453 A Possibility of Sound Monitoring for Railway Vehicle with Simplified System : A fundamental study for detection of derailment

2010 ◽  
Vol 2010 (0) ◽  
pp. _453-1_-_453-5_
Author(s):  
Takeo SHIROTORI ◽  
Toshihiro YASUNAGA
Keyword(s):  
Railway Vehicle ◽  
Fundamental Study ◽  
System A

scholarly journals Influence of Suspension Parameters Changes of a Railway Vehicle on Output Quantities

2019 ◽  
Vol 10 (1) ◽  
pp. 20-29 ◽  
Author(s):  
Ján Dižo ◽  
Miroslav Blatnický ◽  
Stasys Steišūnas ◽  
Gediminas Vaičiūnas
Keyword(s):  
Dynamic Response ◽  
Ride Comfort ◽  
Suspension System ◽  
Railway Vehicle ◽  
Running Safety ◽  
Suspension Parameters ◽  
System A ◽  
Dynamic Analyses ◽  
Computer Analyses ◽  
Important Input

Abstract This article deals with computer analyses of output quantities of a railway vehicle depending on changing of parameters of suspension system. A passenger car was chosen for dynamic analyses. An analysed passenger railway vehicle uses two stage suspension system composed of coil springs and hydraulic dampers. Stiffness of coil springs of primary and secondary suspensions were defined for two states and its influence on output values in terms of quality and quantity was evaluated. As output variables, values of forces in a wheel/rail contact and accelerations in several locations on a wagon body floor were chosen. Values of forces in a wheel/rail contact indicate dynamic response of a railway vehicle running in terms of running safety and values of accelerations serve as important input for evaluation of passenger ride comfort.

644 Fundamental Study on Noise Radiated from Gear Case of Railway Vehicle

2011 ◽  
Vol 2011 (0) ◽  
pp. _644-1_-_644-10_
Author(s):  
Minoru SASAKURA ◽  
Kiyoshi SATO ◽  
Satoru GOTO ◽  
Ryohei HIBINO
Keyword(s):  
Railway Vehicle ◽  
Fundamental Study ◽  
Gear Case

Predicting Acoustical Noise Generation in Complex Mechanical Systems

1979 ◽  
Vol 101 (2) ◽  
pp. 199-209 ◽  
Author(s):  
N. D. Perreira ◽  
S. Dubowsky
Keyword(s):  
Analytical Procedure ◽  
Mechanical Systems ◽  
Design Guidelines ◽  
Noise Generation ◽  
Noise Levels ◽  
Fundamental Study ◽  
Acoustic Design ◽  
System A ◽  
Modal Power ◽  
Complex Mechanical Systems

A fundamental study of noise generation in complex mechanical systems is undertaken. The objective of the study is the development of design guidelines for the prediction of mechanical system noise levels. Recently developed dynamical procedures are used to obtain the motions of linked mechanical systems with elastic elements and connection clearances. An analytical procedure for modeling the acoustical noise generated by complex mechanical systems is applied to a typical linked system, a four-bar mechanism. The far field acoustic pressure distribution is calculated and shown to be a function of many of the parameters under the control of the system designer. To aid the designer in producing quieter systems, acoustic design functions are developed. In particular, the system sound power and modal power efficiencies are found to be promising design tools.

scholarly journals Active Noise Control using a Virtual Error Microphone System. A Fundamental Study for Practical Application.

1996 ◽  
Vol 62 (601) ◽  
pp. 3459-3464 ◽  
Author(s):  
Shinji MATUOKA ◽  
Hajime KITAGAWA ◽  
Satoshi HORIHATA ◽  
Syunsuke ISHIMITU ◽  
Fumio TAMURA
Keyword(s):  
Noise Control ◽  
Active Noise Control ◽  
Practical Application ◽  
Fundamental Study ◽  
System A ◽  
Active Noise

A Fundamental Study on the Reversal Behavior of an Automobile Wiper Blade

2009 ◽  
Author(s):  
Masato Mizokami ◽  
Tsuneo Akuto ◽  
Takayuki Fukuda ◽  
Dai Yanagisawa ◽  
Masatsugu Yoshizawa
Keyword(s):  
Thin Layer ◽  
Dynamic Behavior ◽  
Analytical Model ◽  
Glass Surface ◽  
Water Layer ◽  
Fundamental Study ◽  
Fluid Force ◽  
The Real ◽  
System A ◽  
Time Histories

Automobile wiper systems provide a clear sight for drivers by creating a very thin layer of water about few dozen nano meters on a windshield. Several studies have been carried out to investigate the dynamic behavior of the wiper systems. However, there are few studies focused on reversal behavior of the wiper blade. Observation was conducted and analytical model is developed from the observation of the real wiper system. A water layer is considered in the analytical model between the wiper blade and the glass surface. The bottom of the model is assumed to always contact the water layer so that the fluid force is always applied. The dimensionless equations, which govern the wiping motion including the reversal behavior, were derived. The equations are discussed neglecting the nonlinear terms to understand the approximate movement and effect of the parameters. Moreover, the equation is solved numerically to obtain the time histories of the wiper blade. As a result, the effect of the fluid force, which acts on the wiper blade on the reversal behavior of the wiper blade, became clear.

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