Experimental Analysis of the Dynamic Behaviour of a Railway Track in Transition Zones

2014 ◽  
Author(s):  
V.L. Markine ◽  
H. Wang ◽  
I.Y. Shevtsov
Keyword(s):  
Experimental Analysis ◽  
Dynamic Behaviour ◽  
Railway Track ◽  
Transition Zones

Dynamic characteristics of squeeze-type mount using magnetorheological fluid

2005 ◽  
Vol 219 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Y K Ahn ◽  
J-Y Ha ◽  
Y-H Kim ◽  
B-S Yang ◽  
M Ahmadian ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Experimental Analysis ◽  
Vibration Isolation ◽  
Dynamic Behaviour ◽  
Electrical Current ◽  
Magnetorheological Fluid ◽  
Test Set ◽  
Mr Fluid ◽  
Set Up ◽  
Stiffness And Damping

This paper presents an analytical and experimental analysis of the characteristics of a squeeze-type magnetorheological (MR) mount which can be used for various vibration isolation areas. The concept of the squeeze-type mount and details of the design of a squeeze-type MR mount are discussed. These are followed by a detailed description of the test set-up for evaluating the dynamic behaviour of the mount. A series of tests was conducted on the prototype mount built for this study, in order to characterize the changes occurring as a result of changing electrical current to the mount. The results of this study show that increasing electrical current to the mount, which increases the yield stress of the MR fluid, will result in an increase in both stiffness and damping of the mount. The results also show that the mount hysteresis increases with increase in current to the MR fluid, causing changes in stiffness and damping at different input frequencies.

scholarly journals WHEEL–RAIL WEAR INVESTIGATION ON A HEAVY HAUL BALLOON LOOP TRACK THROUGH SIMULATIONS OF SLOW SPEED WAGON DYNAMICS

Transport ◽  
2018 ◽  
Vol 33 (3) ◽  
pp. 843-852 ◽  
Author(s):  
Yan Quan SUN ◽  
Maksym SPIRYAGIN ◽  
Colin COLE ◽  
Dwayne NIELSEN
Keyword(s):  
Dynamic Behaviour ◽  
Railway Track ◽  
Contact Friction ◽  
Slow Speed ◽  
Wear Process ◽  
Contact Wear ◽  
Rail Wear ◽  
Heavy Haul ◽  
Curve Radius ◽  
Heavy Haul Railway

Heavy haul railway track infrastructure are commonly equipped with balloon loops to allow trains to be loaded/unloaded and/or to reverse the direction of travel. The slow operational speed of trains on these sharp curves results in some unique issues regarding the wear process between wheels and rails. A wagon dynamic system model has been applied to simulate the dynamic behaviour in order to study the wheel–rail contact wear conditions. A wheel–rail wear index is used to assess the wear severity. The simulation shows that the lubrication to reduce the wheel–rail contact friction coefficient can significantly reduce the wear severity. Furthermore, the effects of important parameters on wheel–rail contact wear including curve radius, wagon speed and track superelevation have also been considered.

Model and experimental analysis of the dynamic behaviour of air conditioning plant pipelines

2006 ◽  
Vol 2 (1) ◽  
pp. 41
Author(s):  
Massimo Sorli ◽  
Andrea Almondo ◽  
Walter Franco ◽  
Ermanno Giorcelli
Keyword(s):  
Experimental Analysis ◽  
Air Conditioning ◽  
Dynamic Behaviour

Analysis of dynamic behaviour of low vibration track under wheel load drop by a finite element method algorithm

2008 ◽  
Vol 222 (2) ◽  
pp. 217-223 ◽  
Author(s):  
J-Y Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Field Experiments ◽  
Dynamic Behaviour ◽  
Dynamic Properties ◽  
Numerical Procedure ◽  
Railway Track ◽  
Load Drop ◽  
Wheel Load ◽  
Element Method

According to finite-element method (FEM) analytical solution (based on penalty algorithm) and the control equations of wheel—rail contact (developed from point-to-surface contact elements), the vibration responses were simulated for the two alternative railway track structures impacted by a falling wheel-set. The dynamic behaviour of low vibration track (LVT) is investigated based on this numerical method, which is verified by the field experiments. The results show that, when compared with the conventional short sleeper buried track (SSBT), the LVT is more beneficial for the reduction of track structure vibration levels — thanks to its properly matched stiffness under rail and block. Furthermore, it is demonstrated that the proposed wheel-load-drop FEM numerical procedure and field experiment can effectively and economically study the dynamic properties of track structures.

scholarly journals EXPERIMENTAL ANALYSIS OF THE DYNAMIC BEHAVIOUR OF A REAL WATER DISTRIBUTION SYSTEM

2019 ◽  
Author(s):  
VALENTINA MARSILI ◽  
SILVIA MENICONI ◽  
STEFANO ALVISI ◽  
BRUNO BRUNONE ◽  
MARCO FRANCHINI
Keyword(s):  
Experimental Analysis ◽  
Distribution System ◽  
Water Distribution ◽  
Dynamic Behaviour ◽  
Water Distribution System
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