Preliminary communication
https://doi.org/10.18048/2022.04.07
Definition of Deformations and Stresses of Large Ship Blocks within Transportation and Manipulation
Davor Bolf
orcid.org/0000-0001-5266-2194
; University of Rijeka – Faculty of Engineering; Vukovarska 58, 51000 Rijeka, Croatia
Marko Hadjina
orcid.org/0000-0001-7131-4750
; University of Rijeka – Faculty of Engineering; Vukovarska 58, 51000 Rijeka, Croatia
Albert Zamarin
orcid.org/0000-0003-2691-5973
; University of Rijeka – Faculty of Engineering; Vukovarska 58, 51000 Rijeka, Croatia
Mario Iveković
; University of Rijeka – Faculty of Engineering; Vukovarska 58, 51000 Rijeka, Croatia
Abstract
Deformations and stresses during the transport and manipulation of large ship blocks within ship
assembly and erection stages are a common and significant issue, particularly in the construction of
complex ships and variable production mix, as is the case in many European shipyards. The appearance
of deformations and stresses requires adequate addressing with the aim of their early determination and
reduction with a goal to reduce a significant number of working hours spent for the large ship blocks
transport preparation, for the transport and manipulation itself, and for the reworks. The appearance of
residual stress in blocks that are not adequately addressed can be an issue in the exploitation, reducing
the quality and ship service life. In this paper, the authors present the procedure of determining
deformations and stresses in the large ship block. The procedure is based on computer modelling and
numerical analysis of the selected ship block. Various scenarios of the foundations’ arrangement and
the arrangement of the transport hooks were analysed, and the optimal solutions were proposed. The
procedure allows determining deformations and stresses at an early stage of ship technology design
to define the adequate preparation for ship block foundations layout, transportation and manipulation
before production starts. In doing so, it is expected to reduce deformations and stresses itself, necessary
working hours for block accommodation, transportation and manipulation and to reduce repair works.
Such procedure application is expected to raise the efficiency of the overall ship production process
and the quality of the final product. Finally, further research is proposed regarding various scenarios
of technological procedures, ship blocks structures or used materials.
Keywords
Shipbuilding; deformations; stresses; transport of large ship blocks; 3D Experience model; numerical analysis; efficiency
Hrčak ID:
278665
URI
Publication date:
24.4.2022.
Visits: 400 *