Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets
Само за регистроване кориснике
2020
Чланак у часопису (Објављена верзија)
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Приказ свих података о документуАпстракт
An original method for validation of the number of buckets on the working device of a bucket wheel excavator based on the dynamic response of its slewing superstructure (SS) is presented. A set of 16 seemingly acceptable solutions which satisfied the rigid design restrictions, based on the preservation of the existing (a) bucket wheel drivetrain, (b) theoretical capacity, (c) characteristics of the excavated soil and (d) position of the superstructure centre of gravity (CoG), was analysed. Already on the basis of the limiting vertical and lateral accelerations of the bucket wheel centre, which represents a well-grounded indicator of its dynamic behaviour prescribed by the code DIN 22261-2, 14 out of 16 analysed design variants have been discarded, reducing the set of possible solutions to only two - the originally-designed variant (with 17 buckets), and the variant with 20 buckets. Conclusions on the validity of these two design variants were derived on the basis of the dynamic respons...e analysis of the referent points of the SS. The analysis of the impact of soiling on the dynamic response of the SS has shown that negative dynamic effects, observed in the preceding analysis of the originally-designed solution, increase with the amount of the adhered material. Although the redesigned variant with 20 buckets has proven as the only suitable solution from the standpoint of dynamic behaviour of the SS, the results have to be assessed carefully due to the fact that the reduction of the mass of the bucket wheel steel structure by more than 14% leads to the appearance of unfavourable dynamic effects, even though the SS CoG position is preserved.
Кључне речи:
Slewing superstructure / Number of buckets / Limiting accelerations / Dynamic response / Bucket wheel excavatorИзвор:
Engineering Structures, 2020, 225Издавач:
- Elsevier Sci Ltd, Oxford
Финансирање / пројекти:
- the Science Fund of the Republic of Serbia funded project IDEAS
DOI: 10.1016/j.engstruct.2020.111313
ISSN: 0141-0296
WoS: 000589889100001
Scopus: 2-s2.0-85091665374
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Gnjatović, Nebojša AU - Bošnjak, Srđan AU - Milenović, Ivan Lj. AU - Stefanović, Aleksandar Z. PY - 2020 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3337 AB - An original method for validation of the number of buckets on the working device of a bucket wheel excavator based on the dynamic response of its slewing superstructure (SS) is presented. A set of 16 seemingly acceptable solutions which satisfied the rigid design restrictions, based on the preservation of the existing (a) bucket wheel drivetrain, (b) theoretical capacity, (c) characteristics of the excavated soil and (d) position of the superstructure centre of gravity (CoG), was analysed. Already on the basis of the limiting vertical and lateral accelerations of the bucket wheel centre, which represents a well-grounded indicator of its dynamic behaviour prescribed by the code DIN 22261-2, 14 out of 16 analysed design variants have been discarded, reducing the set of possible solutions to only two - the originally-designed variant (with 17 buckets), and the variant with 20 buckets. Conclusions on the validity of these two design variants were derived on the basis of the dynamic response analysis of the referent points of the SS. The analysis of the impact of soiling on the dynamic response of the SS has shown that negative dynamic effects, observed in the preceding analysis of the originally-designed solution, increase with the amount of the adhered material. Although the redesigned variant with 20 buckets has proven as the only suitable solution from the standpoint of dynamic behaviour of the SS, the results have to be assessed carefully due to the fact that the reduction of the mass of the bucket wheel steel structure by more than 14% leads to the appearance of unfavourable dynamic effects, even though the SS CoG position is preserved. PB - Elsevier Sci Ltd, Oxford T2 - Engineering Structures T1 - Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets VL - 225 DO - 10.1016/j.engstruct.2020.111313 ER -
@article{ author = "Gnjatović, Nebojša and Bošnjak, Srđan and Milenović, Ivan Lj. and Stefanović, Aleksandar Z.", year = "2020", abstract = "An original method for validation of the number of buckets on the working device of a bucket wheel excavator based on the dynamic response of its slewing superstructure (SS) is presented. A set of 16 seemingly acceptable solutions which satisfied the rigid design restrictions, based on the preservation of the existing (a) bucket wheel drivetrain, (b) theoretical capacity, (c) characteristics of the excavated soil and (d) position of the superstructure centre of gravity (CoG), was analysed. Already on the basis of the limiting vertical and lateral accelerations of the bucket wheel centre, which represents a well-grounded indicator of its dynamic behaviour prescribed by the code DIN 22261-2, 14 out of 16 analysed design variants have been discarded, reducing the set of possible solutions to only two - the originally-designed variant (with 17 buckets), and the variant with 20 buckets. Conclusions on the validity of these two design variants were derived on the basis of the dynamic response analysis of the referent points of the SS. The analysis of the impact of soiling on the dynamic response of the SS has shown that negative dynamic effects, observed in the preceding analysis of the originally-designed solution, increase with the amount of the adhered material. Although the redesigned variant with 20 buckets has proven as the only suitable solution from the standpoint of dynamic behaviour of the SS, the results have to be assessed carefully due to the fact that the reduction of the mass of the bucket wheel steel structure by more than 14% leads to the appearance of unfavourable dynamic effects, even though the SS CoG position is preserved.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Engineering Structures", title = "Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets", volume = "225", doi = "10.1016/j.engstruct.2020.111313" }
Gnjatović, N., Bošnjak, S., Milenović, I. Lj.,& Stefanović, A. Z.. (2020). Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets. in Engineering Structures Elsevier Sci Ltd, Oxford., 225. https://doi.org/10.1016/j.engstruct.2020.111313
Gnjatović N, Bošnjak S, Milenović IL, Stefanović AZ. Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets. in Engineering Structures. 2020;225. doi:10.1016/j.engstruct.2020.111313 .
Gnjatović, Nebojša, Bošnjak, Srđan, Milenović, Ivan Lj., Stefanović, Aleksandar Z., "Bucket wheel excavators: Dynamic response as a criterion for validation of the total number of buckets" in Engineering Structures, 225 (2020), https://doi.org/10.1016/j.engstruct.2020.111313 . .