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Publicatii proprii
Chaos–hyperchaos transition in a class of models governed by Sommerfeld effect
The present paper points out the scenario of the hyperchaotic attractor formation (an attractor with at least two positive Lyapunov exponents) in a class of models governed by the Sommerfeld effects. The Sommerfeld effect is the result of the conservation law of energy. When a dynamical system is coupled to a power source, it acts like a energy sink for which a part of the source energy is spend to deform the system rather than increasing the drive
Read moreOn the 3D normal tire/off-road vibro-contact problem with friction
In this paper,a virtual experiment concerning driving on off-roads is investigated via 3D normal vibro-contact problem with friction.The dynamic road concept is introduced in order to characterize a particular stretch of road by total longitudinal,lateral,and normal forces and their geometric distributions in the contact patches.The off-road profiles are built by image sonification technique. The cross-sectional curves of off-roads before and after
Read moreOn three-dimensional spherical acoustic cloaking
Transformation acoustics opens a new avenue towards the design of acoustic metamaterials, which are materials engineered at the subwavelength scale in order to mimic the parameters in wave equations. The design of the acoustic cloaking is based on the property of equations being invariant under a coordinate transformation, i.e. a specific spatial compression is equivalent to a variation of the material parameters in the original space. In this paper,
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