Patent ID: 9394879
Filing Date: 2016-07-19
CPC Classification: F03D,F05B,Y02E

Claim Text:
1. A method of manufacturing a wind turbine steel tower, comprising: arranging a plurality of structure elements formed of steel above each other, wherein at least two structure elements comprise steel of a different quality, said quality of the steel being proportional to a maximum admissible yield stress below which the stress is configured to maintain its form; selecting a first steel to form a first structure element with a first quality proportional to a first maximum admissible yield stress; and selecting a second steel to form a second structure element with a second quality proportional to a second maximum admissible yield stress; wherein the first structure element is positioned above the second structure element on the steel tower and wherein the first maximum admissible yield stress is greater than the second maximum admissible yield stress.