TY - JOUR N2 - Sensitivity analysis of the dynamic response of both the designed and the actual models of a slewing superstructure with two masts to the variation of the counterweight mass and the degree of accuracy of the approximation polynomials of the digging resistance was conducted in the paper. Spatial reduced dynamic models of the bucket wheel excavator SchRs 1600 were used as a basis for the presented investigations. Based on the comparative analysis of the calculation results, the following conclusions were drawn: (a) mass of the counterweight has a significantly higher influence on the maximum intensities of accelerations of the referent points than on the spectrum of natural frequencies, (b) the accuracy of approximations of the digging resistance and the maximum values of accelerations differ by an order of magnitude, for the approximation trigonometric polynomial of the same number of harmonics. L1 - http://www.journals.pan.pl/Content/107152/PDF/Archiwum-63-2-16-Gniatovic.pdf L2 - http://www.journals.pan.pl/Content/107152 PY - 2018 IS - No 2 DO - 10.24425/122909 KW - bucket wheel excavator KW - dynamic response KW - counterweight mass variation KW - digging resistance approximation A1 - Gnjatović, Nebojša A1 - Bošnjak, Srđan A1 - Stefanović, Aleksandar PB - Committee of Mining PAS VL - vol. 63 DA - 2018.06.30 T1 - The Dependency of the Dynamic Response of a Two Mast Bucket Wheel Excavator Superstructure on the Counterweight Mass and the Degree of Fourier Approximation of the Digging Resistance UR - http://www.journals.pan.pl/dlibra/publication/edition/107152 T2 - Archives of Mining Sciences ER -