Zobrazeno 1 - 10
of 803
pro vyhledávání: '"Norris, A. N."'
The forced time harmonic response of a spatiotemporally-modulated elastic beam of finite length with light damping is derived using a novel Green's function approach. Closed-form solutions are found that highlight unique mode coupling effects that ar
Externí odkaz:
http://arxiv.org/abs/2409.02829
Publikováno v:
Journal of the Acoustical Society of America, 155, 2247-2256, 2024
The interaction of an acoustic plane wave with a pair of plates connected by periodically spaced stiffeners in water is considered. The rib-stiffened structure is called a "flex-layer" because its low frequency response is dominated by bending stiffn
Externí odkaz:
http://arxiv.org/abs/2403.13832
This chapter presents a selection of theoretical and numerical tools suitable for the study of wave propagation in time-dependent media. The focus is on one-dimensional spring-mass chains whose properties are modulated in space and time in a periodic
Externí odkaz:
http://arxiv.org/abs/2211.06294
Autor:
Norris, Andrew N.
Propagation of sound through a non-uniform medium without scattering is possible, in principle, if the density and acoustic compressibility assume complex values, requiring passive and active mechanisms, also known as Hermitian and non-Hermitian solu
Externí odkaz:
http://arxiv.org/abs/2209.14231
Autor:
Johnson, Luke J., Norris, Charlotte N., Unruh, Yvonne C., Solanki, Sami K., Krivova, Natalie, Witzke, Veronika, Shapiro, Alexander I.
Variability observed in photometric lightcurves of late-type stars (on timescales longer than a day) is a dominant noise source in exoplanet surveys and results predominantly from surface manifestations of stellar magnetic activity, namely faculae an
Externí odkaz:
http://arxiv.org/abs/2104.11544
Autor:
Lu, Zhaocheng, Norris, Andrew N.
Longitudinal wave propagation is considered in a pair of waveguides connected by bilinear spring systems. The nature of the nonlinearity causes the compressive and tensile force-displacement relations of the bilinear spring to behave in a piece-wise
Externí odkaz:
http://arxiv.org/abs/2012.00693
Autor:
Bharthi, Rosh, Rogowski, Brandon C., Moran, Michael, Norris, Jordan N., Esplin, Nathan, Tomycz, Nestor D.
Publikováno v:
In World Neurosurgery September 2023 177:e532-e539
Autor:
Norris, Andrew N., Parnell, William J.
New connections between static elastic cloaking, low frequency elastic wave scattering and neutral inclusions are established in the context of two dimensional elasticity. A cylindrical core surrounded by a cylindrical shell is embedded in a uniform
Externí odkaz:
http://arxiv.org/abs/1910.12866
Autor:
Lu, Zhaocheng, Norris, Andrew N.
Significant amplitude-independent and passive non-reciprocal wave motion can be achieved in a one dimensional (1D) discrete chain of masses and springs with bilinear elastic stiffness. Some fundamental asymmetric spatial modulations of the bilinear s
Externí odkaz:
http://arxiv.org/abs/1910.05356
Acoustic bianisotropic materials couple pressure and local particle velocity fields to simultaneously excite monopole and dipole scattering, which results in asymmetric wave transmission and reflection of airborne sound. In this work, we systematical
Externí odkaz:
http://arxiv.org/abs/1905.09984