A non-linear Cosserat rod model for drill-string dynamics in arbitrary borehole geometries with contact and friction

2019 ◽  
Vol 157-158 ◽  
pp. 98-110 ◽  
Author(s):  
H.E. Goicoechea ◽  
F.S. Buezas ◽  
M.B. Rosales
Keyword(s):  
Drill String ◽  
Cosserat Rod ◽  
Rod Model ◽  
Non Linear

A Preliminary Study of Soft Material Robotic Modelling: Finite Element Method and Cosserat Rod Model

2021 ◽  
Author(s):  
Rebecca Berthold ◽  
Max Niklas Bartholdt ◽  
Mats Wiese ◽  
Stephanie Kahms ◽  
Svenja Spindeldreier ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Soft Material ◽  
Cosserat Rod ◽  
Rod Model ◽  
Preliminary Study ◽  
Element Method

scholarly journals A coupled lattice Boltzmann and Cosserat rod model method for three-dimensional two-way fluid–structure interactions

AIP Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 075020
Author(s):  
Suguru Ando ◽  
Mitsuru Nishikawa ◽  
Masayuki Kaneda ◽  
Kazuhiko Suga
Keyword(s):  
Lattice Boltzmann ◽  
Three Dimensional ◽  
Fluid Structure Interactions ◽  
Fluid Structure ◽  
Model Method ◽  
Cosserat Rod ◽  
Rod Model

scholarly journals Integration of Nonlinear Models of Flexible Body Deformation in Multibody System Dynamics

2013 ◽  
Vol 9 (1) ◽  
Author(s):  
Martin Schulze ◽  
Stefan Dietz ◽  
Bernhard Burgermeister ◽  
Andrey Tuganov ◽  
Holger Lang ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Multibody System ◽  
Nonlinear Models ◽  
Equations Of Motion ◽  
Flexible Structures ◽  
General Purpose ◽  
Cosserat Rod ◽  
Rod Model ◽  
Flexible Deformation ◽  
Run Up

Current challenges in industrial multibody system simulation are often beyond the classical range of application of existing industrial simulation tools. The present paper describes an extension of a recursive order-n multibody system (MBS) formulation to nonlinear models of flexible deformation that are of particular interest in the dynamical simulation of wind turbines. The floating frame of reference representation of flexible bodies is generalized to nonlinear structural models by a straightforward transformation of the equations of motion (EoM). The approach is discussed in detail for the integration of a recently developed discrete Cosserat rod model representing beamlike flexible structures into a general purpose MBS software package. For an efficient static and dynamic simulation, the solvers of the MBS software are adapted to the resulting class of MBS models that are characterized by a large number of degrees of freedom, stiffness, and high frequency components. As a practical example, the run-up of a simplified three-bladed wind turbine is studied where the dynamic deformations of the three blades are calculated by the Cosserat rod model.

Non-Linear Finite Element Analysis of Contact-Impact between Drill String and Wellbore under Air Drilling

2011 ◽  
Vol 291-294 ◽  
pp. 1578-1581
Author(s):  
Ben Fu Yu ◽  
Xiang Zhen Yan ◽  
Xiu Juan Yang ◽  
Gen Sheng Li
Keyword(s):  
Finite Element ◽  
Drill Pipe ◽  
Drill String ◽  
Element Analysis ◽  
Linear Finite Element ◽  
Mechanics Model ◽  
Non Linear ◽  
Air Drilling ◽  
Contact Impact ◽  
Stress And Deformation

The dynamic mechanics model was built up to analyze the contact-impact between drill string and wellbore according to the characteristics of contact-impact, based on non-linear finite element method and Lagrange method. The dynamic mechanics equations were deduced by the dynamic mechanics model. The stress and deformation field of drill string with different parameters of bottom hole were obtained and tested by experiments and numerical simulation respectively. And also, the propagation laws of stress wave generated by contact-impact in drill pipe were studied. The comprehensive results indicate that the numerical results agree well with the actual dynamic process of contact-impact. The stress waves generated by contact-impact cause the change of stress. The contact-impact between drill string and wellbore under air drilling is the main reason for early drill string failure.

A Second Order Semi-Discrete Cosserat Rod Model Suitable for Dynamic Simulations in Real Time

2009 ◽  
Author(s):  
Holger Lang ◽  
Joachim Linn ◽  
Theodore E. Simos ◽  
George Psihoyios ◽  
Ch. Tsitouras
Keyword(s):  
Real Time ◽  
Second Order ◽  
Dynamic Simulations ◽  
Cosserat Rod ◽  
Rod Model
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