Dynamic Effects in Bernoulli-Euler Beams subject to a Moving Load with Variable Speed

2012 ◽  
Author(s):  
R. Bogacz ◽  
K. Frischmuth
Keyword(s):  
Moving Load ◽  
Variable Speed ◽  
Dynamic Effects

scholarly journals Track Dynamic Response At Low Frequencies – Dominant Frequencies

2015 ◽  
Vol 15 (2) ◽  
Author(s):  
Milan Moravčík ◽  
Martin Moravčík
Keyword(s):  
Dynamic Response ◽  
Moving Load ◽  
Low Frequency ◽  
Track Structure ◽  
Dynamic Effects ◽  
Low Frequencies ◽  
Frequency Area ◽  
Dominant Frequencies ◽  
40 Hz

Abstract The paper is devoted dynamic effects in the track structure - the quasi-static excitation due to moving load, as the important source for the response of track components in the low frequency area (0 Hz < f < 40 Hz). The low-frequency track (the rail) response is associated with periodicity of wheel sets, bogies, and carriages of passage trains, The periodicity of track loading is determined by so called dominant frequencies f(d) at a position x of the track.

Assessment of the Vibration Excitation and Optimization of Cylindrical Gears

2011 ◽  
Author(s):  
Bernd-Robert Ho¨hn ◽  
Michael Heider ◽  
Karsten Stahl ◽  
Michael Otto ◽  
Jens Bihr
Keyword(s):  
Load Capacity ◽  
High Load ◽  
Noise Generation ◽  
Variable Speed ◽  
Dynamic Effects ◽  
Calculation Methods ◽  
Gear Mesh ◽  
Cylindrical Gears ◽  
Resonance Behavior ◽  
High Load Capacity

Vibration and noise generation of gear stages is mainly caused by the excitation of the gear mesh. This excitation is significantly influenced by geometry of the tooth. Here, both the macro-geometry (main geometry) and the micro-geometry (flank corrections) of the teeth are important. Corrections of the tooth flanks usually have to meet the requirements of low excitation and high load capacity. Furthermore it is oftenly necessary, especially for transmissions with variable speed, to account for the dynamic effects (e.g. resonance behavior) of noise excitation. The computer program DZP (Dynamic Tooth Force Program) provides extensive calculation methods for analyzing mesh excitation and transmission dynamics. The frame program DZPopt provides extensive possibilities to determine an optimum excitation flank correction based on the calculation capabilities of DZP.

scholarly journals Dynamic analysis of beams on fractional viscoelastic foundation subject to a variable speed moving load

2019 ◽  
Vol 286 ◽  
pp. 01006
Author(s):  
A. Ouzizi ◽  
F. Abdoun ◽  
L. Azrar
Keyword(s):  
Finite Difference ◽  
Dynamic Response ◽  
Dynamic Analysis ◽  
Moving Load ◽  
Finite Difference Methods ◽  
Equation Of Motion ◽  
Viscoelastic Foundation ◽  
Variable Speed ◽  
Difference Methods ◽  
Stiffness And Damping

The present paper investigates the dynamic response of beams resting on fractional viscoelastic foundation subjected to a moving load with variable speeds. The Galerkin with finite difference methods are used to deal with the governing equation of motion. The effect of various parameters, like fractional order derivative, foundation stiffness and damping, speed of moving load on the response of the beam are investigated and discussed.

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