Izlaganje sa skupa
https://doi.org/10.18048/2022.04.11
Analysis of Ship Propulsion Shafting Vibration Using Coupled Torsional-Bending Model
Alen Marijančević
orcid.org/0000-0002-8158-169X
; Faculty of Engineering University of Rijeka, Vukovarska 58, Rijeka, Croatia
Sanjin Braut
orcid.org/0000-0002-7565-2615
; Faculty of Engineering University of Rijeka, Vukovarska 58, Rijeka, Croatia
Roberto Žigulić
orcid.org/0000-0003-3052-6794
; Faculty of Engineering University of Rijeka, Vukovarska 58, Rijeka, Croatia
Sažetak
The paper describes a coupled torsional-bending model of ship propulsion system vibrations. The
developed model is based on the modified model of the Jeffcott rotor. In order to test the model and
determine the coupled torsional-bending vibrations, several cases were analyzed. First, a reference
case corresponding to a fully axisymmetric ship propulsion system is set up. Then, the influence of
the constant radial force in the vertical direction at the position of the stern bearing was analyzed,
such as the conditions of navigation of the ship at calm sea under partial or fully loaded hull. Finally,
the case of sailing on rough sea is analyzed, when the propeller racing occurs due to the stern lifting
out of the sea. For simplicity, the harmonic law of amplitude changing of the vertical radial force on
the stern tube bearing as well as of the propeller load was adopted. Based on the results of numerical
analysis, it was found that the proposed model well describes the case of coupling of torsional and
bending vibrations of the propulsion system.
Ključne riječi
Ship propulsion system; coupled torsional-bending vibration model; numerical analysis; propeller racing
Hrčak ID:
278706
URI
Datum izdavanja:
24.4.2022.
Posjeta: 443 *