基于时间反转法的复合材料板声发射源定位  

Acoustic Emission Source Localization of Composite Plate Based on Time Reversal

作　　者：何明明 丁显 宫永立 王磊[1] 柳亦兵[1] He Mingming;Ding Xian;Gong Yongli;Wang Lei;Liu Yibing(Key Laboratory of Power Station Energy Transfer Conversion and System(North China Electric Power University),Ministry of Education,Beijing,China;China Green Development Investment Group Co.,Ltd.,Beijing,China)

机构地区：[1]华北电力大学电站能量传递转换与系统教育部重点实验室,北京 [2]中国绿发投资集团有限公司,北京

出　　处：《科学技术创新》2023年第7期1-7,共7页Scientific and Technological Innovation

摘　　要：针对复合材料平板定位的声发射源定位问题,提出了一种基于数字增强技术的时间反转定位方法。考虑复合材料的各向异性对定位结果的影响,在原来时间反转定位的基础上,采用速度与角度拟合多项式消除各向异性对定位结果的影响,实现对复合材料板声源的精确定位。通过仿真对该方法进行验证,并与原方法定位结果进行对比。仿真结果表明本文提出的方法相比原方法具有较高的精度。Aiming at the localization of acoustic emission sources in composite plate positioning,a time reversal localization method based on digital enhancement technology is proposed.Considering the influence of anisotropy of composite materials on the positioning results,on the basis of the original time reversal positioning,the velocity and angle fitting polynomial is used to eliminate the influence of anisotropy on the positioning results,and realize the accurate positioning of the sound source of the composite plate.The method is verified by simulation and compared with the positioning results of the original method.The simulation results show that the proposed method has higher accuracy than the original method.

关 键 词：复合材料 各向异性 声发射 定位 时间反转 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3