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To analyze wind-induced response characteristics of a wind turbine tower more accurately, the blade-tower coupling effect was investigated. The mean wind velocity of the rotating blades and tower was simulated according to wind shear effects, and the fluctuating wind velocity time series of the wind turbine were simulated by a harmony superposition method. A dynamic finite element method (FEM) was used to calculate the wind-induced response of the blades and tower. Wind-induced responses of the tower were calculated in two cases (one included the blade-tower coupling effect, and the other only added the mass of blades and the hub at the top of the tower), and then the maximal displacements at the top of the tower of the tow cases were compared with each other. As a result of the influence of the blade-tower coupling effect and the total base shear of the blades, the maximal displacement of the first case increased nearly by 300% compared to the second case. To obtain more precise analysis, the blade-tower coupling effect and the total base shear of the blades should be considered simultaneously in the design of wind turbine towers. 相似文献
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在这个炎热的6月,IBM和Sun两家公司在刀片服务器领域的动作让这个市场热得有点过火,而且这些动作都与AMD公司的Opteron(皓龙)芯片有关。 相似文献
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袁晓洲 《宁波职业技术学院学报》2002,2(3):105-106
本文分析了电厂排渣阀损坏的主要原因,提出了应用新型高铬铸铁提高阀门使用寿命的方法、新型阀门的热处理工艺和切削加工方法,说明了合理设计零件结构的重要性。 相似文献
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数控车刀片存在刀尖圆弧的理由?刀尖圆弧大小的工艺选择?带刀尖圆弧数控可转位车刀在编程操作中的应用?这些是应用可转位车刀进行数控车削须解决的问题,文章探讨了如何清晰和通俗易懂地解析这些问题。 相似文献