CAJ | 학술논문

为获得水平轴风力机塔架在时变载荷作用下的动态响应,将塔架简化成悬臂梁,利用二结点梁单元进行离散化建模,分析了塔架弯曲振动固有动力特性.在建立塔架结构动力学运动方程、计算塔架所受时变载荷的基础上,运用线性加速度法和模态叠加原理对风力机塔架的动态响应进行计算,编制了相应的计算机程序.以某1.0MW风力机塔架为例,获得了风力机在湍流风运行条件下塔架在仿真时间内的位移、速度和加速度,并与"GHBladed"软件的计算结果进行了比较,表明计算模型是可行的.
위획득수평축풍력궤탑가재시변재하작용하적동태향응,장탑가간화성현비량,이용이결점량단원진행리산화건모,분석료탑가만곡진동고유동력특성.재건립탑가결구동역학운동방정、계산탑가소수시변재하적기출상,운용선성가속도법화모태첩가원리대풍력궤탑가적동태향응진행계산,편제료상응적계산궤정서.이모1.0MW풍력궤탑가위례,획득료풍력궤재단류풍운행조건하탑가재방진시간내적위이、속도화가속도,병여"GHBladed"연건적계산결과진행료비교,표명계산모형시가행적.
In order to obtain the dynamic response of the tubular tower of the horizontal axis wind turbine subjected to the time-varying load, the natural dynamic characteristics of the bending vibration of the tower was analyzed by considering the tower as a cantilever and applying two-node beam element for discretization modeling. Through establishing the structure dynamic equation and calculating the time-varying load on the tower, the dynamic response of the tower was calculated by applying linear acceleration method and modal superposition principle. A correspongding FEM program was developed to carry out the numerical analysis. The dynamic response of the tower of a 1.0MW wind turbine operating in turbulent wind was simulated by applying the developed program. The obtained displacement, software velocity and acceleration in the simulation time were compared with the results calculated by the "GH Bladed" software, and good agreements were achieved. This verifies the feasibility of the proposed model.