叶片高度的增长，使沿叶高的等功设计已经不能充分发挥长叶片高圆周速度部分的做功能力。

The increment of blade length makes the equal work distribution along the blade length be unable to dig the potential power of long blade at the part with high circumferential velocity.

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结果表明叶片高应力区域位于榫齿及其圆弧过渡处，并且发现在这些位置存在严重的应力集中情况。

The results show that high stress in serration and its arc transition region, and observed that severe stress concentration in these locations.

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只有当你靠近风车时才能发觉这些庞然大物竟有40层楼那么高，他们的叶片有大型喷气式客机的机翼那么长。

Only as you draw near to one do you realise that these towers are the height of 40-storey buildings; their blades are the length of a jumbo jet’s wing.

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