文章摘要
高柔风电塔的残余振动控制优化设计
Optimum design of tall and slender wind turbine tower for residual vibration reduction
投稿时间:2018-03-21  修订日期:2018-04-10
DOI:
中文关键词: 风电塔  柔性塔  优化设计  残余振动  紧急停机
英文关键词: wind turbine tower  slender tower  optimization design  residual vibration  emergence shutdown
基金项目:
作者单位E-mail
鲁一南 大连理工大学工程力学系 luyinan@mail.dlut.edu.cn 
程耿东 大连理工大学工业装备结构分析国家重点实验室 chenggd@dlut.edu.cn 
刘晓峰 北京金风科创风电设备有限公司  
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中文摘要:
      高柔风电塔在停机后往往会发生长时间且激烈的残余振动,严重影响风电塔的安全。为了确保风电塔的安全运行,本工作研究基于残余振动控制的多约束单管型风电塔的优化,由于降低风电塔建造成本的重要性,我们以最小化材料体积为目标函数,按照将塔架设计成柔性塔的要求设定塔架的固有频率约束,将停机激励下的残余振动的降低比例作为约束。为了避免计算残余振动及其灵敏度所需的耗时的瞬态动力学分析,采用二次型积分形式的性能指标衡量结构的残余振动,基于李雅普诺夫方法实现了对上述性能指标及其灵敏度计算的大幅简化。另外,考虑到风电塔设计中也需考虑塔顶位移约束,我们采用计算整机荷载的专业软件Bladed得到停机工况下的风荷载,并计算塔顶位移。比较了采用塔顶位移约束和残余振动约束的优化结果,同时对阻尼器的分布进行拓扑优化,希望对高柔风电塔的设计研究有参考价值。
英文摘要:
      For tall and slender wind turbine towers, the long-time excessive residual vibration due to resonance after emergency shutdown operation poses imminent threat to their safe operation. To ensure the safe operation and reduce the construction cost of wind turbine towers, a residual vibration control based structural optimization, is presented in this work. The objective function is minimum structural volume and the natural frequency is constrained to ensure the tower a slender design. A quadratic integral index which measures the residual vibration globally is constrained to control the effect of emergency shutdown. With the Lyapunov’s second method, the quadratic integral index and sensitivities are simplified into matrix forms, which avoid the transit dynamic analysis for residual vibration and reduces computational time to a great extent. In addition, the constraint on tower top displacement is also taken into account in the design of wind turbine towers. To calculate the displacement at the top of the tower, the professional software Bladed is applied to obtain the wind load at emergency shutdown. The paper compares the results of the two constraints, and the topology of the damper is optimized at the same time, which makes the study more relevant in industrial applications.
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