风电机组混合塔架结构阻尼比的研究  

Research on damping ratio of steel-concrete hybrid tower of wind turbine

作　　者：郝二通 李祎 胡玉龙[2] Hao Ertong;Li Yi;Hu Yulong(Technology Department,Beijing Wanyuan Industrial Company Limited,Beijing 100176 Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;College of China)

机构地区：[1]北京万源工业有限公司技术部,北京100176 [2]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051

出　　处：《可再生能源》2018年第11期1704-1710,共7页Renewable Energy Resources

摘　　要：混合塔架作为风电机组广泛应用的一种高塔架形式,其结构模态阻尼比精度对塔架载荷和成本有着重要影响。基于以材料阻尼比作为输入求解风电机组混合塔架结构阻尼比的有限元分析方法,计算出140 m混合塔架第1阶模态阻尼比为0.96%。为验证该方法的正确性,通过测量阻尼性能差异较大的有机玻璃单件、钢板单件的材料阻尼比,以及有机玻璃与钢板组件的模态阻尼比,以测量的材料阻尼比作为输入开展了有机玻璃与钢板组件模态阻尼比的有限元分析。有限元求解与试验测试的1阶模态阻尼比结果分别为0.570%和0.589%,两者相差3.33%。结果表明,以材料阻尼比作为输入计算混合塔架模态阻尼比的有限元分析方法是正确的。As a kind of widely used high tower for wind turbine,steel-concrete hybrid tower＇s damping ratio has a significant effect on cross-sectional loading and economic design of tower.Based on a finite element method（FEM） to solve the damping ratio of 140 m steel-concrete hybrid tower using material damping ratio as input, the first modal damping ratio 0.96% was calculated. To prove the correctness of the method, an experimental study,aiming to test damping ratio, on PMMP, steel plate and PMMP-steel plate assembly was conducted,and the damping property of PMMP and steel plate has evident difference. FE simulation of the PMMP-steel plate assembly was also analyzed by inputting test material damping ratio. The first modal damping ratio of FEM result and experimental result are 0.570% and 0.589% respectively, a difference of about3.33%. The result show that the FEM to solve the modal damping ratio of hybrid tower using material damping ratio as input is correct.

关 键 词：风电机组 混合塔架 结构阻尼比 材料阻尼比 模态试验 模态参数识别 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]