Free vibrations of nonuniform beams with rotational and translational restraints and subjected to an axial force

1989 ◽  
Vol 85 (3) ◽  
pp. 1368-1371 ◽  
Author(s):  
F. H. Yeh ◽  
W. H. Liu
Keyword(s):  
Axial Force ◽  
Free Vibrations

scholarly journals Some aspects of analysis of transverse free vibrations of uniform beams loaded with axial force

2018 ◽  
Vol 61 (2) ◽  
pp. 35-55
Author(s):  
Dijana Majstorović ◽  
Aleksandar Borković ◽  
Aleksandar Prokić ◽  
Radovan Vukomanović
Keyword(s):  
Axial Force ◽  
Free Vibrations

scholarly journals PLUCK TESTS ON OPERATING DEEPWATER PIPELINE SPANS

2020 ◽  
Author(s):  
Ralf Peek ◽  
Chiara A. Bernardo ◽  
Hui Min Hong ◽  
Conleth D. O’Loughlin ◽  
David White ◽  
...  
Keyword(s):  
Natural Frequency ◽  
Axial Force ◽  
Weak Link ◽  
Free Vibrations ◽  
Spring Stiffness ◽  
Subsea Pipeline ◽  
Vortex Induced Vibrations ◽  
Soil Damping ◽  
To Come

Key uncertainties in the assessment of subsea pipeline spans for fatigue due to vortex-induced vibrations (VIV) are the effective axial force, the soil spring stiffness, and the soil damping. To reduce these uncertainties, pluck tests have been carried out, to determine the natural frequency and damping of single and multiple spans. These are carried out by pulling the span laterally at midspan with the ROV, until a 6mm or 8mm PP rope that serves as a weak link in the connection from the pipeline and the ROV breaks. The free vibrations resulting from this pluck are measured with accelerometers attached to the pipeline. The paper presents selected results from these tests and their interpretation in terms modal frequencies and damping ratios. Already at the achieved amplitudes of vibration of up to about 0.01D, the results already show considerable nonlinearity and inelasticity that is thought to come from the soil supporting the pipe at the shoulders of the span, and can be captured in FE models by making the soil springs nonlinear and inelastic.

Free vibrations of the partial-interaction composite members with axial force

2007 ◽  
Vol 299 (4-5) ◽  
pp. 1074-1093 ◽  
Author(s):  
Yu-Fei Wu ◽  
Rongqiao Xu ◽  
Weiqiu Chen
Keyword(s):  
Axial Force ◽  
Free Vibrations ◽  
Partial Interaction

Method of determination of aerodynamic axial force acting on vehicle body and stabilizer on it

2001 ◽  
Vol 7 (1s) ◽  
pp. 89-92
Author(s):  
E.A. Ermolenko ◽  
◽  
Yu.V. Kamenchuk ◽  
Keyword(s):  
Axial Force ◽  
Vehicle Body ◽  
Method Of Determination

Cyclic Flexural Behavior of Steel Pipes Repaired by Patch Plate Subjected to Constant Axial Force

2012 ◽  
Vol 61 (6) ◽  
pp. 543-549 ◽  
Author(s):  
Kazuo FURUNISHI ◽  
Yasuo KITANE ◽  
Yoshito ITOH
Keyword(s):  
Axial Force ◽  
Flexural Behavior ◽  
Steel Pipes

Numerical analysis of free vibrations of rectangular plates based on different approaches

2019 ◽  
pp. 33-41
Author(s):  
Oleksandr Grigorenko ◽  
◽  
Maksym Borysenko ◽  
Olena Boychuk ◽  
Volodymyr Novytskyi ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Free Vibrations ◽  
Rectangular Plates

Development and testing of rolling cutter bit with a new arrangement of teeth on the balls

2020 ◽  
pp. 60-68
Author(s):  
V. A. Pyalchenkov ◽  
D. V. Pyalchenkov
Keyword(s):  
Axial Force ◽  
Axial Load ◽  
Vertical Line ◽  
Ball Joint ◽  
Line Passing

Research has found that the axial load applied to the bit is distributed unevenly along the crowns of the balls. The middle crowns are the busiest. The value of the axial force perceived by a separate ring is associated with the deformation of the details of the ball joint. You can reduce the uneven loading of crowns by shifting them along the ball along the radius of the bit, placing them so that the vertical line passing through the center of the lower ball of the lock bearing passes through the middle of the gap between the crowns of neighboring balls. The bits with the new option of placing the teeth on the balls were tested on the stand and in industrial conditions. For the bits of this design, the axial load was distributed more evenly over the crowns, which allowed increasing the efficiency of their work.

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