نتایج جستجو برای: von kármán theory
تعداد نتایج: 874506 فیلتر نتایج به سال:
Abstract. We study investigate a long, thin rectangular elastic membrane that is bent through an angle 2α, using the Föppl–von Kármán ansatz in a geometrically linear setting. We study the associated variational problem, and show the existence of a minimizer for the elastic energy. We also prove rigorous upper and lower bounds for the minimum energy of this configuration in terms of the plate t...
We study the effect of a turbulent flow of liquid sodium generated in the von Kármán geometry, on the localized field of a magnet placed close to the frontier of the flow. We observe that the field can be transported by the flow on distances larger than its integral length scale. In the most turbulent configurations, the mean value of the field advected at large distance vanishes. However, the ...
We prove that the critical points of the 3d nonlinear elasticity functional on shells of small thickness h, around the mid-surface S of arbitrary geometry, converge as h → 0 to the critical points of the von Kármán functional on S, recently derived in [14]. We prove the same convergence result for the weak solutions to the static equilibrium equations (formally the EulerLagrange equations assoc...
We suggest an approach to probing intermittency corrections to the Kolmogorov law in turbulent flows based on the autoregressive moving-average modeling of turbulent time series. We introduce an index Υ that measures the distance from a Kolmogorov-Obukhov model in the autoregressive moving-average model space. Applying our analysis to particle image velocimetry and laser Doppler velocimetry mea...
This paper proposes a method to design wind turbulence model based on real spectral characteristics. It uses models Cole-Cole fractional functions approximate the power density. Von Kármán is most commonly used but originally designed for aircraft in high altitude. Therefore, it not suitable systems operating at low altitude, hence need more accurate these specific conditions. Shaping filters i...
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