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Pregled bibliografske jedinice broj: 88084

Racking Analysis of Livestock Carrier -Detailed Stress Analysis


Žanić, Vedran; Jančijev, Tomislav; Andrić, Jerolim; Frank, Darko
Racking Analysis of Livestock Carrier -Detailed Stress Analysis, 2001. (elaborat).


Naslov
Racking Analysis of Livestock Carrier -Detailed Stress Analysis

Autori
Žanić, Vedran ; Jančijev, Tomislav ; Andrić, Jerolim ; Frank, Darko

Izvornik
FSB-Elaborat

Vrsta, podvrsta
Ostale vrste radova, elaborat

Godina
2001

Ključne riječi
Livestock carrier; MAESTRO modeling; detail stress analysis

Sažetak
Faculty of Mech. Eng. and Naval Arch. has performed 3D FEM analysis of Yard 428 using MAESTRO software available at University of Zagreb. The coarse-mesh, symmetric, livestock carrier FE model was developed between frames 51 and 176 according to RINA Rules 2000 requirements (Pt B Ch 7, App 1). It simultaneously gives insight into relevant critical areas in the transverse structure caused by the transverse racking induced forces. Ship 3D FEM has 32048 nodes and 22098 macroelements. Loading condition 5 and 6 (departure and arrival) were adjusted to R.I.N.A requirements for racking loads. Pressures were calculated by R.I.N.A Rules 2000 Pt B, Ch 5 Sec 4 case d. All masses (light ship, livestock, etc.) were given corresponding accelerations based on the acceleration vector components calculated from Pt B, Ch 5 Sec 3. Livestock masses were concentrated in mesh nodes of the corresponding decks. Details are given in Report ULJ 428 / FINAL. This Report presents results of calculations with the fine mesh model of the requested detail - hole at Fr.101-side, (above deck 6). MAESTRO Detail Stress Analysis (DSA) using "top down approach" was applied. Boundary conditions to DSA model were automatically transferred from MAESTRO global model. In Figs. 1 and 2 complete bulkhead at Fr 101 (undeformed and deformed), taken from the global model, is presented. In Fig. 3 presents implementation of the fine mesh model into global mesh model. In Fig. 4 fine mesh model together with zoomed hole area is given. Fig. 5 presents deformations of the portside fine mesh model for LC1. Figs 6 and 7 present von Mises (HMH) and maximal (principal) stresses of the portside fine mesh model for LC1. Maximal recorded stresses are : HMH = 189 N/mm2 max = -208 N/mm2 . Figs 8 and 9 present von Mises (HMH) and maximal (principal) stresses of the starboard side fine mesh model for LC1. Maximal recorded stresses are : HMH = 253 N/mm2 max = 273 N/mm2 . Figs 10 and 11 present von Mises (HMH) and maximal (principal) stresses of the portside fine mesh model for LC2. Maximal recorded stresses are : HMH = 135 N/mm2 max = -155 N/mm2 . Figs 12 and 13 present von Mises (HMH) and maximal (principal) stresses of the starboard side fine mesh model for LC2. Maximal recorded stresses are : HMH = 191 N/mm2 max = 201 N/mm2 . Due to high stresses recorded in LC1 that are above permitted stresses for given material, it is recommended to insert patch of higher grade material in the area around hole.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja



POVEZANOST RADA


Projekt / tema
120023

Ustanove
Fakultet strojarstva i brodogradnje, Zagreb