Abstract This paper presents the application of an exponential version harmonic balance method to analysis steady state vibration geometrically nonlinear systems. A detailed description and corresponding numerical procedure is provided. The von Karman theory used describe effects geometric nonlinearity. material beams modelled with help Zener model using fractional calculus. problem solved meth...

The downstroke-to-upstroke transition of many insects is characterized by rapid wing rotation. The aerodynamic consequences of these rapid changes in angle of attack have been investigated using a mechanical model dynamically scaled to the Reynolds number appropriate for the flight of small insects such as Drosophila. Several kinematic parameters of the wing flip were examined, including the sp...

This paper shows that the turbulent velocity profile for zero-pressure-gradient boundary layers is affected by the wall shear stress and convective inertia. The effect of the wall shear stress is dominant in the so-called overlap region and can be described by a logarithmic law in which the von Karman constant is about 0.4 while the additive constant depends on a Reynolds number. The effect of ...

• Without slip at the wall, alternate vortex shedding occurs behind cylinder With double cylinder. Good correlation between numerical predictions and experimental results. Vortex frequency decreases as yield stress increases or inertia Viscoelastic effects are slight. Two-dimensional unsteady inertial flows of a fluid around were studied experimentally. Carbopol aqueous gels, well-known model f...

ABSTRACT We derive a theoretical parameter for three seismic scattering regimes where wavelengths are either much shorter, similar, or longer than the correlation length of small-scale Earth heterogeneities. focus our analysis on power spectral density (PSD) von Karman autocorrelation function (ACF), used to characterize spatial heterogeneity variations elastic rock parameters that cause seismi...

This study focuses on the effects of vegetation patch density, bed condition, and incoming sediment flow structure morphology within around a patch. The variation in upstream adjustment velocity is not well defined for low-density patches but decreases with increasing density high-density patches. length region greater vegetation. Incoming causes reduction both steady wake at low density. recov...

fiber/ metal laminates (fmls) are hybrid composites consisting of alternating thin layers of metal sheets and fiber reinforced epoxy laminates. in this study, the effect of fiber orientation on impact properties of fml plates is investigated both analytically and experimentally. two groups of specimens were prepared and tested in two different levels of impactor energy. the indentation depth an...

Pulsed Nuclear Space Propulsion, researched in the 1950s and 1960s by such eminent physicists as Freeman Dyson, Ted Taylor, Theodore von Karman, Hans Bethe, involves propelling large spacecraft using compact nuclear explosions from specialized atomic devices. This technology is often known name of Air Force project which it was developed: Orion. It has long been believed that 1962 Limited Test ...