Contents
Class guideline — DNVGL-CG-0137. Edition July 2019 Page 4
Strength analysis of hull structure in RO/RO vessels
DNV GL AS
CONTENTS
Changes – current.................................................................................................. 3
Section 1 Introduction............................................................................................ 5
1 Definitions........................................................................................... 5
2 General................................................................................................ 5
3 Objectives............................................................................................ 5
4 Vessel categorisation...........................................................................5
5 Operational considerations.................................................................. 8
6 Critical items and areas.......................................................................8
Section 2 Hull girder strength...............................................................................10
1 Hull girder bending strength............................................................. 10
2 Hull girder shear strength................................................................. 10
Section 3 Local strength....................................................................................... 11
1 Hinged designs.................................................................................. 11
Section 4 Primary supporting member (PSM) assessment....................................12
1 FE partial ship model.........................................................................12
Section 5 Global racking strength analysis........................................................... 16
1 Modelling........................................................................................... 16
2 Loads and load application................................................................ 17
3 Balancing of global FE model.............................................................19
Section 6 Docking analysis....................................................................................20
1 Modelling and load application.......................................................... 20
2 Critical structure................................................................................ 20
3 Aft structure...................................................................................... 20
Section 7 Local fe models..................................................................................... 21
1 General.............................................................................................. 21
2 Sub-modelling.................................................................................... 21
Section 8 Fatigue assessment............................................................................... 22
1 Fatigue capacity and strength representation.................................. 22
Changes – historic................................................................................................ 24
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