Acoustic Design of Naval Structures

2005 ◽  
Author(s):  
S. Nikiforov
Keyword(s):  
Acoustic Design ◽  
Naval Structures

Rapid engineering assessment method for acoustic design of metro trains

2018 ◽  
Vol 66 (3) ◽  
pp. 190-200
Author(s):  
Xiaobo Liu ◽  
Zhongcheng Jiang ◽  
Biao Ye ◽  
Xianfeng Wang
Keyword(s):  
Assessment Method ◽  
Acoustic Design

SBS gain suppression in ordinary single-mode optical fibers with improved multimode acoustic design

2020 ◽  
Author(s):  
S.V. Tsvetkov ◽  
M.M. Khudyakov ◽  
A.S. Lobanov ◽  
D.S. Lipatov ◽  
M.M. Bubnov ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Single Mode ◽  
Acoustic Design

Optimized Performance and Acoustic Design for Hover-Propeller

2021 ◽  
Author(s):  
Ohad Gur ◽  
Jonathan Silver ◽  
Radovan Dítě ◽  
Raam Sundhar
Keyword(s):  
Acoustic Design

scholarly journals Structural response of reduced scale naval structures under impact tests

2014 ◽  
Vol 16 ◽  
pp. 07002
Author(s):  
M.A.G. Calle ◽  
R.E. Oshiro ◽  
L.M. Mazzariol ◽  
M. Alves
Keyword(s):  
Structural Response ◽  
Impact Tests ◽  
Naval Structures ◽  
Reduced Scale

Acoustic design optimization for vibration of cylinder container coupled with interior acoustic field

2009 ◽  
Vol 328 (4-5) ◽  
pp. 607-617 ◽  
Author(s):  
Zhang Jun ◽  
Cheng Geng-dong ◽  
Zhao Wen-zhong ◽  
Zhao Guo-zhong
Keyword(s):  
Design Optimization ◽  
Acoustic Field ◽  
Acoustic Design

An Acoustic Design Procedure for Intake Systems: 1D Analysis and Experimental Validation

2004 ◽  
Author(s):  
F. Bozza ◽  
A. Gimelli ◽  
V. Pianese ◽  
S. De Martino ◽  
R. Curion
Keyword(s):  
Experimental Validation ◽  
Design Procedure ◽  
Acoustic Design

Effects of director rotation relaxation on viscoelastic wave dispersion in nematic elastomer beams

2018 ◽  
Vol 24 (4) ◽  
pp. 1103-1115 ◽  
Author(s):  
Dong Zhao ◽  
Ying Liu
Keyword(s):  
Wave Motion ◽  
Relaxation Times ◽  
Low Frequency ◽  
Wave Dispersion ◽  
Frequency Limit ◽  
Anisotropic Parameter ◽  
Acoustic Design ◽  
Phase Velocities ◽  
Nematic Elastomer ◽  
Viscoelastic Wave

In this paper, the transverse wave dispersion in a nematic elastomer (NE) Timoshenko beam is studied by considering anisotropy and viscoelasticity of NEs in the low frequency limit. Firstly, the characteristic equations of wave motion in an NE beam are derived, and then numerically solved to obtain the corresponding phase velocities and attenuation factors. The influences of anisotropic parameter, director rotation and rubber relaxation times on the wave dispersion in an NE beam are discussed. Results show that unlike the situation in general isotropic viscoelastic beam, non-classical viscoelastic wave dispersion is found in NE beams. Geometric dispersion is restrained with the vanishing of cut-off frequencies for shear waves due to director rotation relaxation of NEs. This unique property promises prospective applications of NE beams in optic or acoustic design.

Acoustic Design of a Local Scatterer in a Phase-Space

1995 ◽  
Author(s):  
John J. McCoy ◽  
Ben Zion Steinberg
Keyword(s):  
Mechanical Property ◽  
Phase Space ◽  
Mass Density ◽  
Sound Field ◽  
Design Strategy ◽  
Local Region ◽  
Small Scale ◽  
Far Field ◽  
Acoustic Design ◽  
Surrounding Fluid

Abstract A spatially local region of mechanical property heterogeneity is a source of scattering, by which a structure-borne mechanical wavefield is released as sound, to a surrounding fluid. We consider the case of a scatterer which is of the order of the size of the wavelength of a plate-wave field for a frequency which is below coincidence. A design strategy for reducing the strength of the scattered sound field in the fluid, at far-field distances from the scatterer, by adding a small-scale structure to the heterogenity, is presented. The design is accomplished in a wavelet-based phase-space. Emphasized is a significant distinction required of the added structure, depending on the heterogeneity applying to a measure of the local mass density or the local bending stiffness.

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