It can be seen from the results that vibration mode from the first to the seventh order was mainly composed by waving and bending vibration. The anisotropic mechanical properties of the FRP laminates and the dynamic stiffening effect of the blade were comprehensively considered, and the vibration modal simulation of the blade was calculated and analyzed.
#Microwind software software
Modal analysis of the wind turbine blade was carried out by using the FEM software COSMOSWorks. In this paper, a three-blade micro-wind turbine with 500 W rated power was studied. So far, there is still a lack of simulation and detailed comparison about the modal of micro wind turbine blades using COSMOSWorks. They have low requirements for wind energy resources and owning the advantages of compact structure and convenient installation. Micro wind turbines are usually referring to the ones that the rated power is less than 1 kW and the rated voltage range is between 12 V and 48 V. The blade undergoes tensile stress due to centrifugal force when spinning around its axis at high speed, which leads to dynamic stiffening phenomenon. The blade structure is flexible due to its mechanical properties therefore, vibration is inevitable when loaded by the randomly alternating wind. In recent years, the numerical method of modal analysis is widely used in wind turbine blade structural dynamics. Structural dynamics analysis of wind turbine blades is more complicated than other common construction machineries. Structural dynamics analysis of the construction machinery is mainly focused on the natural frequency and vibration mode characteristics. Analysis of the dynamic characteristics of the wind turbine structure is an important aspect in the structural analysis of the wind turbine. The structure and strength of the blade plays an important role in the reliability of the wind turbine. As one of the key components, the blade generally determines the performance and life of the wind turbine. The wind turbine generates energy from the wind through its rotating blades. As an inexhaustible and renewable energy source, wind energy has been rapidly exploited in recent years.
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