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Examination of the intact stability and the seakeeping behaviour

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Contents<br />

List <strong>of</strong> Figures<br />

List <strong>of</strong> Tables<br />

V<br />

VII<br />

1 Introduction 1<br />

1.1 Key data <strong>of</strong> <strong>the</strong> three examined accidents . . . . . . . . . . . . . . . . . . . . . . 1<br />

1.1.1 Accident <strong>of</strong> <strong>the</strong> CMS Chicago Express [1] . . . . . . . . . . . . . . . . 1<br />

1.1.2 Accident <strong>of</strong> a 2468 TEU container vessel [2] . . . . . . . . . . . . . . . . 2<br />

1.1.3 Accident <strong>of</strong> a 2500 TEU container vessel [3] . . . . . . . . . . . . . . . . 2<br />

1.2 Following objectives for <strong>the</strong> diploma <strong>the</strong>sis . . . . . . . . . . . . . . . . . . . . . . 3<br />

2 Theory 5<br />

2.1 Description <strong>of</strong> <strong>the</strong> utilised <strong>seakeeping</strong> simulation method . . . . . . . . . . . . . 5<br />

2.1.1 Linear strip method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5<br />

2.1.1.1 Calculation model . . . . . . . . . . . . . . . . . . . . . . . . . . 5<br />

2.1.1.2 Roll radius <strong>of</strong> inertia <strong>and</strong> roll period . . . . . . . . . . . . . . . . 6<br />

2.1.1.3 Roll damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6<br />

2.1.1.4 Calculation settings . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />

2.1.1.5 Typical RAOs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8<br />

2.1.2 Nonlinear <strong>seakeeping</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8<br />

2.1.2.1 Roll motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9<br />

2.1.2.2 Surge Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9<br />

2.1.3 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />

2.2 Environmental conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />

2.2.1 Sea condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />

2.2.2 Wind condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11<br />

3 Data input 13<br />

3.1 Main Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13<br />

3.2 Lines <strong>of</strong> <strong>the</strong> ship . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13<br />

3.3 Lateral areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13<br />

3.4 Lightship distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14<br />

3.5 Loading condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14<br />

3.6 Free surface correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15<br />

3.7 Intact <strong>stability</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15<br />

3.8 Cross-curves <strong>of</strong> <strong>stability</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15<br />

3.9 Bilge keel dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16<br />

3.10 Bridge height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17<br />

3.11 Size range <strong>of</strong> <strong>the</strong> examined vessels . . . . . . . . . . . . . . . . . . . . . . . . . . 18<br />

3.12 Sea conditions to be examined . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18<br />

4 <strong>Examination</strong> 19<br />

4.1 Vessel No. 01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />

I

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