搜索结果: 1-14 共查到“工学 Oscillations”相关记录14条 . 查询时间(0.078 秒)
Non-linear modal interactions in the oscillations of a liquid drop in a gravitational "eld
Liquid drop Modal interactions Bifurcations
2015/8/27
Non-linear modal interactions in the dynamics of a vibrating drop are examined. The partial di!erential equations governing the drop vibrations are formulated assuming potential #ow and incompressibil...
Limit Cycle Oscillations in CW Laser-Driven NEMS
Finite element method (FEM) laser drive limit cycle oscillation self-oscillation thermal stress
2015/8/27
Limit cycle, or self-oscillations, can occur in a variety of NEMS devices illuminated within an interference field. As the device moves within the field, the quantity of light absorbed and hence the r...
Comparative Analysis of Computational Methods for Limit-Cycle Oscillations
Comparative Analysis Computational Methods Limit-Cycle Oscillations
2015/7/2
Various methods are explored in the computation of time-periodic solutions for autonomous systems. The purpose of the work is to illuminate the capabilities and limitations of methods, including a new...
Mitigating horizontal divergence ‘‘checker-board’’ oscillations on unstructured triangular C-grids for nonlinear hydrostatic and nonhydrostatic flows
Unstructured mesh modeling Triangular C-grid Implicit (elliptic) and explicit filtering Horizontal divergence error Secondary circulation
2015/6/30
A complication of finite-volume triangular C-grid methods is the numerical emergence of horizontal divergence errors that lead to grid-scale oscillations in vertical velocity. Nonlinear feedback via a...
A Nonlinear Model for Wind-Induced Oscillations of Trees
Nonlinear Model Wind-Induced Oscillations Trees
2014/10/23
Ambient wind causes trees to oscillate. Wind-induced oscillations of trees constitute a fluid-structure interaction problem, which has been studied by many researchers from various points of view. How...
MODELING SPACECRAFT OSCILLATIONS IN HRSC IMAGES OF MARS EXPRESS
: Bundle Adjustment Multi-Line Camera HRSC Planetary Imagery
2014/6/5
Since January 2004 the High Resolution Stereo Camera (HRSC) is mapping planet Mars. The multi-line sensor on board the ESA
Mission Mars Express images the Martian surface with a resolution of up to 1...
IPSO Based UPFC Robust Output Feedback Controllers for Damping of Low Frequency Oscillations
UPFC IPSO output feedback Controller
2010/2/2
On the basis of the linearized Phillips-Herffron model
of a single-machine power system, a novel method for designing
unified power flow controller (UPFC) based output feedback
controller is presen...
Toward Attenuation of Self-sustained Oscillations of a Turbulent Jet through Two Orificies with Same Diameter
Self-sustained oscillations attenuation or damping of flow-induced vibrations turbulent pipe flow
2009/10/15
The experiments were carried out with various types of attenuators such as volume addition, compliant boundaries and vortex generators. It was observed that the volume addition to the pipe system chan...
Analysis of Nonlinear Sustained Oscillations in Discrete Systems with Backlash and Resolution by Using a Discretization-Oriented Describing Function
Backlash describing function resolution
2009/7/27
In this paper, a discretization-oriented describing function is derived for nonlinear devices combining backlash and quantization (resolution) while being subject to discretization through a sampler a...
Ultrafast Photoinduced Reaction Dynamics and Coherent Oscillations in Photoresponsive Proteins
Ultrafast photoreaction Ultrafast Stokes shift Coherent vibration
2009/6/9
We have studied primary processes of ultrafast photoisomerization reactions of photoactive yellow protein (PYP) and visual rhodopsin (Rh) as well as ultrafast photoinduced electron transfer reactions ...
Reservoir Oscillations with Through Flow
Mathematical modeling ydraulics and hydrodynamics ipe flow
2009/2/8
The two-reservoir problem with through flow is a common feature in wastewater treatment plants
Experimental research into motor vehicle oscillations in the case of changeable deceleration
oscillation deceleration flexible mounted and inflexible mounted vehicle masses braking
2010/11/2
In this paper processes of oscillation of flexible mounted and inflexible mounted masses are analysed. The tangential effect of the wheel contact with bearing surface is given, thus enabling more prec...
Tunable terahertz Bloch oscillations in chirped photonic crystals
Tunable terahertz Bloch oscillations chirped photonic crystals
2015/8/11
We report simulations showing tunable terahertz oscillations of the electromagnetic field provided by the Bloch oscillations of a short photonic wave packet in a tilted band structure. The struc...
Longitudinal oscillations of the sugar beet root crop body at vibrational digging up from soil
longitudinal oscillations forced oscillations root crop elastic body Ostrogradskii-Hamilton principle vibrational digging up
2014/2/28
The longitudinal vibrations theory of a continuous elastic body with one fixed extremity is designed. The Ostrogradskii–Hamilton principle of a stationary operation is applied. By Ritz’s method the Ri...