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The leakage of pipeline would cause serious problems, especially when the pipe conveying petroleum or other toxic substance. For the ocean mining system, the complex environment would increase the risk of the fracture. Once the leakage occurs, the vibration of the pipe would aggravate spill situation and even result in crack of the pipe. To prevent the detriment of the leaking, the dynamic performance...
Micro-Doppler features can be regarded as a unique signature of an object with movements which provide additional information for classification, recognition and identification of the object. The common analysis method of Micro-Motion is time-frequency transform. However, the three-dimensional signatures of time-frequency distribution are not convenient to store and distinguish targets. The paper...
In this paper, the inner boundary conditions of a simply supported rectangular Mindlin plate with a finite-length Part-through crack is first obtained. The part-through crack on the plate surface having an arbitrary length and depth is assumed to be open, non-propagating and parallel to one side of the plate. Based on Mindlin plate theory and Hamilton theory, we got the governing equations of motion...
Nonlinear behaviors of thin-walled Euler-Bernoulli beams with varying rotating speed which are attached to a rigid hub are investigated. Centrifugal force, aerodynamic load and the perturbed angular speed due to the inconstant air velocity are considered. The nonlinear factors are involved in displacement-strain relationships. The nonlinear governing partial differential equations of high-speed rotating...
In this paper, the nonlinear dynamics modeling of an axially moving cantilever rectangular laminated composite plate excited by aerodynamic force were studied for the first time. The major results of this paper as following: Firstly, based on the third-order shear deformable plate theory, the nonlinear governing equations of motion for an axially moving cantilever rectangular laminated plate were...
Global dynamics of a simply supported functionally graded materials (FGM) rectangular plate are studied using the extended Melnikov method for the first time. The FGM plate is subjected to the transversal and in-plane excitations. Material properties are assumed to be temperature-dependent. A two-degree-of-freedom nonlinear system governing equations of motion for the FGM rectangular plate is derived...
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