AxialTorsionalDrillString

Code for the numerical experiments in "Axial and torsional self-excited vibrations of a distributed drill-string" JSV 2019 https://www.sciencedirect.com/science/article/pii/S0022460X1830854X

This repository contains MATLAB code for the analysis and simulation of axial-torsional vibrations in drill-string systems. The code models the stability and dynamic behavior of drill-strings under various conditions, focusing on the bit-rock interaction and boundary conditions.

Directory Structure

Each folder contains the code to run the corresponding experiments that are shown in the paper.

• Axial: Model with only the axial dynamics in the drill string, assuming constand torsional velocity
• Axial - nondim: Only axial dynamics in the non-dimensional formulation
• Coupled: Model with both axial and torsional dynamics
• Coupled - nondim: Axial-torsional model in the non-dim formulation

Key Files

• MAIN.m: Each experiment is run by executing a MAIN_[experimentName] file
• parameters.m: Simulation and parameters are specified here..
• stabilityMap.m: Generates stability maps.

License

This project is licensed under the MIT License.

Usage

Run simulations by executing MAIN_[experimentName].m in MATLAB within the desired directory.