摘要
利用梁单元对水平轴风力机塔筒进行有限元离散建模,基于塔筒不同安装状态时的固有频率和振型计算,分析了塔筒涡激共振,计算了发生涡激共振时临界风速下的塔筒最大振幅和惯性力。以某3.0MW风力机塔筒为例,利用名义应力法计算涡激共振产生的塔筒惯性力矩和疲劳损伤,分析了需要避免的塔筒安装状态。结果表明,本文计算模型简便有效,能较快地预测涡激共振对塔筒疲劳特性的影响,从而为风电机组塔筒设计和安全吊装提供了理论依据。
The tubular tower of wind turbine was modeled by using beam element for discretization modeling. Through calculating the natural frequencies and vibration modes of the tubular tower in different installation status, the vortex-induced vibration of tower was analyzed. And then the maximum vibration amplitude and inertial force of tower were calculated under the critical wind speed. Taking the tower of a 3.0MW wind turbine for an example, inertial moments and fatigue damages were calculated by using nominal stress method, and the prerequisite avoided tower installation status was also analyzed. The results show that the proposed model is a simple and effective method to predict the influence of vortex-induced vibration on the tower fatigue characteristics quickly. Therefore, it provides theoretical basis for tower design and safety lifting of wind turbine.
出处
《水电能源科学》
北大核心
2014年第6期134-137,共4页
Water Resources and Power
关键词
风力机
塔筒
涡激共振
疲劳损伤
临界风速
wind turbine
tubular tower
vortex-induced vibration
fatigue damage
critical wind speed
