Analysis Of Dynamic Characteristics Of Wind Turbine Tower Structure

Wind power is a kind of clean energy, which is supported by the government. And wind-power structures and infrastructions are very important. Vertical Axis Wind turbine stuructures are different from Horizontal Axis Wind turbine structures because of special advantages and prospection, while many scholars and institutions spend less attention on this field. It is very urgent for many companies to solve problems such as structural strength problem and dynamic problems. When the mentioned problems are solved, it will be good for the Horizontal Axis Wind turbine industry. The program mainly made use of FEM to model Horizontal Axis Wind turbine structures reasonably, analyzing the mechanical characters and destruction forms under different conditions. The further research is brought out through comparisons among the results under different conditions.The paper's main point lies on the rotation of the wind wheel structures, analyzing the affection of the structural rotation on the wind loads and the effect of the changing wind loads on the whole structures under the steady winds. Besids, the mechenical characters of the wind wheel structures are analyzed under the combination of the gravity and the centerfugal force. Finally, the destruction forms under extrme conditions are also researched. Through the whole research, there are some meanningful conclusions: 1) the rotation of the wind wheel structures have a significant influence on the wind loads, because of which the steady wind loads will be changed to periodical loads, and affecting the dynamic response of the structures; 2) the mechenical characters and the modes of the wind wheel structures are deeply affected by the rotaiton of itself; 3) under the extreme conditions such as one of the blades is lost, excentricity will cause the destruction of the whole wind wheel structures.