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To complement the theoretical principle studied in theclassroom and be able to apply the understandinggained in the design and analysis of subsea risers usingindustry-based software like FLEXCOM.
API 17J: Specification for Unbonded Flexible Pipe
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Get an approximate riser configuration
Using the values gotten from the approximate riserconfiguration, the static model is setup, analyzed andoptimized.
Offsets and environmental conditions such as currentare applied to the static model so as to run the dynamicanalysis.
The materials inherent damaging pull, burst pressure,
contact pressure and bending strain is verified againstthe operational conditions.
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Point No.
Section 1 Section 2 Section 3 Hang off Angle
Start End Start End Start End Vessel Contact
X (m)
0.00
91.899
91.899
125.949
125.949
200
9.64o
Y (m) 0.00 61.194 61.194 77.55 77.55 140.00
Length (m)
130
60
150
5.12
5.12
5.12
5.12
5.12
5.12
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Parameters Obtained Unit
Riser
10
Static Envelope of Curvature
Sagbend
(/m)
0.163
Hogbend 0.063
Hang off angle at vessel contact (Degrees) 9.66
Sagbend Elevation (m) 49.36
Hogbend Elevation (m) 91.72
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Parameters
Risers
10"
Far Near
Hogbend (/m) 0.163 0.169
Sagbend (/m) 0.0625 0.065
Hang-off Angle At Vessel Contact (Degrees)
6.95
6.95
Hogbend Elevation (m)
119.5
111.6
Sagbend Elevation (m)
46.2
42.1
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Parameters
10 Riser
Inherent Operation
Damaging Pull (KN) 2959.27 2803.87
Burst Pressure (MPa)
42.796
40
Contact Pressure (MPa) 9.756
4
Minimum Bend Radius of Internal Sheath (m)
1.82
2.22
Minimum Bend Radius of External Sheath (m) 2.21 2.22
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10
Static Offset Offset + Current
Near offset analysis
Effective Tension (kN)
59.66
62.63
62.07
Maximum Curvature
(/m)
0.168
0.16
0.113
Far offset analysis
Effective Tension (kN)
58.04
55.65
56.36
Maximum Curvature
(/m)
0.163
0.238
0.23
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Licensed To:
University of Aberdeen.
Flexcom
Version 7.7
Project Title
10-Inch Far DynamicFigure Title
Snapshot Of Effective TensionFigure N
1
Date
09/05/2013
Document N Revision
0 50 100 150 200 250 300 350
Curved Distance along Structure
0
10000
20000
30000
4000
0
50000
60000
Effective
Tensiona
t3.200
secs
Element set 1; Effective tension
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