Finite Element and Analytical Modelling of Ship Unloader
Апстракт
The paper deals with the mathematical modelling of the dynamic behavior of the structure of the ship unloader. It is given the procedure for formulation of the reduced dynamic model which retains the main aspects of the behavior of the structure and yet is simple enough to be performed with standard engineering tools. The approach is applied on the real bridge-type grab ship unloader but can also be used on similar complex structures. Initially, the complete structure is modelled with finite element software where the natural frequencies were obtained. This 3D model is reduced to an equivalent plane model of the sea-side part of the boom. The postulation of the analytical approach is based on the model of a simple beam with an overhang where dynamic analysis is concerned with the Rayleigh Ritz method for estimating the adopted admissible functions. The results of the modal analysis of the reduced mathematical model showed a small difference from the results of finite element analysis w...hich stands for the verification of the presented approach.
Кључне речи:
ship unloader / FEM analysis / mathematical modellingИзвор:
Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021., 2021, A.13-A.18Издавач:
- Kraljevo : Faculty of Mechanical and Civil Engineering
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200105 (Универзитет у Београду, Машински факултет) (RS-MESTD-inst-2020-200105)
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Zrnić, Nenad AU - Gašić, Vlada AU - Urošević, Marko AU - Arsić, Aleksandra PY - 2021 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4369 AB - The paper deals with the mathematical modelling of the dynamic behavior of the structure of the ship unloader. It is given the procedure for formulation of the reduced dynamic model which retains the main aspects of the behavior of the structure and yet is simple enough to be performed with standard engineering tools. The approach is applied on the real bridge-type grab ship unloader but can also be used on similar complex structures. Initially, the complete structure is modelled with finite element software where the natural frequencies were obtained. This 3D model is reduced to an equivalent plane model of the sea-side part of the boom. The postulation of the analytical approach is based on the model of a simple beam with an overhang where dynamic analysis is concerned with the Rayleigh Ritz method for estimating the adopted admissible functions. The results of the modal analysis of the reduced mathematical model showed a small difference from the results of finite element analysis which stands for the verification of the presented approach. PB - Kraljevo : Faculty of Mechanical and Civil Engineering C3 - Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021. T1 - Finite Element and Analytical Modelling of Ship Unloader EP - A.18 SP - A.13 UR - https://hdl.handle.net/21.15107/rcub_machinery_4369 ER -
@conference{ author = "Zrnić, Nenad and Gašić, Vlada and Urošević, Marko and Arsić, Aleksandra", year = "2021", abstract = "The paper deals with the mathematical modelling of the dynamic behavior of the structure of the ship unloader. It is given the procedure for formulation of the reduced dynamic model which retains the main aspects of the behavior of the structure and yet is simple enough to be performed with standard engineering tools. The approach is applied on the real bridge-type grab ship unloader but can also be used on similar complex structures. Initially, the complete structure is modelled with finite element software where the natural frequencies were obtained. This 3D model is reduced to an equivalent plane model of the sea-side part of the boom. The postulation of the analytical approach is based on the model of a simple beam with an overhang where dynamic analysis is concerned with the Rayleigh Ritz method for estimating the adopted admissible functions. The results of the modal analysis of the reduced mathematical model showed a small difference from the results of finite element analysis which stands for the verification of the presented approach.", publisher = "Kraljevo : Faculty of Mechanical and Civil Engineering", journal = "Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.", title = "Finite Element and Analytical Modelling of Ship Unloader", pages = "A.18-A.13", url = "https://hdl.handle.net/21.15107/rcub_machinery_4369" }
Zrnić, N., Gašić, V., Urošević, M.,& Arsić, A.. (2021). Finite Element and Analytical Modelling of Ship Unloader. in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021. Kraljevo : Faculty of Mechanical and Civil Engineering., A.13-A.18. https://hdl.handle.net/21.15107/rcub_machinery_4369
Zrnić N, Gašić V, Urošević M, Arsić A. Finite Element and Analytical Modelling of Ship Unloader. in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.. 2021;:A.13-A.18. https://hdl.handle.net/21.15107/rcub_machinery_4369 .
Zrnić, Nenad, Gašić, Vlada, Urošević, Marko, Arsić, Aleksandra, "Finite Element and Analytical Modelling of Ship Unloader" in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021. (2021):A.13-A.18, https://hdl.handle.net/21.15107/rcub_machinery_4369 .