On transient waves produced by a source on superluminal pulsate sphere

2003 ◽  
Author(s):  
I.I. Simonenko
Keyword(s):  
Transient Waves

scholarly journals Acoustoelasticity Analysis of Transient Waves for Non-Invasive In Vivo Assessment of Urinary Bladder

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Mahdi Bayat ◽  
Saba Adabi ◽  
Viksit Kumar ◽  
Adriana Gregory ◽  
Jeremy Webb ◽  
...  
Keyword(s):  
Urinary Bladder ◽  
Transient Waves ◽  
Non Invasive ◽  
In Vivo Assessment

Transient waves in inhomogeneous isotropic elastic plates

1984 ◽  
Vol 53 (3-4) ◽  
pp. 141-161 ◽  
Author(s):  
H. Cohen ◽  
R. S. D. Thomas
Keyword(s):  
Elastic Plates ◽  
Transient Waves

Some results of a numerical analysis of transient waves in gas suspensions

1977 ◽  
Vol 11 (5) ◽  
pp. 705-709 ◽  
Author(s):  
A. A. Gubaidullin ◽  
A. I. Ivandaev ◽  
R. I. Nigmatulin
Keyword(s):  
Numerical Analysis ◽  
Transient Waves ◽  
Gas Suspensions

scholarly journals Transient Excitation of an Elastic Half Space by a Point Load Traveling on the Surface

1969 ◽  
Vol 36 (3) ◽  
pp. 505-515 ◽  
Author(s):  
D. C. Gakenheimer ◽  
J. Miklowitz
Keyword(s):  
Exact Solution ◽  
Free Surface ◽  
Steady State ◽  
Wave Front ◽  
Half Space ◽  
Displacement Field ◽  
Elastic Half Space ◽  
Point Load ◽  
Limit Case ◽  
Transient Waves

The propagation of transient waves in a homogeneous, isotropic, linearly elastic half space excited by a traveling normal point load is investigated. The load is suddenly applied and then it moves rectilinearly at a constant speed along the free surface. The displacements are derived for the interior of the half space and for all load speeds. Wave-front expansions are obtained from the exact solution, in addition to results pertaining to the steady-state displacement field. The limit case of zero load speed is considered, yielding new results for Lamb’s point load problem.

scholarly journals Numerical Assessment of the Performance of Elastic Cloaks for Transient Flexural Waves

2020 ◽  
Vol 7 ◽  
Author(s):  
Marco Rossi ◽  
Daniele Veber ◽  
Massimiliano Gei
Keyword(s):  
Finite Element ◽  
Thin Plates ◽  
Winkler Foundation ◽  
Finite Element Code ◽  
Flexural Waves ◽  
Transient Waves ◽  
Mathematical Transformation ◽  
Plane Body ◽  
Numerical Assessment ◽  
Subgrade Modulus

A relevant application of transformation elastodynamics has shown that flexural waves in a Kirchhoff-Love plate can be diverted and channeled to cloak a region of the ambient space. To achieve the goal, an orthotropic meta-structural plate should be employed. However, the corresponding mathematical transformation leads to the presence of an unwanted strong compressive prestress, likely beyond the buckling threshold of the structure, with a set of in-plane body forces to warrant equilibrium. In addition, the plate must possess, at the same time, high bending stiffnesses, but a null twisting rigidity. With the aim of estimating the performance of cloaks modelled with approximate parameters, an in-house finite element code, based on a subparametric technique, is implemented to deal with the cloaking of transient waves in orthotropic thin plates. The tool allows us to explore the sensitivity of specific stiffness parameters that may be difficult to match in a real cloak design. In addition, the finite element code is extended to investigate a meta-plate interacting with a Winkler foundation, to confirm how the subgrade modulus should transform in the cloak region.

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