Tram Type Influence on the Frequency Spectrum Character of the Subsoil Dynamic Response

2018 ◽  
Vol 1 (11) ◽  
pp. 98-102
Author(s):  
Martin STOLARIK
Keyword(s):  
Dynamic Response ◽  
Frequency Spectrum

scholarly journals Experimental Study on the Vibration of an Overhung Rotor with a Propagating Transverse Crack

2002 ◽  
Vol 9 (3) ◽  
pp. 91-104 ◽  
Author(s):  
S.A. Adewusi ◽  
B.O. Al-Bedoor
Keyword(s):  
Experimental Study ◽  
Steady State ◽  
Dynamic Response ◽  
Frequency Spectrum ◽  
Transverse Crack ◽  
Vibration Signal ◽  
Vibration Measurement ◽  
Side Load ◽  
Propagating Crack ◽  
Vibration Signatures

This paper presents an experimental study on the dynamic response of an overhung rotor with a propagating transverse crack. The effects of a propagating transverse crack and side load on the dynamic response of an overhung rotor are investigated in order to identify vibration signatures of a propagating crack in rotating shafts. Startup and steady state vibration signatures were analyzed and presented in the form of Bode plots, Frequency Spectrum Cascades, Frequency Spectrum Waterfalls and orbits. The startup results showed that crack reduces the critical speed and increases the vibration amplitude of the rotor system. It also excites 2X vibration in the startup vibration signatures. The steady state results showed that the propagating crack produces changes in vibration amplitudes of 1X and 2X vibration harmonics and excites 3X harmonic just before fracture. During crack propagation, 1X amplitude may increase or decrease depending on the location of the crack and the direction of vibration measurement while 2X amplitude always increases. The steady state vibration signal of a propagating crack also produces a two-loop orbit.

Significance of Elastance Variation on Respiratory System Dynamics

2002 ◽  
Author(s):  
A. M. Al-Jumaily ◽  
Y. Al-Fakhri
Keyword(s):  
Dynamic Response ◽  
System Dynamics ◽  
Frequency Spectrum ◽  
Respiratory System ◽  
Input Impedance ◽  
Airway Wall ◽  
Asymmetric Structures ◽  
Asthma Attack ◽  
Lung Structure ◽  
Recursion Formulas

The sensitivity of the respiratory system dynamic response to variations in the wall elastance is investigated. The acoustical approach is used to determine the impedance at the throat using impedance recursion formulas. Both symmetric and asymmetric structures are considered. The response of the lung structure indicates that when the airway wall elastance varies, as the case during an asthma attack, the overall normalized input impedance frequency spectrum could be used to give a reasonable signature for identifying such abnormality.

Human pilot dynamic response in flight and simulator.

1958 ◽  
Author(s):  
Edward Seckel ◽  
Ian A. M. Hall ◽  
Duane T. McRuer ◽  
David H. Weir
Keyword(s):  
Dynamic Response

Memory effects in the dynamic response of a random two-spin Ising system

1991 ◽  
Vol 1 (1) ◽  
pp. 63-77 ◽  
Author(s):  
M. Nifle ◽  
H. J. Hilhorst
Keyword(s):  
Dynamic Response ◽  
Memory Effects ◽  
Ising System

Dynamic response of a blue phase to an applied field

1992 ◽  
Vol 2 (10) ◽  
pp. 1803-1809
Author(s):  
V. K. Dolganov ◽  
G. Heppke ◽  
H.-S. Kitzerow
Keyword(s):  
Dynamic Response ◽  
Applied Field ◽  
Blue Phase
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