{"id":"W3119384776","doi":"10.1016/j.apor.2020.102521","title":"Nonlinear integrated dynamic analysis of drill strings under stick-slip vibration","year":2021,"lang":"en","type":"article","venue":"Applied Ocean Research","topic":"Drilling and Well Engineering","field":"Engineering","cited_by":59,"is_retracted":false,"has_abstract":false,"ca_institutions":"Memorial University of Newfoundland","funders":"Memorial University of Newfoundland; Mitacs","keywords":"Drill string; Vibration; Nonlinear system; Torsional vibration; Engineering; Structural engineering; Drilling; Drill; Finite element method; Natural frequency; Dissipation; Modal analysis; Slip (aerodynamics); Mechanical engineering; Acoustics; Physics","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0004627033,0.0001459745,0.0003021461,0.0006462163,0.00006131735,0.00005818324,0.000180537,0.0001142818,0.0001091481],"category_scores_gemma":[0.00005395822,0.0001525723,0.00009248664,0.003045466,0.00005543678,0.00005444662,0.00006086189,0.0004558285,0.00003092218],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0001271631,"about_ca_system_score_gemma":0.00006669528,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00002254929,"about_ca_topic_score_gemma":0.00003972082,"domain_scores_codex":[0.9985408,0.00003156564,0.0003008146,0.0002616313,0.0004675956,0.000397588],"domain_scores_gemma":[0.9990504,0.0002227621,0.00002000585,0.0003746761,0.0002284686,0.0001037087],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"simulation_or_modeling","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.000008704792,0.0000366803,0.0001152069,0.00009648747,0.0006035875,0.000007831127,0.0001777654,0.925816,0.06915885,0.001901243,0.0001523107,0.001925335],"study_design_scores_gemma":[0.0001935786,0.00001348944,0.001051977,0.00002589548,0.0001064551,8.403072e-7,0.000514788,0.9409373,0.05619881,0.0002685947,0.0005293989,0.0001589241],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8342913,0.0002249318,0.1600569,0.0000418237,0.0001020484,0.0001451806,0.0000417565,0.0002838964,0.004812124],"genre_scores_gemma":[0.9963252,0.0001219355,0.002947198,0.000008627279,0.00003519564,0.000004676025,0.0002793144,0.00004703654,0.0002308313],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1620338,"threshold_uncertainty_score":0.6221716,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02071386064680893,"score_gpt":0.2843598215024225,"score_spread":0.2636459608556136,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}