The Need for High Frequency Vibration Measurement Along With Dynamics Modeling to Understand the Genesis of PDC Bit Damage

2014 ◽  
Author(s):  
Hatem Oueslati ◽  
Andreas Hohl ◽  
Navish Makkar ◽  
Thorsten Schwefe ◽  
Christian Herbig
Keyword(s):  
High Frequency ◽  
Vibration Measurement ◽  
Dynamics Modeling ◽  
High Frequency Vibration ◽  
Pdc Bit

scholarly journals Health Monitoring Based on High Frequency Vibration Measurement with Laser

2011 ◽  
Vol 77 (777) ◽  
pp. 1760-1771 ◽  
Author(s):  
Daisuke MIYAMOTO ◽  
Itsuro KAJIWARA ◽  
Naoki HOSOYA ◽  
Chiaki NISHIDOME
Keyword(s):  
Health Monitoring ◽  
High Frequency ◽  
Vibration Measurement ◽  
High Frequency Vibration

New Insights Into Drilling Dynamics Through High-Frequency Vibration Measurement and Modeling

2013 ◽  
Author(s):  
Hatem Oueslati ◽  
Jayesh R. Jain ◽  
Hanno Reckmann ◽  
L.W. Ledgerwood ◽  
Rolf Pessier ◽  
...  
Keyword(s):  
High Frequency ◽  
Vibration Measurement ◽  
High Frequency Vibration

scholarly journals 656 Health Monitoring based on High Frequency Vibration Measurement with Laser

2010 ◽  
Vol 2010 (0) ◽  
pp. _656-1_-_656-6_
Author(s):  
Daisuke MIYAMOTO ◽  
Itsuro KAJIWARA ◽  
Naoki HOSOYA ◽  
Takahito KOGAWA ◽  
Yasutaka SAKURAI
Keyword(s):  
Health Monitoring ◽  
High Frequency ◽  
Vibration Measurement ◽  
High Frequency Vibration

scholarly journals Vertical Track Irregularity Influence on the Wheel High-Frequency Vibration in Wheel-Rail System

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Yang Lei ◽  
Xinyu Tian ◽  
Falin Qi ◽  
Dongsheng Chen ◽  
Tian Tian
Keyword(s):  
High Frequency ◽  
Natural Frequencies ◽  
Vertical Vibration ◽  
Vibration Measurement ◽  
Central Difference ◽  
Nonlinear Simulation ◽  
Contact Parameter ◽  
High Frequency Vibration ◽  
Rail System ◽  
Track Irregularity

A three-dimensional deformable finite element model of wheel-rail system is established. The vertical vibration natural frequencies are calculated by modal analysis. The improved central difference method by ABAQUS explicit nonlinear dynamics module is chosen to calculate the vertical vibration of wheel axle. Through the vibration measurement experiment ofLMAwheel by China Academy of Railway Sciences, the contact parameter is optimized and the model is modified. According to the nonlinear simulation results, the important influence of vertical track irregularity on the wheel set high-frequency vibration is discovered. The advantage frequencies through spectrum are close to the vertical vibration natural frequencies of seventh, eighth, ninth, and tenth mode. When the velocity is 350 km/h, system’s nonlinear dynamic characteristic is higher than the results at 200 km/h. The critical wavelength of vertical track irregularity on the wheel vertical vibration is about 0.8 m. In addition, a particular attention should be paid to one situation that the main dominant frequency amplitude is more than 50% of the acceleration amplitude even if the peak acceleration is low.

scholarly journals Loose Bolt Detection by High Frequency Vibration Measurement with Non-Contact Laser Excitation

2011 ◽  
Vol 5 (8) ◽  
pp. 1559-1571 ◽  
Author(s):  
Itsuro KAJIWARA ◽  
Daisuke MIYAMOTO ◽  
Naoki HOSOYA ◽  
Chiaki NISHIDOME
Keyword(s):  
High Frequency ◽  
Laser Excitation ◽  
Vibration Measurement ◽  
High Frequency Vibration ◽  
Loose Bolt Detection
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