Characterization and Fabrication of Synthetic Rough Surfaces for Acoustical Scale-Model Experiments

2005 ◽  
Author(s):  
Jason E. Summers ◽  
Raymond J. Soukup ◽  
Robert F. Gragg
Keyword(s):  
Rough Surfaces ◽  
Scale Model ◽  
Model Experiments

Scale model experiments over curved rough surfaces

2006 ◽  
Vol 120 (5) ◽  
pp. 3339-3339
Author(s):  
James Chambers ◽  
Andrew Whelan
Keyword(s):  
Rough Surfaces ◽  
Scale Model ◽  
Model Experiments

Experimental Study for SPAR Type Floating Offshore Wind Turbine With Blade-Pitch Control

2013 ◽  
Author(s):  
Toshiki Chujo ◽  
Yoshimasa Minami ◽  
Tadashi Nimura ◽  
Shigesuke Ishida
Keyword(s):  
Wind Turbine ◽  
Wind Farm ◽  
Offshore Wind ◽  
Scale Model ◽  
Offshore Wind Turbine ◽  
Experimental Proof ◽  
Pitch Control ◽  
Model Experiments ◽  
North Eastern ◽  
North Eastern Part

The experimental proof of the floating wind turbine has been started off Goto Islands in Japan. Furthermore, the project of floating wind farm is afoot off Fukushima Prof. in north eastern part of Japan. It is essential for realization of the floating wind farm to comprehend its safety, electric generating property and motion in waves and wind. The scale model experiments are effective to catch the characteristic of floating wind turbines. Authors have mainly carried out scale model experiments with wind turbine models on SPAR buoy type floaters. The wind turbine models have blade-pitch control mechanism and authors focused attention on the effect of blade-pitch control on both the motion of floater and fluctuation of rotor speed. In this paper, the results of scale model experiments are discussed from the aspect of motion of floater and the effect of blade-pitch control.

scholarly journals Modelling imperfections in unreinforced masonry structures: Discrete element simulations and scale model experiments of a pavilion vault

2021 ◽  
Vol 228 ◽  
pp. 111499
Author(s):  
Alessandro Dell'Endice ◽  
Antonino Iannuzzo ◽  
Matthew J. DeJong ◽  
Tom Van Mele ◽  
Philippe Block
Keyword(s):  
Discrete Element ◽  
Unreinforced Masonry ◽  
Scale Model ◽  
Masonry Structures ◽  
Model Experiments ◽  
Discrete Element Simulations

An advanced two-scale model of EM backscattering from rough surfaces

2022 ◽  
Vol 135 ◽  
pp. 315-321
Author(s):  
Wen-Jing Zheng ◽  
Zi He ◽  
Da-Zhi Ding ◽  
Fan Ding ◽  
Ru-Shan Chen
Keyword(s):  
Rough Surfaces ◽  
Scale Model

Fundamentals of scale model experiments

JOM ◽  
1957 ◽  
Vol 9 (10) ◽  
pp. 1353-1358
Author(s):  
W. O. Philbrook
Keyword(s):  
Scale Model ◽  
Model Experiments

Critical Conditions for Liquid Mediated Collapse of Two-Dimensional Rough Surfaces

2007 ◽  
Author(s):  
Jeffrey L. Streator ◽  
Robert L. Jackson
Keyword(s):  
Liquid Droplet ◽  
Rough Surfaces ◽  
Full Range ◽  
Surface Profile ◽  
Adhesive Force ◽  
Scale Model ◽  
Critical Conditions ◽  
Liquid Volume ◽  
Small Scale ◽  
Unit Depth

Small-scale devices are particularly vulnerable to adverse effects of adhesion because of large surface-area-to-volume ratios. Additionally, small gaps can be easily bridged at high humidity or when there are other contaminant liquids present. The bridging of a portion of the interface by a liquid droplet of given volume, tends to pull surfaces in closer proximity due to the sub-ambient pressures that arise. In turn, regions spanned by the bridge will increase in size and lead to a greater adhesive force. In the present work we develop a model for these effects in the presence of surface roughness. The influence of asperities on the surface is treated by means of a recently-developed multi-scale model that considers the full range of wavelengths comprising the surface profile. In the simulations, two nominally flat rough surfaces with profiles that vary only in one direction are brought together under a prescribed load. A liquid bridge of given volume (per unit depth) is then introduced into the contact, assuming an initial areal coverage. The interface configuration is then iterated until one is found that satisfies the equations of elasticity and capillarity for a given liquid volume. As a result of the simulation, critical values are found for combinations of parameters that delineate stable and unstable conditions.

Scale model experiments on the insertion loss of wide and double barriers

1998 ◽  
Vol 103 (5) ◽  
pp. 2762-2762
Author(s):  
Glenn J. Wadsworth ◽  
James P. Chambers
Keyword(s):  
Insertion Loss ◽  
Scale Model ◽  
Model Experiments

Scale model experiments with ceramic laminate targets

1996 ◽  
Vol 18 (1) ◽  
pp. 1-22 ◽  
Author(s):  
Charles E. Anderson ◽  
Scott A. Mullin ◽  
Andrew J. Piekijtowski ◽  
Neil W. Blaylock ◽  
Kevin L. Poormon
Keyword(s):  
Scale Model ◽  
Model Experiments
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