Details
| Translated title of the contribution | Sandwichtowers for wind turbines with high strength steel and core materials |
|---|---|
| Original language | German |
| Pages (from-to) | 648-659 |
| Number of pages | 12 |
| Journal | STAHLBAU |
| Volume | 79 |
| Issue number | 9 |
| Publication status | Published - 6 Sept 2010 |
Abstract
The performance and the dimensions of wind energy converters have been increased significantly within the last few years. Thus, the requirements on tower constructions will also increase following the development of bigger turbines. Usually tubular steel and pre-stressed concrete towersare chosen as support structures for wind turbines. The structural designof tubular steel towers is mainly driven by ultimate and fatigue limit state. Especially shell buckling leads to large dimensions and thicknesses for the steel sections. Therefore, a new kind of tower, the so called sandwichtower, has been developed as an alternative solution with the aim ofincreasing the shell stability. The sandwich tower consists of an inner and outer steel shell which are bonded together with a core material between them. That works as a full space stiffener. As a result of the investigations a combination of steel and sandwich-section is favoured where thesandwich is only planned for the lower tower section to get higher stability simultaneously with thinner shells. Therefore, the effective welding time can be decreased when the shells are made of high strength steels. Especially for tower sections with D > 4.3 m a new fabrication concept withlongitudinal partial shells is developed to offer the transportation onshore and to minimize the number of critical circumferential welds. FüRthermore, a new kind of connection between the tower sections is presented without bolted ring flanges.
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Materials Science(all)
- Metals and Alloys
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In: STAHLBAU, Vol. 79, No. 9, 06.09.2010, p. 648-659.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Sandwichtürme für Windenergieanlagen mit höherfesten Stahl- und Verbundwerkstoffen
AU - Keindorf, Christian
AU - Schaumann, Peter
PY - 2010/9/6
Y1 - 2010/9/6
N2 - The performance and the dimensions of wind energy converters have been increased significantly within the last few years. Thus, the requirements on tower constructions will also increase following the development of bigger turbines. Usually tubular steel and pre-stressed concrete towersare chosen as support structures for wind turbines. The structural designof tubular steel towers is mainly driven by ultimate and fatigue limit state. Especially shell buckling leads to large dimensions and thicknesses for the steel sections. Therefore, a new kind of tower, the so called sandwichtower, has been developed as an alternative solution with the aim ofincreasing the shell stability. The sandwich tower consists of an inner and outer steel shell which are bonded together with a core material between them. That works as a full space stiffener. As a result of the investigations a combination of steel and sandwich-section is favoured where thesandwich is only planned for the lower tower section to get higher stability simultaneously with thinner shells. Therefore, the effective welding time can be decreased when the shells are made of high strength steels. Especially for tower sections with D > 4.3 m a new fabrication concept withlongitudinal partial shells is developed to offer the transportation onshore and to minimize the number of critical circumferential welds. FüRthermore, a new kind of connection between the tower sections is presented without bolted ring flanges.
AB - The performance and the dimensions of wind energy converters have been increased significantly within the last few years. Thus, the requirements on tower constructions will also increase following the development of bigger turbines. Usually tubular steel and pre-stressed concrete towersare chosen as support structures for wind turbines. The structural designof tubular steel towers is mainly driven by ultimate and fatigue limit state. Especially shell buckling leads to large dimensions and thicknesses for the steel sections. Therefore, a new kind of tower, the so called sandwichtower, has been developed as an alternative solution with the aim ofincreasing the shell stability. The sandwich tower consists of an inner and outer steel shell which are bonded together with a core material between them. That works as a full space stiffener. As a result of the investigations a combination of steel and sandwich-section is favoured where thesandwich is only planned for the lower tower section to get higher stability simultaneously with thinner shells. Therefore, the effective welding time can be decreased when the shells are made of high strength steels. Especially for tower sections with D > 4.3 m a new fabrication concept withlongitudinal partial shells is developed to offer the transportation onshore and to minimize the number of critical circumferential welds. FüRthermore, a new kind of connection between the tower sections is presented without bolted ring flanges.
UR - http://www.scopus.com/inward/record.url?scp=77957867610&partnerID=8YFLogxK
U2 - 10.1002/stab.201001359
DO - 10.1002/stab.201001359
M3 - Artikel
AN - SCOPUS:77957867610
VL - 79
SP - 648
EP - 659
JO - STAHLBAU
JF - STAHLBAU
SN - 0038-9145
IS - 9
ER -