Spatial reduced dynamic model of a bucket wheel excavator with two masts
Апстракт
A holistic approach to analyzing the dynamic behaviour of a bucket wheel excavator (BWE) superstructure, which is practically neglected by technical regulations but nowadays widely used during their design and redesign, is presented in the paper. The procedure for determining the potential and kinetic energy and the vector of generalized non-potential forces of the system, leading to the development of a reduced spatial dynamic (RD) model of the BWE with two masts is presented in detail. Direct validation of the established model has been performed by comparing the values obtained for the first ten natural frequencies (NFs) of the finite element (FE) model to those obtained by the RD model. Percent deviations of values of the NFs obtained for the RD model are very low compared to those obtained by the FE model (~1% for three fundamental NFs). Indirect validation of the RD model used in this research i.e. validation of values of the NFs which have been obtained by calculation and the re...spective modal deflection shapes has been achieved by comparing them to the studies containing the results of numerical-experimental research on the dynamic characteristics of BWEs of the same design concept. The values of NFs are of the same order of magnitude and the corresponding deflection shapes are in full compliance with those of the experimentally-analyzed BWEs.
Кључне речи:
Validation / Reduced spatial dynamic model / Modal analysis / Dynamic behavior / Bucket wheel excavatorИзвор:
Lecture Notes in Mechanical Engineering, 2019, 215-235Издавач:
- Pleiades journals
Финансирање / пројекти:
- Одрживост и унапређење машинских система у енергетици и транспорту применом форензичког инжењерства, еко и робуст дизајна (RS-MESTD-Technological Development (TD or TR)-35006)
Колекције
Институција/група
Mašinski fakultetTY - CHAP AU - Gnjatović, Nebojša AU - Bošnjak, Srđan AU - Zrnić, Nenad PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3238 AB - A holistic approach to analyzing the dynamic behaviour of a bucket wheel excavator (BWE) superstructure, which is practically neglected by technical regulations but nowadays widely used during their design and redesign, is presented in the paper. The procedure for determining the potential and kinetic energy and the vector of generalized non-potential forces of the system, leading to the development of a reduced spatial dynamic (RD) model of the BWE with two masts is presented in detail. Direct validation of the established model has been performed by comparing the values obtained for the first ten natural frequencies (NFs) of the finite element (FE) model to those obtained by the RD model. Percent deviations of values of the NFs obtained for the RD model are very low compared to those obtained by the FE model (~1% for three fundamental NFs). Indirect validation of the RD model used in this research i.e. validation of values of the NFs which have been obtained by calculation and the respective modal deflection shapes has been achieved by comparing them to the studies containing the results of numerical-experimental research on the dynamic characteristics of BWEs of the same design concept. The values of NFs are of the same order of magnitude and the corresponding deflection shapes are in full compliance with those of the experimentally-analyzed BWEs. PB - Pleiades journals T2 - Lecture Notes in Mechanical Engineering T1 - Spatial reduced dynamic model of a bucket wheel excavator with two masts EP - 235 SP - 215 DO - 10.1007/978-3-030-04975-1_26 ER -
@inbook{ author = "Gnjatović, Nebojša and Bošnjak, Srđan and Zrnić, Nenad", year = "2019", abstract = "A holistic approach to analyzing the dynamic behaviour of a bucket wheel excavator (BWE) superstructure, which is practically neglected by technical regulations but nowadays widely used during their design and redesign, is presented in the paper. The procedure for determining the potential and kinetic energy and the vector of generalized non-potential forces of the system, leading to the development of a reduced spatial dynamic (RD) model of the BWE with two masts is presented in detail. Direct validation of the established model has been performed by comparing the values obtained for the first ten natural frequencies (NFs) of the finite element (FE) model to those obtained by the RD model. Percent deviations of values of the NFs obtained for the RD model are very low compared to those obtained by the FE model (~1% for three fundamental NFs). Indirect validation of the RD model used in this research i.e. validation of values of the NFs which have been obtained by calculation and the respective modal deflection shapes has been achieved by comparing them to the studies containing the results of numerical-experimental research on the dynamic characteristics of BWEs of the same design concept. The values of NFs are of the same order of magnitude and the corresponding deflection shapes are in full compliance with those of the experimentally-analyzed BWEs.", publisher = "Pleiades journals", journal = "Lecture Notes in Mechanical Engineering", booktitle = "Spatial reduced dynamic model of a bucket wheel excavator with two masts", pages = "235-215", doi = "10.1007/978-3-030-04975-1_26" }
Gnjatović, N., Bošnjak, S.,& Zrnić, N.. (2019). Spatial reduced dynamic model of a bucket wheel excavator with two masts. in Lecture Notes in Mechanical Engineering Pleiades journals., 215-235. https://doi.org/10.1007/978-3-030-04975-1_26
Gnjatović N, Bošnjak S, Zrnić N. Spatial reduced dynamic model of a bucket wheel excavator with two masts. in Lecture Notes in Mechanical Engineering. 2019;:215-235. doi:10.1007/978-3-030-04975-1_26 .
Gnjatović, Nebojša, Bošnjak, Srđan, Zrnić, Nenad, "Spatial reduced dynamic model of a bucket wheel excavator with two masts" in Lecture Notes in Mechanical Engineering (2019):215-235, https://doi.org/10.1007/978-3-030-04975-1_26 . .