摘要
介绍湍流风场模型中常用的达文波特功率谱密度模型,根据随机振动理论,确定利用达文波特速度谱模拟风速湍流,并应用有限元软件ANSYS实现风力机塔架模型的建立及湍流风场的数值模拟。通过在风场中对风机塔架进行结构动力特性分析,得到塔架前32阶振动频率及各阶模态、节点速度变化值及节点湍流强度,数值模拟结果符合结构振动规律,可为工程实际提供参考。
The Davenport power spectral density model was introduced in the turbulent wind field. According to random vibration theory, Davenport wind velocity spectrum used to simulate the turbulent wind was completed, the application of the wind turbine tower model in Ansys and turbulence field numerical simulation were realized. Through the dynamic analysis of a tower structure in wind field, the tower vibration frequencies and modes, the wind speed changes of nodes and nodes＇ turbulence intensity were obtained. The simulation results show that the structural vibration is accorded with the vibration rules, which can be provided references for actual projects.
出处
《中国电力》
CSCD
北大核心
2008年第11期71-73,共3页
Electric Power
基金
中国电机工程学会电力青年科技创新项目(2008-16)
吉林省教育厅“十一五”重点科研项目(2007-51)
