A pinned-free beam in axial fluid flow, subjected to feedback-based actuation at the pinned end, is investigated. The may be a moment or prescribed angle and it proportional state (curvature, slope, displacement) of some point along its length. All equations boundary condition terms are non-dimensionalized stability system studied over range external flow velocity sensing location. For each com...

When using the conventional segmental superposition method to make bending moment diagram, it is not only complicated calculate, but also easy mistakes. In this paper, discussed how flexibly segment and simplify calculation with examples. At same time, according differential relationship, integral relationship static equilibrium conditions between load shear force, fast accurate pithy formula f...

A large flexible beam with a tip mass-pendulum system has been proven to be effective vibration-absorbing device for large flexible structures with tip appendages. In this study, the technique of digital image processing is used to demonstrate how unique experimental results can be obtained by the use of high performance data acquisition and high speed cameras. The measurements include time his...

A three-dimensional (3D) highly-directive emission system is proposed to enable beam shaping and beam steering capabilities in wideband frequencies. It is composed of an omnidirectional source antenna and several 3D gradient-refractive-index (GRIN) lenses. To engineer a broadband impedance match, the design method for these 3D lenses is established under the scenario of free-space excitation by...