Spelling suggestions: "subject:"soil tripping"" "subject:"soil gripping""
1 |
Assessment of equipment performance variables for improved management during tillage operationsKichler, Corey Mitchell, Zech, Wesley C., January 2008 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2008. / Abstract. Vita. Includes bibliographical references (p. 115-122).
|
2 |
Optimising the performance of an oscillatory subsoiler /Shahgholy, Gholamhossein. Unknown Date (has links)
Thesis (PhD)--University of South Australia, 2007.
|
3 |
Discrete element modeling of a vibratory subsoiler /Van der Linde, Jaco. January 2007 (has links)
Thesis (MScIng)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.
|
4 |
Force modelling and energy optimization ofor subsoilers in tandemKasisira, Levi Lukoda. January 2004 (has links)
Thesis (Ph.D.)(Civil Engineering)--University of Pretoria, 2005. / Includes summary. Includes bibliographical references.
|
5 |
Discrete element modeling of a vibratory subsoilerVan der Linde, Jaco 12 1900 (has links)
Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2007. / Vibrating a tillage tool is an effective way of reducing the draft force required
to pull it through the soil. The degree of draft force reduction is dependent on the
combination of operating parameters and soil conditions. It is thus necessary to
optimize the vibratory implement for different conditions.
Numerical modelling is more flexible than experimental testing and analytical
models, and less costly than experimental testing. The Discrete Element Method
(DEM) was specifically developed for granular materials such as soils and can be
used to model a vibrating tillage tool for its design and optimization. The goal
was thus to evaluate the ability of DEM to model a vibratory subsoiler and to
investigate the cause of the draft force reduction.
The DEM model was evaluated against data obtained from field testing done
with a full scale single tine vibratory subsoiler. Soil testing was also done for
material characterization and for the calibration of DEM material properties.
The subsoiler was simulated using a commercial code, PFC3D. The effect on
the simulation results of particle diameter, different bonding models and damping
models was investigated. The final simulations were evaluated against the experimental
results in terms of the draft force and material behaviour. The cause of
the draft force reduction due to vibration was also investigated with the aid of the
DEM model.
From the results it was concluded that DEM is able to model the vibratory
subsoiler for its design and optimization. The DEM model also provided valuable
insight into the cause of the draft force reduction such as the increased peak stresses
due to vibration and the increase in particle kinetic energy.
|
6 |
Working Backwards: Enhancing Forest Restoration by Reversing Effects of Surface Mine Reclamation on Soil Bulk Density and Soil ChemistryBack, Michael Patrick 18 May 2021 (has links)
No description available.
|
Page generated in 0.0545 seconds