为探究疲劳加载过程中摆锤式激振器相关参数对叶片振动特性的影响,揭示加载过程中激振器电流的变化规律,基于拉格朗日方程建立叶片摆锤式疲劳加载系统动力学模型,分析摆锤式激振器的动力参数以及与叶片的相互作用,并对叶片进行疲劳加载。结果表明,激振器中旋转质量会改变叶片疲劳加载系统的固有频率,采用实测加载数据中旋转质量与叶片振动之间的实际相位差,修正理论模型,理论电流峰值相对于实际电流误差为8.5%。
Abstract
To investigate the impact of relevant parameters of a rotating eccentric mass exciter on blade vibration characteristics during fatigue loading, as well as to further reveal the variation law of exciter current in actual test, a dynamic model of the rotating eccentric mass fatigue test system is established based on the Lagrange kinetic equation. The dynamic parameters of the rotating eccentric mass exciter and its interaction with the blade are analyzed. The results indicate that the rotating eccentric mass in the exciter will change the modal frequency of the blade fatigue loading system. Based on the actual phase difference between the rotating eccentric mass and the blade vibration in the real loading data, the theoretical model is modified. The current peak predicted by the improved theoretical model has an error of 8.5% relative to the actual current.
关键词
风电叶片 /
摆锤 /
疲劳测试 /
动力学分析 /
负载特性 /
频率响应
Key words
wind turbine blades /
pendulums /
fatigue testing /
kinetic analysis /
load characteristics /
frequency response
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基金
工业和信息化部科技项目（2022-231-222）
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