Impact oscillations between a rigid conductor line and a pantograph due to a wave like wear

2019 ◽  
Vol 2019.56 (0) ◽  
pp. J042
Author(s):  
Naoto NISHIYAMA ◽  
Kiyotaka YAMASHITA
Keyword(s):  
Conductor Line ◽  
Impact Oscillations

Numerical Bifurcation Analysis of Multimode Impact Oscillations Between a Pantograph and a Rigid Conductor Line

2012 ◽  
Author(s):  
Kiyotaka Yamashita ◽  
Tomoaki Nakayama ◽  
Toshihiko Sugiura ◽  
Hiroshi Yabuno
Keyword(s):  
Bifurcation Analysis ◽  
Numerical Technique ◽  
Single Mode ◽  
Current Collection ◽  
Conductor Line ◽  
Mode Solution ◽  
Numerical Bifurcation ◽  
The Impact ◽  
Impact Oscillations ◽  
Numerical Bifurcation Analysis

This paper deals with the numerical bifurcation analysis of the contact loss between a pantograph and an overhead rigid conductor line in a railway current collection system. In the previous study, we modeled this problem as impact oscillations of an intermediate spring-supported beam excited by an oscillating plate. We have already derived the modal interaction relationship equations that describe the velocities immediately after an impact as functions of the velocities before impact for each vibration mode. A numerical calculation using these relationship equations was performed to clarify the impact oscillations with multiple vibration modes. In this paper, we propose a numerical technique based on maps that transform the state of the system at the impact to the subsequent state at the next impact. This numerical method produces stability analyses of the fixed points of the map that describes an impact oscillation with multiple modes. These results can differ surprisingly from the expectations based on a single-mode solution. These results are compared with experiments undertaken in our laboratory, utilizing a thin stainless steel beam. The typical features of impact oscillations, which were theoretically predicted, were confirmed qualitatively.

Impact oscillations with multiple modes between a pantograph and an overhead rigid conductor line in a railway current collection system

2010 ◽  
Vol 18 (4) ◽  
pp. 499-508 ◽  
Author(s):  
Kiyotaka Yamashita ◽  
Kotaro Kitajo ◽  
Shou Wada ◽  
Toshihiko Sugiura ◽  
Hiroshi Yabuno
Keyword(s):  
Collection System ◽  
Multiple Modes ◽  
Current Collection ◽  
Conductor Line ◽  
Impact Oscillations

Fundamental Study on Impact Oscillations Between a Pantograph and an Overhead Rigid Conductor Line in a Railway Current Collection System

2008 ◽  
Author(s):  
Kotaro Kitajo ◽  
Masatsugu Yoshizawa ◽  
Satoshi Kawamura
Keyword(s):  
Contact Problems ◽  
The State ◽  
Fundamental Study ◽  
Current Collection ◽  
Railway System ◽  
Conductor Line ◽  
Impact Problems ◽  
The One ◽  
Relationship Of ◽  
Impact Oscillations

The contact problems between the rigid conductor line and the pantograph in a current railway system are studied from the viewpoint of nonlinear dynamics. It is assumed that there are impact oscillations between the rigid conductor line and the pantograph under the state of contact loss. The rigid conductor line pantograph system is modeled with a spring-supported beam excited by an oscillating body. First, we approached as an impact problem and theoretically examined by using this model. As a result, periodical impact oscillations were shown in low moving velocities of body. Second, we employed the method of mapping to clarify impact problems, and we obtained the relationship of the state of the system at the arbitrary impact to that at the next impact. Finally, the experiments are conducted with the simple experimental model using dimensionless parameters which are equal to the one of the analytical model.

scholarly journals Characteristic Evaluation of Corrosion of Aluminum-based Rigid Conductor Line

2007 ◽  
Vol 48 (2) ◽  
pp. 78-82
Author(s):  
Satoru MOHRI ◽  
Yusuke SATO ◽  
Kentaro NISHI
Keyword(s):  
Conductor Line

scholarly journals Undulating Wear Mechanism of Overhead Rigid Conductor Line

2006 ◽  
Vol 126 (2) ◽  
pp. 109-115 ◽  
Author(s):  
Mitsuo Aboshi ◽  
Hiroshi Nakaya ◽  
Hiroyuki Shoji
Keyword(s):  
Wear Mechanism ◽  
Conductor Line
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