| 摘要 |
<p>A composite blade structore for a blade for a wind turbine and a metliod of m.anufac ture thereof is described. The blade core is formed of a first, light-weight, core mate rial and a sec ond core material of a higher grade and/or structural strength. The second material is provided as a relatively thin layer on the outside of the first core material, so that the tip ends of any resin bridges in the core may be contained within the second eore niaterial. As the second core material is of a higher grade than the first, this in creases the resistance of the blade eore to cracks or other faihires originating at the tip of the resin bridge. As only a relatively small amount of second core material is used compared to the first core material, this results in reduced cost and minirnised weight of the total Made.</p> |
