Final report for WP4.3: Enhancement of design methods ... - Upwind

More documents

Recommendations

Info

UPWIND WP4: Offshore Support Structures and Foundations Guideline GL 2005 - Offshore Wind GL 2007 - Part 6 Offshore Technology – Chapter 2 Mobile Off- shore Units GL 2007 - Part 6 Offshore Technology – Chapter 2 Mobile Offshore Units Position Mooring IEC 61400-3 - Guideline for Offshore Wind Turbines, Edition 1 ISO 19904 - Petroleum and natural gas industries - Floating offshore structures - Part 1: Monohulls, semi submersibles and spars DNV-OS-C101 - Design of Offshore Steel Structures, General (LRFD method) DNV-OS-E301 - Position Mooring ISO 19901-7 – Petroleum and natural gas industries Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. 1 VIM = vortex induced motions Table 9.3: Guidelines: Safety Factors vs. Limit States Limit State ULS FLS SLS ALS 1.1 to 1.35 1,1 to 1,67 1.8 to 2.7 1,1 to 1,35 1.0 to 1.3 1.1 to 2.5 1.2 to 2.0 138 Return period 1,00 1,00 n/a 50 years 1,0 to 1,35 1,00 n/a n/a 1,05 to 1.15 1.25 to 1.8 100 years 100 years 1,0 n/a n/a 50 years Refers to DNV-OS-C101 1,00 1,00 1,00 100 years n/a n/a 1.0 to 1.35 3.0 n/a 1.0 100 years Remarks Load safety factors Metallic materials - ULS: γM = 1,1; FLS: 1,0 to 1,25, depending on position and importance FRP materials – ULS: 2,3 to 2,65 FLS: 1,485 to 2,35, depending on manufacture and type Global safety factors for working stress design Load safety factors for LRFD VIM* 1 may be neglected
UPWIND WP4: Offshore Support Structures and Foundations Table 9.4: Load Groups for Design Load Group Design Condition Environmental Recurrence Limit State Conditions Period I Normal operation, parked Extreme ≤ 50 years ULS, SLS II Operation, emergence stop, fault occurrence, parked after fault Normal ≤ 1 year ULS, FLS, SLS III Installation, To be defined by the - ULS maintenance and recovery designer IV Secured/Parked during installation Normal ≤ 1 year ULS, FLS 139
Page 1 and 2:
Project UpWind Contract No.: 019945
Page 3 and 4:
Acknowledgement The presented work
Page 5 and 6:
Summary The overall aim of the UpWi
Page 7:
Table of Contents Acknowledgement..
Page 10 and 11:
Task 4.1 Integration of support str
Page 12 and 13:
Sequential coupling The sequential
Page 14 and 15:
analysis. In the new multibody code
Page 16 and 17:
Figure 2.4: 2nd global bending mode
Page 18 and 19:
3.2 Comparison of deterministic loa
Page 20 and 21:
Figure 3.5: Time series of axial fo
Page 22 and 23:
• Time domain simulation in ADCoS
Page 24 and 25:
• A supplementary load vector for
Page 26 and 27:
The following results are found: Fi
Page 28 and 29:
Figure 4.5: Output positions in the
Page 30 and 31:
It is directly visible that there i
Page 32 and 33:
ated eigenfrequency is shifted into
Page 34 and 35:
Water levels For the calculation of
Page 36 and 37:
guidelines for the inclusion of cli
Page 38 and 39:
damaging if the frequency of the ex
Page 40 and 41:
uncertain parameters carefully. Thr
Page 42 and 43:
Table 5.3 shows annual reliability
Page 44 and 45:
Steel substructure for offshore win
Page 46 and 47:
Table 5.16 shows the required FDF v
Page 48 and 49:
A Fracture Mechanical (FM) modellin
Page 50 and 51:
Figure 5.4: Annual reliability indi
Page 52 and 53:
Further, the effect of possible ins
Page 54 and 55:
Rainflow evaluation The load cases
Page 56 and 57:
For DLC 7.2 it has to be considered
Page 58 and 59:
Guideline, DLC 1.5). Furthermore, t
Page 60 and 61:
Table 5.28: Output locations for da
Page 62 and 63:
From these results it can be clearl
Page 64 and 65:
Figure 5.11: Normalised DELs with v
Page 66 and 67:
Figure 5.14 presents normalized DEL
Page 68 and 69:
Figure 5.16: Output locations for e
Page 70 and 71:
UPWIND WP4: Offshore Support Struct
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89: UPWIND WP4: Offshore Support Struct
show all

Final report for WP4.3: Enhancement of design methods ... - Upwind

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?