complex internal geometries. A
Alexander Rütjes   +3 more
doaj   +1 more source

Finite element reduced order models for nonlinear vibrations of piezoelectric layered beams with applications to NEMS [PDF]

open access: yes, 2012
This article presents a finite element reduced order model for the nonlinear vibrations of piezoelectric layered beams with application to NEMS. In this model, the geometrical nonlinearities are taken into account through a von Kármán nonlinear strain ...
O. Thomas   +5 more
core   +1 more source

Approximate Analytical Methodology for the Restricted Three-Body and Four-Body Models Based on Polynomial Series

open access: yesInternational Journal of Aerospace Engineering, 2016
The restricted three-body problem (R3BP) and restricted four-body problem (R4BP) are modeled based on the rotating frame. The conservative autonomous system for the R3BP and nonautonomous system with period parametric resonance due to the fourth body are
Ying-Jing Qian   +3 more
doaj   +1 more source

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