P1253814611ZkcIG

1
COMPUTATIONAL OFFSHORE ENGINEERING IN GTSTRUDL
2
SUMMARY OF PRESENTATION THE STRUCTURAL
TYPES THE ANALYSIS AND DESIGN PROCEDURES THE
AVAILABLE SOFTWARE ILLUSTRATIVE APPLICATIONS
3
TYPES OF OFFSHORE STRUCTURES
4
STEEL JACKET STRUCTURES
5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
JACKUPS
10
(No Transcript)
11
SEMI-SUBMERSIBLE STRUCTURES
12
(No Transcript)
13
(No Transcript)
14
TENSION LEG STRUCTURES
15
FPSO
16
(No Transcript)
17
(No Transcript)
18
WIND ENERGY CONVERTERS
19
OFFSHORE ENGINEERING FOR JACKET STRUCTURES
20
CONSTRUCTION
21
(No Transcript)
22
LOAD-OUT
23
TRANSPORTATION
24
(No Transcript)
25
LAUNCHING
26
UPENDING
27
(No Transcript)
28
PILE DRIVING
29
(No Transcript)
30
(No Transcript)
31
INSTALLATION
32
IN SITU ANALYSIS AND DESIGN
33
(No Transcript)
34
THE AVAILABLE SOFTWARE
35
GTSTRUDL

GTSELOS
36
HYDRODYNAMIC OFFSHORE ENGINEERING (GTSELOS)
GENERATION OF ENVIRONMENTAL LOADS
FLOATING SIMULATION
MOTION OF FLOATING BODIES
LAUNCHING SIMULATION
UPENDING SIMULATION
DYNAMIC CALCULATIONS
37
OFFSHORE ENGINEERING GTSTRUDL
SOIL-STRUCTURE INTERACTION
FATIGUE ANALYSIS
OFSHORE DESIGN
38
GTSTRUDL
GTSELOS
39

• WORKFLOW
• Model prepared for GTSELOS, as an input
  command file
• Command file is processed by GTSELOS
  generating interface files
• Command file is processed by GTSTRUDL, reading
  interface files, and continue with processing

40
GTSELOS IS A DOS PROGRAM HAVING A COMPATIBLE
COMMAND STRUCTURE
41
.. LEGS MEMBER INCIDENCES
AND PROPERTIES PIPE OD 650. THICKNESS 11.
- WATER MASS NONFLOODED BUOYANT CDWATER .85
CMWATER 1.12 WT/V 0.0001 1 1 2
2 2 3 3 3 4 4
4 5 5 5 6 END
MEMBER INCIDENCES CONDUCTORS MEMBER
INCIDENCES AND PROPERTIES PIPE OD 650. THICKNESS
25.4 - WATER MASS NONFLOODED BUOYANT CDWATER
.85 CMWATER 1.12 WT/V 0.0001 101 101
102 102 102 103 103 103
104 104 104 105 105 105
106
42
.. UNITS METERS INITIAL
CONDITIONS JNT2 1.0 0.0 0.0 JNT3
0.0 -1. 0 .0 - LINEAR DISPLACEMENT
ORIGIN X 0.0 Y 0.0 Z 0.0 WAVE STOKES
FIFTH EXECUTE STEP WAVE LOADINGS TYPE
STRUCTURE FIXED WAVE WIND LIST '6100'
HEIGHT 6.1 PERIOD 6.5 DEPTH 16.06
DIRECTION 0.0 FROM -3.25 TO 3.25 INCR 0.65 END
WAVE WIND LIST FINISH AFTER
GTSELOS, IN GTSTRUDL - UPPER PILES MEMBER
INCIDENCES AND PROPERTIES PIPE OD 550. THICK
20.0 301 301 302 302 302
303 303 303 304 305 307
308 JOINT TIES 2 3 4 EQUAL 302 303 304 8 9
10 EQUAL 308 309 310 14 15 16 EQUAL 314 TO
316 .
43
GTSELOS BEING A DOS PROGRAM THE USER CANNOT TAKE
ADVANTAGE OF THE GTSTRUDL ADVANCED MODELING
FACILITIES
44
(No Transcript)
45
GTSTRUDL
GTSELOS
WINSELOS
46

• ALTERNATIVE WORKFLOW
• Model prepared using GTSTRUDL facilities
  (including menus and graphics)
• WINSELOS is used to specify hydrodynamic data and
  run GTSELOS.
• Interfaces data sent to GTSTRUDL for analysis and
  design.

47
Pile-Structure Interaction Analysis Analysis of
three-dimensional offshore structures, supported
by non-linear pile members embedded in a
non-linear soil medium, under environmental and
operational actions.
48
(No Transcript)
49
(No Transcript)
50
Code Checking and Design The members of the
offshore structure can be automatically selected
from steel profile tables, or can be checked,
using different design codes which include, among
others, the API 20th Edition code, the AISC
Allowable Stress Design and Load and Resistance
Factor design codes.
51
OFSHORE DESIGN
52
(No Transcript)
53
THE RING-SCF PROGRAM
54
(No Transcript)
55
FATIGUE ANALYSIS
DETERMINISTIC ANALYSIS SPECTRAL ANALYSIS
56
DETERMINISTIC FATIGUE

• Determination of Wave blocks
• Quasi-Static or Dynamic Analysis
• Evaluation of SCFs
• Hot-Spot Stresses
• Damage calculation ( D? ni/Ni)
• Fatigue Life calculation (L1/D)

57
RANDOM FATIGUE
SR(?) H(?,?) 2 . S? (?,?) SR(?)
Response Spectrum H(?,?) Transfer Function S?
(?,?) Wave Spectrum
58
(No Transcript)
59
THE SCATTER PROGRAM
60
WIND ENERGY CONVERTERS
61
MONOPILES
62
DENMARK 1981 Jobs for a few hundred
people TODAY Industry provides jobs for more
than 20,000 people
63
DENMARK TODAY Wind provides about 15 of
Required energy 2010 Wind will provides about
25 of Required energy 2030 Wind provides about
50 of Required energy
64
(No Transcript)
65
(No Transcript)
66
TURBINE
WAVES
67
THE FORFUN PROGRAM
68
FROM GTSELOS TO GTSTRUDL
GTSTRUDL TRANSIENT ANALYSIS
69
Some Practical Applications
70
(No Transcript)
71
BRAZIL
72
NORTH SEA
73
(No Transcript)
74
Installation
UK
75
UK
76
EGYPT
77
SUBSEA UNIT
78
(No Transcript)
79
(No Transcript)
80
(No Transcript)
81
(No Transcript)
82
(No Transcript)
83
(No Transcript)
84
Padeyes
85
Padeye Type A
Padeye Type B
86
Padeye Type B
Padeye Type A
87
Deflections in X dir.
units mm
88
Deflections in X dir.
units mm
89
(No Transcript)
90
(No Transcript)
91
(No Transcript)
92
(No Transcript)
93
(No Transcript)
94
(No Transcript)
95
(No Transcript)
96
THE STRUCTURAL MODEL
97
THE STRUCTURAL MODEL
98
WIND REPRESENTATION 1.- Subdivide structural
model by bays, for consideration of the gusts
interaction. 2.- Generate wind loads by bay and
direction. 48 different loading conditions
were generated. 3.- Transform the static wind
loadings in sinusoidal loadings, for
frequency response analysis.
99
WIND REPRESENTATION - BAYS
BAY 1
BAY 2
BAY 3
BAY 4
BAY 5
BAY 6