Abstract A crawler system provides much larger ground contact, leading to excellent terrain adaptability. Due its structural characteristics, high‐frequency vibration proportional the vehicle speed is generated during driving process. This a result of polygon and rolling effects between track wheels. field test tracked performed monitor movement signals chassis rocker arm. Their corresponding p...

Deep gas wells and fields have the characteristics of high pressure. The vibration tubing string during production causes to be subjected severe stress even dynamic fatigue failure. Therefore, this article is based on finite element theory, aiming at large-size strings in deep wells. mechanics model mathematical packer high-pressure were established, ANSYS software was re-developed. analysis pr...

The vortex-induced vibration (VIV) of flexible risers is a complex fluid–structure interaction (FSI) phenomenon. In this study, we conducted numerical simulation method based on the slicing to study deep-sea with different slenderness ratios and uniform flow velocities. combines finite element model riser structure two-dimensional field slices solved by Fluent solver. was realized self-compiled...