Analysis of plowing forces for a finite-width blade in dense, ocean bottom sand

Coyne, J. C.; Lewis, G.W.

doi:10.1109/oceans.1999.799690

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…The sand cone would result in soil-soil shear along the interface, which would increase the resistance to installation. A similar phenomenon was also shown in the work of Coyne and Lewis (1999), when investigating seabed ploughs. Their tests showed that nearly double the force was required when laterally displacing a flat wall in comparison to a plough blade with an angle of 40 o .…”

Section: R a F T 4 Development Of An Analytical Model To Predict The Base Component Of Installation Force And Torquesupporting

confidence: 82%

Using discrete element method (DEM) to create a cone penetration test (CPT)-based method to estimate the installation requirements of rotary-installed piles in sand

et al. 2020

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Deep foundations maybe used in a range of soil types where significant foundation resistance is required but their installation is often associated with disturbance due to noise and vibration. Greater restrictions on use in urban and offshore environments is now commonplace. Screw piles and rotary jacked straight shafted piles are two potential methods of silent piling that could be used as alternative foundation solution, but the effects of certain geometric and installation properties such as installation pitch i.e. the ratio between vertical displacement and rotation, on the required installation torque and force in sand are not well understood. In this paper the effects of installation pitch and base geometry on the installation requirements of a straight shafted pile are simulated in 3D using the discrete element method (DEM). The installation requirements of straight shafted piles into sand have been validated against centrifuge testing, in three different relative densities. The DEM shows reductions in installation force can be achieved by increasing the installation pitch or including a conical tip. An existing cone penetration test (CPT) based prediction method for installation requirements has been improved to include the effects of installation pitch and base geometry for rotary installed piles in sand.

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Section: R a F T 4 Development Of An Analytical Model To Predict The Base Component Of Installation Force And Torquesupporting

confidence: 82%

Using discrete element method (DEM) to create a cone penetration test (CPT)-based method to estimate the installation requirements of rotary-installed piles in sand

et al. 2020

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“…According to the force translation theorem, the three forces can be translated so that they converge at a point, and a total resultant force can be synthesized. Since the surfaces of the plowshare are exceptionally complex and diverse, this paper directly cites the relevant assumptions and the derivation process in study of [17] to simplify the simplified model of plow-soil interaction mechanics into a two-dimensional model, and the plowsoil mechanics model is shown in Fig. 2 [18].…”

Section: Force Analysis Of the Spar Plough 21 Force Analysis Of Ploug...mentioning

confidence: 99%

Parameter Optimization and Test of High-Speed Plough Based on Coupling EDEM and Recurdyn

2024

Teh. vjesn.

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Depress moldboard plow soil adhesion is gaining relevance in agricultural production due to its rising profitability for producers and its contribution to reducing environmental impacts. This study aimed at the effects of the different structural forms with moldboard plow soil adhesion on adhesion under the joint simulation system. The experiment was conducted at Qianjin in the village of Qianjin, municipality of Daqing, Heilongjiang, China. Using EDEM and Recurdyn to simulate the selected parameters and operating conditions, determine the optimal combination, the field test and simulation comparison verification, the association between. The optimized plough body structure resulted in a 10.86% decrease in the soil adhesion compared to the control, providing a viable alternative for moldboard plow soil adhesion.

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“…It has been shown in plowing force estimation studies (e.g. [28]) that Eq. 4 underestimates the plowing force as it ignores the shearing of the sidewalls and bottom surface as well as the effects of pore water flow.…”

Section: Equation Of Motion Governing Ice Gougingmentioning

confidence: 99%

Ice Gouge Depth Determination Via an Efficient Stochastic Dynamics Technique

Gazis¹,

Kougioumtzoglou

Patelli

2016

Journal of Offshore Mechanics and Arctic Engineering

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A simplified model of the motion of a grounding iceberg for determining the gouge depth into the seabed is proposed. Specifically, taking into account uncertainties relating to the soil strength, a nonlinear stochastic differential equation governing the evolution of the gouge length/depth in time is derived. Further, a recently developed Wiener path integral (WPI) based approach for solving approximately the nonlinear stochastic differential equation is employed; thus, circumventing computationally demanding Monte Carlo based simulations and rendering the approach potentially useful for preliminary design applications. The accuracy/reliability of the approach is demonstrated via comparisons with pertinent Monte Carlo simulation (MCS) data.

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Analysis of plowing forces for a finite-width blade in dense, ocean bottom sand

Cited by 5 publications

References 1 publication

Using discrete element method (DEM) to create a cone penetration test (CPT)-based method to estimate the installation requirements of rotary-installed piles in sand

Using discrete element method (DEM) to create a cone penetration test (CPT)-based method to estimate the installation requirements of rotary-installed piles in sand

Parameter Optimization and Test of High-Speed Plough Based on Coupling EDEM and Recurdyn

Ice Gouge Depth Determination Via an Efficient Stochastic Dynamics Technique

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