LASER INSTALLATION FOR THE MEASUREMENT OF THE ACOUSTIC FIELDS PARAMETERS ON THE SURFACE OF ACOUSTIC WAVE GUIDES

Parallel computing techniques are applied to a linear acoustic wave model to reduce execution time. Three parallel computing models are developed to parallelize computations. The fork-and-join, SPMD and SIMT models define the execution of parallel computations. The precision and efficiency of the linear acoustic wave model are improved through substantial speedups in all implementations. Furthermore, axisymmetric properties of certain acoustic fields lead to a reduction in the spatio-temporal complexity of those acoustic fields by removing redundant computations. The same linear acoustic wave model is also modified and extended to describe wave propagation across multiple media instead of only a single medium. The developed implementations are integrated into a particularly useful package for high performance simulation of two- or three-dimensional linear acoustic elds generated by realistic sources in various fluid media.

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Acoustic fields and velocities for surface‐acoustic‐wave propagation in multilayered structures: An extension of the Laguerre polynomial approach

Journal of Applied Physics ◽

10.1063/1.347086 ◽

1990 ◽

Vol 68 (10) ◽

pp. 4993-4997 ◽

Cited By ~ 64

Author(s):

Yoonkee Kim ◽

William D. Hunt

Keyword(s):

Wave Propagation ◽

Acoustic Wave ◽

Surface Acoustic Wave ◽

Laguerre Polynomial ◽

Acoustic Fields ◽

Acoustic Wave Propagation ◽

Multilayered Structures

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Disconjugacy and Nonoscillation Domains for Nonlinear Singular Interface Problems on Semi-Infinite Time Scales

ISRN Mathematical Analysis ◽

10.5402/2011/254695 ◽

2011 ◽

Vol 2011 ◽

pp. 1-23

Author(s):

D. K. K. Vamsi ◽

Pallav Kumar Baruah

Keyword(s):

Acoustic Wave ◽

Boundary Value Problems ◽

Time Scale ◽

Oscillatory Behavior ◽

Interface Problems ◽

Dynamic Equations ◽

Interface Conditions ◽

Infinite Time ◽

Transverse Vibrations ◽

Wave Guides

We define and discuss the disconjugacy (D) and nonoscillation (N) domains for a pair of dynamic equations along with matching interface conditions on the semi-infinite time scale [0,c]T∪[σ(c),∞]T. We show that these domains are closed and convex subsets of the parameter space ℝn+m. The theory developed is used to discuss the oscillatory behavior of initial and boundary value problems associated with interface problems in the fields of applied elasticity, acoustic wave guides in ocean, and transverse vibrations in strings.

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Exploring multistability in prismatic metamaterials through local actuation

Nature Communications ◽

10.1038/s41467-019-13319-7 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 6

Author(s):

Agustin Iniguez-Rabago ◽

Yun Li ◽

Johannes T. B. Overvelde

Keyword(s):

Energy Storage ◽

Acoustic Wave ◽

Mechanical Behavior ◽

Storage Systems ◽

Building Blocks ◽

Local Minima ◽

Precise Control ◽

Experimental Strategy ◽

Artificial Materials ◽

Wave Guides

AbstractMetamaterials are artificial materials that derive their unusual properties from their periodic architecture. Some metamaterials can deform their internal structure to switch between different properties. However, the precise control of these deformations remains a challenge, as these structures often exhibit non-linear mechanical behavior. We introduce a computational and experimental strategy to explore the folding behavior of a range of 3D prismatic building blocks that exhibit controllable multifunctionality. By applying local actuation patterns, we are able to explore and visualize their complex mechanical behavior. We find a vast and discrete set of mechanically stable configurations, that arise from local minima in their elastic energy. Additionally these building blocks can be assembled into metamaterials that exhibit similar behavior. The mechanical principles on which the multistable behavior is based are scale-independent, making our designs candidates for e.g., reconfigurable acoustic wave guides, microelectronic mechanical systems and energy storage systems.

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