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首页> 外文会议>European Wind Energy Conference Exhibition >Comparative investigation of belt/spar web designs in glass/epoxy and carbon/epoxy shown on a rotor blade of the multi-megawatt class of wind turbines
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Comparative investigation of belt/spar web designs in glass/epoxy and carbon/epoxy shown on a rotor blade of the multi-megawatt class of wind turbines

机译：玻璃/环氧树脂和碳/环氧树脂在多兆瓦类风力涡轮机的转子叶片中玻璃/环氧树脂和碳/环氧树脂的比较研究

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The constantly increasing demand for higher energy yield leads to larger rotor blades. That means higher stresses for the structure and materials used in these bigger blades. There are indications to use carbon fibres for the belt structure in rotor blades over 40 m length. For a 44 m long rotor blade comparisons are made between the often used single belt/spar web design and the double belt/spar web design with glass/epoxy and carbon/epoxy as belt materials. With the structural analysis software Farob of Focus4 a rotor blade is modelled and analysed with different belt/spar web designs. Design parameters are kept fixed for the shell structure, a selection of extreme load cases is made, the twist of the double spar web structures and the position on the belts are set and all belt design variations are applied to both sides of the rotor blade (pressure and suction side). All blades are designed for a maximum static blade tip deflection of 5.8 m and the eigenfrequencies for a rotational speed of 16 rpm should be more than 1 Hz. To compare the simulated rotor blade a method is presented to find optimal design parameters. Parameter variations are made and "stress" and "buckling" are calculated in the relevant sections. The tendencies of the variation are described with specific values which are evaluated to give parameters for an optimised belt structure. To take in to account the given design parameters the analysed rotor blade can be build with both materials in single and double belt/spar web design. The material cost indicates to build in glass/epoxy but for larger blades it is difficult to reach the set eigenfrequency data. The higher cost of a carbon design could be compensated through structural advantages depending on the practical operation of the blades.
机译：对更高能源产量的不断增加的需求导致更大的转子叶片。这意味着这些更大叶片中使用的结构和材料的应力更高。存在在长度超过40μm的转子叶片中使用碳纤维的带结构。对于44米长的转子叶片比较，在经常使用的单带/脚网设计和双带/脚网设计之间进行比较，用玻璃/环氧树脂和碳/环氧树脂作为带材料。使用结构分析软件4，FALES4具有转子叶片的模型和分析，并用不同的皮带/脚网设计进行分析。为壳结构保持固定的设计参数，制造了一系列极端负载箱，将双翼架卷筒纸结构的扭曲设定，并且将所有带设计变化施加到转子叶片的两侧（压力和吸力侧）。所有刀片都设计用于5.8米的最大静态刀片尖端偏转，转速为16 rpm的特征频率应超过1 Hz。为了比较模拟转子刀片，提出了一种方法以找到最佳设计参数。参数变型并在相关部分中计算“应力”和“屈曲”。描述了变化的趋势，具体值被评估，以提供优化的带结构的参数。要考虑到给定的设计参数，分析的转子叶片可以用单皮带/脚蹼/脚网设计中的两种材料构建。材料成本表明，在玻璃/环氧树脂中构建，但对于较大的刀片，难以到达设定的特征频率数据。根据叶片的实际操作，可以通过结构优势来补偿碳设计的更高成本。

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