Download ShipMo3D Version 3.0 User Manual for Computing Ship Motions in

5.1.3
Ochi and Hubble Six Parameter Spectrum . . . . . . . . . .
13
5.1.4
Bretschneider and JONSWAP Spectrum with
Cosine-Squared Spreading Function . . . . . . . . . . . . . .
13
Ten Parameter Directional Spectrum . . . . . . . . . . . . .
13
6 Motions of Freely Maneuvering Ship in a Seaway – SM3DFreeMo . . . . .
15
7 Ship Seakeeping in a Regular Seaway – SM3DSeakeepRegular . . . . . . .
16
8 Ship Seakeeping in a Random Seaway with Principal Direction Given
Relative to the Ship – SM3DSeakeepRandom . . . . . . . . . . . . . . . .
17
9 Ship Seakeeping in a Fixed Seaway with Ship Heading Given Relative to
Earth-Fixed Axes – SM3DSeakeepSeaway . . . . . . . . . . . . . . . . . .
18
10 Ship Seakeeping in a Fixed Seaway Using Previously Computed Ship
Motion RAOs – SM3DSeakeepSeawayFromRaos . . . . . . . . . . . . . . .
19
11 Time Series of Ship Motions from Response Amplitude Operators –
SM3DTimeSeriesFromRaos . . . . . . . . . . . . . . . . . . . . . . . . . .
20
12 Inputs for Rudder and Azimuthing Propeller Autopilots
. . . . . . . . . .
21
13 Inputs for Frequency Domain Ship Motion Predictions in Random Seas . .
22
13.1 Wave Spectra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
13.2 Motion-Induced Interruptions . . . . . . . . . . . . . . . . . . . . . .
22
13.3 Slamming Pressures and Forces . . . . . . . . . . . . . . . . . . . . .
22
14 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29
Symbols and Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
Annex A: Files for Building a Seaway with SM3DBuildSeaway3 . . . . . . . .
35
5.1.5
vi
A.1
Format of Input Seaway File for SM3DBuildSeaway3 . . . . .
35
A.2
Format of Input Directional Spectrum File for
SM3DBuildSeaway3 . . . . . . . . . . . . . . . . . . . . . . .
63
DRDC Atlantic TM 2011-308