摘要
风致疲劳是长期积累的过程,单个风荷载事件可能不会导致结构的立即破坏,且不同材料和构件之间的相互作用、应力集中、局部应力等影响塔架受力关系,难以分析不同方向上的空气荷载力,因此,对疲劳寿命的识别精度不佳。对此,提出陆上风电钢混组合结构塔架风致疲劳寿命识别方法。利用SESAM/GeniE模块,将实际结构转化为有限元模型,计算出塔架结构不同方向上的空气动力荷载,并将其进行组合,即可得到综合荷载值;通过分析塔架外力荷载与疲劳寿命之间的关系,累加综合损伤值,即可得到塔架的风致疲劳寿命的识别结果。实验结果表明,采用文中所述识别方法对风电钢混组合结构塔架疲劳寿命进行识别时,随着风速的不断提高,相同节点处的塔架疲劳损伤量也有所变化,识别结果与实际情况之间的应力响应均方根较低,说明该方法具备较高的识别精度。
Wind-induced fatigue is a long-term accumulation process,and a single wind load event may not cause immediate damage to the structure.The interaction between different materials and components,stress concentration,local stress,and other factors affect the stress relationship of the tower,making it difficult to analyze the aerodynamic loads in different directions.Therefore,the accuracy of identifying fatigue life is poor.A method for identifying the wind-induced fatigue life of onshore steel-concrete hybrid wind turbine tower is proposed.The SESAM/GeniE module is adopted to convert the actual structure into a finite element model and calculate the aerodynamic loads in different directions of the tower.Then the comprehensive load value is obtained by combining the aerodynamic loads;by analyzing the relationship between external load and fatigue life of the tower and accumulating the comprehensive damage value,the identification result of wind induced fatigue life of the tower can be obtained.The experimental results indicate that when applying the identification method described in this paper to identify the fatigue life of steel-concrete hybrid wind turbine towers,the fatigue damage amount of towers at the same node also changes with the continuous increase of wind speed.The root mean square of the stress response between the identification results and the actual situation is low,indicating that this method can obtain high identification accuracy.
作者
徐江涛
师振贵
黄赐荣
Xu Jiangtao;Shi Zhengui;Huang Cirong(Henan Traffic Technician College,Zhumadian,Henan,463000;SINOPEC Xinxing Petroleum Co.,LTD.,Beijing,100083;POWERCHINA East China Survey,Design and Research Institute Co.,LTD.,Hangzhou,Zhejiang,311122)
出处
《石油化工设备技术》
CAS
2024年第4期30-34,I0002,共6页
Petrochemical Equipment Technology
基金
中国博士后科学基金会(批准号:2023M733316)资助的课题。
关键词
风电钢混组合结构
塔架
风致疲劳
寿命识别
空气荷载力
steel-concrete hybrid wind turbine
tower
wind-induced fatigue
life identification
aerodynamic loads
