Nonlinear behavior of rail fastening system on slab track at railway bridge ends: FEA and experimental study

2019 ◽  
Vol 195 ◽  
pp. 84-95 ◽  
Author(s):  
Deokyong Sung ◽  
Seongkyu Chang
Keyword(s):  
Experimental Study ◽  
Nonlinear Behavior ◽  
Railway Bridge ◽  
Slab Track

Experimental Investigation on the Use of Bispectral Analysis in Detecting Nonlinear Faults in Hydraulic Machines

2014 ◽  
Vol 606 ◽  
pp. 147-151 ◽  
Author(s):  
M.S. Somia Alfatih ◽  
M. Salman Leong ◽  
L.M. Hee
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Signal Processing ◽  
Spectral Analysis ◽  
Centrifugal Pump ◽  
Nonlinear Behavior ◽  
Suction Side ◽  
Bispectral Analysis ◽  
Detection And Identification ◽  
Hydraulic Machines

Bispectral analysis is one of the relatively more recent tools in signal processing used for detection and identification of higher harmonics in a signal. It is also acknowledged to be one of Higher Order Spectral Analysis (HOSA) effective tools for detecting nonlinear behavior in mechanical systems. In this study, vibration sources in a hydraulic machine which may have features of nonlinear behavior were investigated. An experimental study was undertaken to formulate a more sensitive and effective method using Bispectral analysis to diagnose cavitation in a centrifugal pump facility. Cavitation was induced on the suction side of the pump. The cavitation signal was analyzed with and without induced cavitation conditions at different locations on the pump, and analyzed using FFT and bispectrum methods. It was observed that bispectral analysis could be used as an early indicator of cavitation with changes for severity of cavitation.

An Experimental Study of Nonlinear Behavior of Graphite/Epoxy Laminate under a Three-Point Bending Test

2021 ◽  
Vol 900 ◽  
pp. 9-15
Author(s):  
Mouad Bellahkim ◽  
Youssef Benbouras ◽  
Aziz Maziri ◽  
El Hassan Mallil ◽  
Jamal Echaabi
Keyword(s):  
Experimental Study ◽  
Failure Modes ◽  
Nonlinear Behavior ◽  
Bending Test ◽  
Three Point Bending ◽  
Digital Microscope ◽  
Layer Orientation ◽  
Bending Behavior ◽  
The Relationship ◽  
Geometrical Dimensions

In this work, an attempt has been made to study the experimental of behavior for carbon/epoxy woven laminates under a three-point bending test by varying the support span and the geometrical dimensions of the specimens. Two principles stacking sequences are studied ([45 / 0]2s & [90 / 0]6 ) to observe the effect of the layer orientation in the failure modes. This study has allowed us to confirm the relationship between the bending behavior of the specimens and the span-to-thickness ratio (l/h). Finally, a digital microscope was selected in order to characterize the succession of the failure and the failure modes, mainly the delamination damage.

scholarly journals Experimental study of noise mitigation measures on a slab track

2021 ◽  
Vol 172 ◽  
pp. 107630
Author(s):  
Xianying Zhang ◽  
Hongseok Jeong ◽  
David Thompson ◽  
Giacomo Squicciarini
Keyword(s):  
Experimental Study ◽  
Mitigation Measures ◽  
Noise Mitigation ◽  
Slab Track

Interaction Analysis of Sliding Slab Track on Railway Bridge Considering Behavior of End-Supporting Anchors

2019 ◽  
Vol 19 (6) ◽  
pp. 1939-1950 ◽  
Author(s):  
Hyun Sung Choi ◽  
Kyoung-Chan Lee ◽  
Seong-Cheol Lee ◽  
Jungwhee Lee
Keyword(s):  
Interaction Analysis ◽  
Railway Bridge ◽  
Slab Track ◽  
Sliding Slab
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