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Home My WebLink AboutFoundation loads 54_ 52 900 75m Foundation loads DIRECTWIND 54*900 75 m Page 1 of 3 Document label : 1003240 Dated : 7-4-2005 Authorisation Name Date Signature Prepared A. Waaijenberg 7-4-2005 Checked A. van de Pol Approved Revision Date Pages Change description a 7-4-2005 All original b c Document Distribution List Applicable Documents and References : : : : : : : : : : : : : : : LAGERWEY the Windmaster P.O. Box 279, 3770 AG Barneveld, The Netherlands Hanzeweg 31, 3771 NG Barneveld, The Netherlands Phone: +31 (0)342-422724 - Fax: +31 (0)342- 422861 © Copyright Lagerwey Windturbine BV. This document and contents thereof are confidential. Unauthorised reproduction or disclosure of this document or any of its parts other than for which it was produced is not permitted. All information in this document could be changed without notice. This document does not form a part of any quotation or selling contract. Foundation loads DIRECTWIND 54*900 75 m 1003240  EWT BV 7-4-2005 Page 2/3 Contents Page 1. Introduction ....................................................................................................3 2. Extreme foundation loads..................................................................................3 3. Fatigue foundation loads ...................................................................................3 4. References ......................................................................................................3 Table list Table 1 DIRECTWIND 54*900 extreme 75m foundation loads according to IEC-2..........3 Foundation loads DIRECTWIND 54*900 75 m 1003240  EWT BV 7-4-2005 Page 3/3 1. Introduction This document gives the foundation loads for the DIRECTWIND 54*900 wind turbine with 75 m hub height, for an IEC-3 wind climate regarding operational loads and IEC-2 wind climate regarding extreme loads according to [3] and [4]. 2. Extreme foundation loads The loads were extracted from [2]. [1] reports the calculations and gives the starting points (turbine description and modelling in Phatas IV, the structural loads program). In Table 1 the extreme loads are summarised as calculated above (no material and/or load factor) and with a factor 1.35 (load factor 1.35 according to IEC 61400-1 and NVN 11400-0). The weight has been multiplied with a load factor 0.9 (favourable load). Extreme foundation loads Vertical force [kN] Horizontal force [kN] Tilt moment [kNm] Torsion moment [kNm] Incl. load factor acc. to [3] -1070 501 32672 1400 Excl. load factor -1190 371 24202 1037 Table 1 DIRECTWIND 54*900 extreme 75m foundation loads according to IEC-2. Remark: The foundation stiffness against rotation around a horizontal axis must be larger than 1,2*1010 Nm/rad. 3. Fatigue foundation loads The fatigue loads for the tower base are presented by the Markov matrix of twbaseMx_rmm.txt and twbaseMy.rmm_txt at ref [2]. The loads are binned mean moments combined with the number of occurences for different cycle ranges. The load factor for fatigue loads according to [3] is equal to 1. The weight load of the turbine can be extracted from Table 1. 4. References [1] ECN-CX—04-039, Load set DIRECTWIND 54*900 IEC IIIA + IEC IIIBpark, 75 m hub height, C. Lindenburg, August 2004. [2] CD-ROM, DIRECTWIND 54*900 IEC IIIA +IEC IIIBpark, 75 m hub height, C. Lindenburg, 5th August 2004. [3] NVN 11400-0 Wind turbines-Part 0: Criteriia for type-certification-technical criteria, thirst edition, April 1999. [4] IEC 61400-1, Wind turbine generator systems – Part 1: Safety requirements, second edition 1999-02.