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Comments on “Drill-string horizontal dynamics with uncertainty on the frictional force” by T.G. Ritto, M.R. Escalante, Rubens Sampaio, M.B. Rosales [J. Sound Vib. 332 (2013) 145–153].
- Source :
-
Journal of Sound & Vibration . Dec2016, Vol. 384, p356-361. 6p. - Publication Year :
- 2016
-
Abstract
- This paper analyzes the mechanical and mathematical models in “Ritto et al. (2013) [1]”. The results are that: (1) the mechanical model is obviously incorrect; (2) the mathematical model is not complete; (3) the differential equation is obviously incorrect; (4) the finite element equation is obviously not discretized from the corresponding mathematical model above, and is obviously incorrect. A mathematical model of dynamics should include the differential equations, the boundary conditions and the initial conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0022460X
- Volume :
- 384
- Database :
- Academic Search Index
- Journal :
- Journal of Sound & Vibration
- Publication Type :
- Academic Journal
- Accession number :
- 118268428
- Full Text :
- https://doi.org/10.1016/j.jsv.2016.07.017