关于风力轮机叶片主备件具有不同缺陷的声学排放特征和损坏机制的研究
Yanan Zhang1, Shaojie Xue1, Chuanyong Chen2
1School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110159, China.
Polymers
|December 17, 2024
概括
这项研究揭示了风力轮机叶片复合材料中的分层和纹等缺陷如何影响其机械性能并损害进化. 声辐射分析确定了损伤模式,这对于结构完整性监测至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 航空航天工程 航空航天工程
背景情况:
- 风力轮机叶片容易出现缺陷,例如分层和纹.
- 了解这些缺陷对材料行为的影响对于刀片的寿命和性能至关重要.
- 声波发射 (AE) 是监测复合材料损坏的一个有价值的技术.
研究的目的:
- 为了研究风力轮机叶片主材料带有人工缺陷的声辐射 (AE) 信号特征和损伤机制.
- 分析分层和纹缺陷对玻璃纤维增强聚合物 (GFRP) 复合材料的机械性能和损伤演变的影响.
- 将AE数据与显微镜观测相关联,以阐明损伤机制.
主要方法:
- 人工预制GFRP复合材料,可控制分层和纹缺陷.
- 拉力负荷实验,以评估机械性能和AE反应.
- 采集和分析声学排放数据,包括对AE参数的K-means集群分析.
- 显微镜检查以了解物质层面的损伤演变.
主要成果:
- 人工缺陷显著改变了GFRP复合材料的机械性能和损坏演变过程.
- 分层的尺寸和位置,以及纹的面积比,影响材料的损坏机制.
- 在GFRP复合材料中成功识别了损伤模式的AE参数的K-平均集群.
- 分层和纹缺陷表现出类似的损伤模式,具有相似的特征频率范围.
结论:
- 风力轮机叶片复合材料的缺陷严重影响其结构完整性和故障机制.
- 与先进的数据处理相结合的AE分析有效地描述和区分损伤模式.
- 这项研究为风力轮机叶片复合材料的结构健康监测和损伤演变研究提供了必要的见解.
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