葉片疲勞試驗

wumingsheng

Abstract
The size of wind turbine rotors has increased in the past decade from 40 m to more than 120 m diameter. The resulting mass of about
18 tons per rotor blade causes high bending moments at the inner part of a blade due to the gravitational loads. More than 108 load
cycles will happen in the prospected lifetime of 20 years of a turbine. During this time the rotor blades are exposed to various hostile
conditions such as extreme temperatures, humidity, rain, hail impact, snow, ice, solar radiation, lightning and salinity. In order to withstand
these external conditions without diminishing the safety a sound knowledge of the fatigue behaviour of the material and structural
properties is needed. To meet the upcoming requirements the paper will highlight some fatigue and lifetime aspects on wind turbine rotor
blades made of composite materials. This includes an historical part in connection with glider technology, the presentation of relevant S–
N curves not only for the 0-orientated fibres representing the spar cap but also for ±45-lay-ups in shear web and shell, the influence of
fibre content and architecture, of environmental effects, a view on lifetime prediction on structural elements as well as on present and
future work.

毫微

學習，謝謝。
"more than 108"應為"more than 100,000,000"

dubailiu

非常感謝！

wumingsheng

都老板，

葉片造的順利否？