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Dynamics of a Nutating Mill with Charge-Structure Interaction
Thesis (MEng)--Stellenbosch University, 2026.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2026
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| _version_ | 1867613826094989312 |
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| access_status_str | Open Access |
| author | Janse van Vuuren, Hendrik Christoffel |
| author2 | Bredell, J. R. |
| author_browse | Bredell, J. R. Janse van Vuuren, Hendrik Christoffel |
| author_facet | Bredell, J. R. Janse van Vuuren, Hendrik Christoffel |
| author_sort | Janse van Vuuren, Hendrik Christoffel |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2026. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/136094 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:42:17.808Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2026 |
| publishDateRange | 2026 |
| publishDateSort | 2026 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/136094 Dynamics of a Nutating Mill with Charge-Structure Interaction Janse van Vuuren, Hendrik Christoffel Bredell, J. R. Coetzee, C. Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. Thesis (MEng)--Stellenbosch University, 2026. Janse van Vuuren, H. C. 2026. Dynamics of a Nutating Mill with Charge-Structure Interaction. Unpublished masters thesis. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/3b031e01-b2f2-47af-829d-59620ddf18ba Nutating mills achieve high-intensity particle motion without the gravitational limitations of conventional tumbling mills, yet their structural dynamics and charge-structure interactions remain poorly characterised. This study investigates the dynamic behaviour of a laboratory-scale nutating mill (NuMill) through experimental testing and a two-way coupled simulation combining multi-body dynamics and the discrete element method. The NuMill included vibration isolation mounts and chamber ribs to replicate industrial Hicom mill characteristics. Force, torque, and accelerations were measured under varying mounting, charge, and geometric conditions. The re-sults revealed that representing the charge in a ribbed chamber as a rigid mass, instead of the granular material that it is, overpredicts the crank pin force by 21 % and underpredicts the drive shaft torque by 82 % at 700 RPM. The coupled simulation predicted the experimental dynamic behaviour with good agreement, showing a 34 % overprediction of crank-pin force, a 25 % underprediction of drive-shaft torque and rigid body natural-frequency errors within 1 %. These findings confirm that structural flexibility and charge-structure coupling significantly affect operational loads. The validated framework developed, improves predictive capability for nutating mill design and operation, enabling enhanced mechanical reliability and informed parameter selection in industrial applications. Masters 2026-04-22T09:19:10Z 2026-04-22T09:19:10Z 2026-03 Thesis https://scholar.sun.ac.za/handle/10019.1/136094 en Stellenbosch University 107 pages : ill. application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Janse van Vuuren, Hendrik Christoffel Dynamics of a Nutating Mill with Charge-Structure Interaction |
| title | Dynamics of a Nutating Mill with Charge-Structure Interaction |
| title_full | Dynamics of a Nutating Mill with Charge-Structure Interaction |
| title_fullStr | Dynamics of a Nutating Mill with Charge-Structure Interaction |
| title_full_unstemmed | Dynamics of a Nutating Mill with Charge-Structure Interaction |
| title_short | Dynamics of a Nutating Mill with Charge-Structure Interaction |
| title_sort | dynamics of a nutating mill with charge structure interaction |
| url | https://scholar.sun.ac.za/handle/10019.1/136094 |
| work_keys_str_mv | AT jansevanvuurenhendrikchristoffel dynamicsofanutatingmillwithchargestructureinteraction |