Structural Dynamic Characteristics of Sidewall Contact System in Logging Instrument

doi:10.11885/j.issn.1674-5086.2018.07.10.02

Abstract

Abstract: To accurately understand the wall contact characteristics of microsphere plate during logging operation and to ensure stable and efficient microsphere focusing logging, a kinematic model of the primary transmission mechanism of the sidewall contact system was established. The model carried out kinematic computations by adopting the closed-loop vector chain method. Based on the above, static dynamic analysis was carried out for each bar member in the sidewall contact system. Motion and dynamic constraint equations governing all the transmission members of the microsphere sidewall contact system under different constraints were derived. The motion pattern of the higher pair mechanism of two pin chutes on the microsphere plate and the link arm were studied extensively; Further, the dynamic performance parameters of the sidewall contact plate and arm were also studied. Through ADAMS, a kinematic and dynamic simulation model of multi-rigid body was established for the microsphere sidewall contact system, and the kinematic and dynamic performances of the sidewall contact system were analyzed. By comparing the simulation results with those from the mathematical model of the microsphere sidewall contact system, the model was verified. Furthermore, the dynamic parameter curve and motion pattern of each transmission member of the microsphere sidewall contact system were obtained.

Key words: multi-rigid body system, planar multi-bar linkage, dynamic analysis, closed-loop vector chain method, microsphere focused logging instrument

CLC Number:

TE931

REN Tao, FENG Bin, SUN Wen, ZHANG Chunlin, TANG Daolin. Structural Dynamic Characteristics of Sidewall Contact System in Logging Instrument[J]. 西南石油大学学报(自然科学版), 2019, 41(5): 169-180.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2018.07.10.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2019/V41/I5/169

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