Analysis Of Dynamic Characteristics Of Vertical-axis Wind Turbine Tower Structure

The rapid economic growth and nervous envenriment pollution havecontributed to tody’s quickly development of wind turbines. They are two types ofwind turbines, They are horizontal-axis wind turbine and vertical-axis wind turbine.Now the horizontal-axis wind turbines are popular and have been accepted widely.The advantages of vertical-axis wind turbine are realized with the studies of it. Themarket prospect of vertical-axis wind turbines is well. The blades of wind turbinesare easy to be bkoken and fall from the wind turbines as the result of appearing oflarger wind turbines, mechanical characteristics and characteristics of wind field inChina. Because of the period force made by wind wheel, the wind turbine towerstructures are different from other types of towers and the falling of wind turbinesblades should influent the wind turbine tower.This paper mainly includes the static analysis,dynamic analysis and stabilityanalysis of a Darieu H wind turbine whether the wind wheel works well or one ofthe blades falls of the wind wheel, considering the mean wind on the wind turbinesand the period force made by wind wheel.In the static analysis of wind turbine tower, mainly analysis the influence madeby the falling of blades when the wind blow in different direction and the influenceto different position in the tower, considering the period force made by wind wheel;dynamic analysis of wind turbine tower includes modal analysis of wind turbinewheel in differernt conditions, drawing the CAMPBELL chart of wind turbine wheeland testing the probability of resonating between wind turbine tower and windturbine wheel. There are buckling analysis of wind turbine tower, calculating thebuckling eigenvalue of wind turbine tower and analysing the influence made by thefalling of blades in the stability analysis of wind turbine tower. The main conclusionobserved from analysis in this paper is shown below: when analysize wind turbinestower structure the periodic load made by wind turbine shoud be concluded,thefalling of blades brings big influence to upper elements of vertical-axis wind turbinetower and the moment in straight plate. So in the design of the vertical-axis windturbine tower, the influence by the blades must be considered and stronghten theintensity of straight plateand stability of upper structure of the tower structure.