动态风载作用下叶片疲劳损伤的差异性分析

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (24) : 271-277.

论文

动态风载作用下叶片疲劳损伤的差异性分析

马剑龙1,2,3,吴雨晴1，吕文春1，赵鑫鑫1，孟克其劳1,2,3

作者信息 +

Analysis of fatigue damage differences of blades under dynamic wind load

MA Jianlong1,2,3, WU Yuqing1, L Wenchun1, ZHAO Xinxin1, MENGKE Qilao1,2,3

Author information +

文章历史 +

摘要

随着风力发电机组分散式应用中向人类生产生活环境的延伸，可用风能的稳定性变差，由此导致动态风载对叶片疲劳损伤的影响问题已凸显成为备受关注并亟待诠释的重要课题。作者通过对一年中自然风况数据的比对分析，拟合出了当地三种典型的动态风载数学模型，建立了综合考虑气动力、重力和离心力的叶片疲劳分析模型，并通过实验测试佐证了模型计算的可靠性。在此基础上，揭示了动态风载会对叶片的疲劳寿命产生严重影响，特别是在恶劣扰动风作用下叶片的疲劳寿命缩减率高达近30%。最后，通过叶片不同位置截面上的安全系数和应力诠释了动态风载促使叶片疲劳寿命减小的原因。相关研究成果对于正在兴起的动态风载作用下叶片疲劳损伤的深入探究具有一定的参考价值。

Abstract

With the extension of the distributed application of wind turbine to the human production and living environment, the available wind energy has poor stability, which leads to the problem of the impact of dynamic wind load on the fatigue damage of blades.It has become an important issue that has attracted much attention and needs to be interpreted.Based on the comparison and analysis of the natural wind data in a year, three typical local dynamic wind load mathematical models were fitted.The fatigue analysis model of blade considering aerodynamic force, gravity force and centrifugal force was established, and the reliability of the model was verified by experimental tests.On this basis, it was revealed that the dynamic wind load will have a serious impact on the fatigue life of the blade, especially the fatigue life of the blade under the action of severe disturbance wind will shrink even close to 30%.At last, the reason why the dynamic wind load can reduce the fatigue life of the blade was explained by the safety factor and stress value of the blade in different position section.The relevant research results have a certain reference value for the in-depth study of blade fatigue damage under the rising dynamic wind load.

导出引用

马剑龙1,2,3,吴雨晴1，吕文春1，赵鑫鑫1，孟克其劳1,2,3. 动态风载作用下叶片疲劳损伤的差异性分析[J]. 振动与冲击, 2020, 39(24): 271-277

MA Jianlong1,2,3, WU Yuqing1, L Wenchun1, ZHAO Xinxin1, MENGKE Qilao1,2,3. Analysis of fatigue damage differences of blades under dynamic wind load[J]. Journal of Vibration and Shock, 2020, 39(24): 271-277

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