Drilling study of bit in gravel environment based on <scp>DEM–MBD</scp>

Gao, Kuidong; Liu, Jihai; Wu, Tianjiao; Zeng, Qingliang; Sun, Liqing; Zhang, Xiaodi

doi:10.1002/eng2.12472

Cited by 4 publications

(3 citation statements)

References 42 publications

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“…This model has the benefits of high accuracy and high computational efficiency. DEM-MBD is a common method for simulating the motion of geometry in discrete particles [27] and [29]. The schematic diagram of DEM is shown in Fig.…”

Section: Simulation Modelmentioning

confidence: 99%

“…Table 1. The parameters of DEM [27] ρ In Table 1 ρ is the density, σ is Poisson's ratio, G is the shear modulus, η is the coefficient of restitution, μ S is the coefficient of static friction, and μ R is the coefficient of rolling friction.…”

Section: Fig 3 Simulation Model Of Drilling Bottom Hole Gravel With A...mentioning

confidence: 99%

“…This problem can be solved with the discrete element method and multi-body dynamic method (DEM-MBD) co-simulation. The DEM-MBD co-simulation is presently widely used in particle dynamics analysis [27], particle breakage experiment [28], and mechanical property analysis [29].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Dynamic Characteristics of Bit Anchor Cable Drilling in the Gravel Sediments of a Soft Rock Bottom Hole

Gao¹,

Liu²,

Zeng³

et al. 2023

sv-jme

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During the pore-forming stage of floor heave treatment, the phenomenon of gravel sediment accumulation in the bottom hole often occurs, which causes great difficulties in the normal installation of the anchor cable. Based on this observation, a new anchor cable installation method was proposed, which involves installing a drill bit at the front end of the anchor cable to assist its drilling. With the help of an anchor cable drilling test bench, the influence of the bit, motion parameters, and hole environment on the performance of anchor cable drilling was studied. Through the co-simulation of the discrete element method (i.e., multibody dynamics (DEM-MBD)), the drilling process of the bit anchor cable was simulated, and the dynamic characteristics of the bit anchor cable drilling in the bottom hole gravel sediment were analysed. The results show that installing a drill bit in front of the anchor cable can greatly reduce the drilling resistance and hamper torque during anchor cable drilling. When the rotational direction of the bit anchor cable is consistent with the spiral direction of the anchor cable, the bit anchor cable can exhibit better drilling performance. The drilling resistance and hindering torque of the bit anchor cable are the largest when drilling in soaked particles, followed by drilling in dry particles, and the smallest occurs when drilling in moist particles. The research results can provide reference for the parameter setting of anchor cable auxiliary installation equipment.

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Section: Simulation Modelmentioning

confidence: 99%

Section: Fig 3 Simulation Model Of Drilling Bottom Hole Gravel With A...mentioning

confidence: 99%

See 1 more Smart Citation

Study on the Dynamic Characteristics of Bit Anchor Cable Drilling in the Gravel Sediments of a Soft Rock Bottom Hole

Gao¹,

Liu²,

Zeng³

et al. 2023

sv-jme

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Influence of screw blades on the performance of a screw‐drive granary robot

Jin

et al. 2023

Journal of Field Robotics

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A granary robot with screw‐drive mechanisms can perfectly adapt to a loose grain terrain. The design of the helical wheels is significant for the driving performance of this robot. Because this robot moves due to the action of the blade on the grain, the parameters of the helical blade are especially important among all factors. Therefore, to determine the effect of blades on the performance of a screw‐drive granary robot, a screw robot–corn coupling model is established based on the coupling of the discrete element method and multibody dynamics. The model can analyze the interaction of the screw wheel with the grain particles. Then a robot with two helical wheels is designed, manufactured, and tested to verify the accuracy of the coupling model. The cosimulation created with this model has good accuracy compared with the experiment, and the mean relative errors of sinkage, velocity, and slip ratio are 3.43%, 1.21%, and 13.87%, respectively. Finally, the effects of the height, axial length, helix angle, and number of screw blades on the driving performance of the robot are studied with single‐factor simulations. The trends of the torque, slip, and drawbar efficiency varying with these parameters of the screw blade are obtained, which can provide critical insights for the preliminary design of a screwed granary robot.

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