Open AccessDynamic Response Analysis of Tubular String under Perforating Gun-shock Loads
Author(s) -
Hongtao Liu,
Yihua Dou,
Liyuan Cao,
Yinping Cao,
Yanpeng Xue
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/3/032132
Subject(s) - acceleration , vibration , mechanics , shock (circulatory) , displacement (psychology) , string (physics) , cantilever , physics , finite element method , natural frequency , stress (linguistics) , shock response spectrum , structural engineering , classical mechanics , acoustics , engineering , medicine , linguistics , philosophy , quantum mechanics , psychotherapist , psychology
To obtain the dynamic response of perforating string under gun-shock loads, a dynamical model was established based on the vibration mechanics theory of cantilever beam, and the differential equations of longitudinal vibration were deduced. The dynamic response was obtained according to the measured data of impact loads. The results show that vibration response of displacement, velocity, and acceleration were changed with a cycle of 15ms. The Von Mises stress near the packer is the largest owing to stress concentration. The analytic solution of natural frequency is close to the finite element analysis value, and the maximum relative error is below 5%.The velocity of stress waves propagating along the string approximates 5000m/s, which is close to the theoretical analysis value and is about 3.6 times that of sound velocity in water.