An Experimental Study of the Reflection and Transmission of Flexural Waves at an Arbitrary T-Joint

1987 ◽  
Vol 54 (1) ◽  
pp. 136-140 ◽  
Author(s):  
J. F. Doyle ◽  
S. Kamle
Keyword(s):  
Experimental Study ◽  
Wave Propagation ◽  
Incident Wave ◽  
Experimental Results ◽  
Experimental Methodology ◽  
Flexural Waves ◽  
Reflection And Transmission ◽  
Structural Joints

Further developments of an experimental methodology for analyzing the effect of structural joints on wave propagation are presented. Experimental results for an arbitrary T-joint are discussed as well as improved ways of characterizing the incident wave.

An Experimental Study of the Reflection and Transmission of Flexural Waves at Discontinuities

1985 ◽  
Vol 52 (3) ◽  
pp. 669-673 ◽  
Author(s):  
J. F. Doyle ◽  
S. Kamle
Keyword(s):  
Experimental Study ◽  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Incident Wave ◽  
Experimental Results ◽  
Flexural Waves ◽  
Reflection And Transmission ◽  
Stepped Beam ◽  
Reflection Characteristics ◽  
Transmission And Reflection

The research reported is the study of the transmission and reflection characteristics of flexural waves at structural discontinuities. A Fast Fourier Transform (FFT) computer algorithm is used to characterize the dispersive flexural waves. The incident wave is propagated through two types of discontinuities namely, a stepped beam and the free end of a beam. At each stage, comparison with experimental results are made.

A Study of the Propagation of Flexural Waves in Elastic Beams

1957 ◽  
Vol 24 (3) ◽  
pp. 431-434
Author(s):  
E. A. Ripperger ◽  
H. Norman Abramson
Keyword(s):  
Wave Propagation ◽  
Cross Sections ◽  
Main Pulse ◽  
Experimental Results ◽  
Flexural Wave ◽  
Wave System ◽  
Flexural Waves ◽  
Elastic Beams ◽  
Theoretical Predictions ◽  
Flexural Wave Propagation

Abstract Experimental results for flexural wave propagation in elastic beams of circular cross sections resulting from very sharp impacts are presented. It is noted that a well-defined wave system precedes the main pulse. The experimental results are correlated with theoretical predictions from both the Pochhammer-Chree and Timoshenko theories.

Theoretical and Experimental Study on the Wave Propagation through a Micro Gap

2011 ◽  
Vol 346 ◽  
pp. 508-514
Author(s):  
Xiao Yun Chen ◽  
Gui Lan Yu ◽  
Wei Wei Cao ◽  
Wen Tao Qiang
Keyword(s):  
Experimental Study ◽  
Wave Propagation ◽  
Theoretical Analysis ◽  
Nondestructive Evaluation ◽  
Normal Incidence ◽  
Experimental Results ◽  
Harmonic Waves ◽  
Flat Interface ◽  
Gap Width

In the present paper, a preliminary exploration which includes the theoretical analysis and experimental study on the wave propagation through a micro gap was carried out. Harmonic waves, normal incidence, smooth and flat interface were taken into account. The theoretical and experimental results both show that the initial gap width has significant influences on the harmonics. Their relations may be effective on nondestructive evaluation of a pre-existing gap.

EXPERIMENTAL STUDY ON WAVE POWER CHARACTERISTIC OF BREAKWATER WITH LOW CREST DISSIPATING BLOCKS TO SHARP-ANGLED INCIDENT WAVE

2019 ◽  
Vol 75 (2) ◽  
pp. I_355-I_360
Author(s):  
Eiichirou SUGI ◽  
Hisanori YOSHIMURA ◽  
Kenta KAKOI ◽  
Aoi ENOMOTO ◽  
Takanori MORIKAWA ◽  
...  
Keyword(s):  
Experimental Study ◽  
Incident Wave ◽  
Wave Power ◽  
Power Characteristic

scholarly journals Experimental study of the $ \gamma p \rightarrow K^{0}\Sigma^{+}$, $ \gamma n \rightarrow K^{0} \Lambda$, and $ \gamma n \rightarrow K^{0} \Sigma^{0}$ reactions at the Mainz Microtron

2019 ◽  
Vol 55 (11) ◽  
Author(s):  
C. S. Akondi ◽  
K. Bantawa ◽  
D. M. Manley ◽  
S. Abt ◽  
P. Achenbach ◽  
...  
Keyword(s):  
Experimental Study ◽  
Cross Sections ◽  
Differential Cross ◽  
Legendre Polynomials ◽  
Neutral Kaon ◽  
Experimental Results ◽  
Differential Cross Sections ◽  
Theoretical Predictions ◽  
Photoproduction Reactions ◽  
Insight Into

Abstract.This work measured $ \mathrm{d}\sigma/\mathrm{d}\Omega$dσ/dΩ for neutral kaon photoproduction reactions from threshold up to a c.m. energy of 1855MeV, focussing specifically on the $ \gamma p\rightarrow K^0\Sigma^+$γp→K0Σ+, $ \gamma n\rightarrow K^0\Lambda$γn→K0Λ, and $ \gamma n\rightarrow K^0 \Sigma^0$γn→K0Σ0 reactions. Our results for $ \gamma n\rightarrow K^0 \Sigma^0$γn→K0Σ0 are the first-ever measurements for that reaction. These data will provide insight into the properties of $ N^{\ast}$N* resonances and, in particular, will lead to an improved knowledge about those states that couple only weakly to the $ \pi N$πN channel. Integrated cross sections were extracted by fitting the differential cross sections for each reaction as a series of Legendre polynomials and our results are compared with prior experimental results and theoretical predictions.

scholarly journals Numerical and experimental study of the dynamic factor of the dynamic load on the urban railway

2020 ◽  
Vol 29 (1) ◽  
pp. 195-202
Author(s):  
Tran Anh Dung ◽  
Mai Van Tham ◽  
Do Xuan Quy ◽  
Tran The Truyen ◽  
Pham Van Ky ◽  
...  
Keyword(s):  
Experimental Study ◽  
Dynamic Load ◽  
Dynamic Measurement ◽  
Experimental Results ◽  
Load Factor ◽  
Dynamic Factor ◽  
Experimental Measurements ◽  
Train Speed ◽  
Dynamic Load Factor

AbstractThis paper presents simulation calculations and experimental measurements to determine the dynamic load factor (DLF) of train on the urban railway in Vietnam. Simulation calculations are performed by SIMPACK software. Dynamic measurement experiments were conducted on Cat Linh – Ha Dong line. The simulation and experimental results provide the DLF values with the largest difference of 2.46% when the train speed varies from 0 km/h to 80 km/h

Experimental Study of a Tanker Ship Squat in Shallow Water

2014 ◽  
Vol 66 (2) ◽  
Author(s):  
Mohammadreza Fathi Kazerooni ◽  
Mohammad Saeed Seif
Keyword(s):  
Experimental Study ◽  
Shallow Water ◽  
Experimental Approach ◽  
Model Tests ◽  
Ship Hull ◽  
Experimental Results ◽  
Shallow Waters ◽  
Towing Tank ◽  
Ship Model

One of the phenomena restricting the tanker navigation in shallow waters is reduction of under keel clearance in the terms of sinkage and dynamic trim that is called squatting. According to the complexity of flow around ship hull, one of the best methods to predict the ship squat is experimental approach based on model tests in the towing tank. In this study model tests for tanker ship model had been held in the towing tank and squat of the model are measured and analyzed. Based on experimental results suitable formulae for prediction of these types of ship squat in fairways are obtained.

Experimental Study on the Optimal Thickness of Infiltration Media of the CRI System

2011 ◽  
Vol 415-417 ◽  
pp. 1703-1707
Author(s):  
Jun Min Chen ◽  
Xiao Lin Yao
Keyword(s):  
Experimental Study ◽  
Removal Efficiency ◽  
Significant Influence ◽  
Soil Column ◽  
Experimental Results ◽  
Artificial Soil ◽  
Optimal Thickness ◽  
Effluent Quality ◽  
Anaerobic Zone

Abstract. In order to investigate the optimal thickness of infiltration media in the Constructed Rapid Infiltration System, the artificial soil column is used to simulate the Constructed Rapid Infiltration System, and the CODCr, NH3-N and TN concentrations of the effluent from all the sampling sites are monitored. The experimental results and analysis show that the thickness of infiltration media exerts a significant influence on the CODCr, NH3-N and TN concentration and removal efficiency of the effluent; the CODCr, NH3-N and TN are mainly removed in the 0-1800mm zone of the artificial soil column; the total CODCr removal efficiency increases, as the thickness of infiltration media increases, but the CODCr removal efficiency in the 1800-2200mm zone is very low; the NH3-N and TN removal efficiency reaches the maximum where the thickness of infiltration media is 1800mm; the NH3-N and TN concentration of the effluent from 1800-2200mm zone dose not decrease, but increase 5-8%, due to the assimilation denitrification and amemoniation reaction on the end of the anaerobic zone; in consideration of the effluent quality, efficient biodegradation zone, construction investment, etc. the optimal thickness of infiltration media in CRI system should be 1800mm.

scholarly journals Experimental study of water droplet break up in water in oil dispersions using an apparatus that produces localized pressure drops

2019 ◽  
Vol 74 ◽  
pp. 1 ◽  
Author(s):  
Fabricio S. Silva ◽  
Ricardo A. Medronho ◽  
Luiz Fernando Barca
Keyword(s):  
Experimental Study ◽  
Droplet Size Distribution ◽  
Energy Dissipation Rate ◽  
Experimental Results ◽  
Good Prediction ◽  
Pressure Drops ◽  
Turbulence Suppression ◽  
Kolmogorov Length Scale ◽  
Control Production ◽  
Break Up

Oil production facilities have choke/control valves to control production and protect downstream equipment against over pressurization. This process is responsible for droplets break up and the formation of emulsions which are difficult to treat. An experimental study of water in oil dispersion droplets break up in localized pressure drop is presented. To accomplish that, an apparatus simulating a gate valve was constructed. Droplet Size Distribution (DSD) was measured by laser light scattering. Oil physical properties were controlled and three different break up models were compared with the experimental results. All experimental maximum diameters (dmax) were above Kolmogorov length scale. The results show that dmax decreases with increase of energy dissipation rate (ε) according to the relation dmax ∝ ε−0.42. The Hinze (1955, AIChE J.1, 3, 289–295) model failed to predict the experimental results, although, it was able to adjust reasonably well those points when the original proportional constant was changed. It was observed that increasing the dispersed phase concentration increases dmax due to turbulence suppression and/or coalescence phenomenon. Turbulent viscous break up model gave fairly good prediction.

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