风力机叶片多体动力学分析

Multi-Body Dynamic Analysis of Wind Turbine Blades

应用Joint beam element的建模方法,建立了风力机叶片的刚柔混合动力学分析模型.运用MSC.ADAMS求解器中的ADAMS/Vibration振动模块分析了额定转速工况下风力机叶片的固有频率和振型.为了验证模型的正确性,采用GH-Bladed软件进行了分析和验证,分析结果表明所建的刚柔混合模型是基本正确的.以1.5 MW风力机叶片为例,计算了风力机叶片的固有频率及振型,从模态分析中得到叶片发生破坏的具体区域是叶片中间到弦长最大的位置.通过频域分析,获得了振动幅值较大的频段范围,为分析振动产生因素提供理论依据.

Rigid-flexible coupled dynamics model of the wind turbine blades was established by using joint beam element modeling method. ADAMS/Vibration of the MSC. ADAMS solver was used to analyze the natural frequency and vibration mode of the wind turbine blades under rated speed. Through the analysis and verification by GH-Bladed,the correctness of the rigid-flexible coupled dynamics model was proved. By the modal analysis of 1.5 MW wind turbine blades, natural frequencies and vibration mode were calculated, and the specific area of damage which occurred range from middle to maximum chord length was obtained. The frequency range of resonance was obtained by frequency domain analysis, which provide the theory basis for the analysis of vibration producing factors.