• 其他栏目

    蔡建

    • 副研究员 硕士生导师
    • 招生学科专业:
      力学 -- 【招收硕士研究生】 -- 航空学院
      仪器科学与技术 -- 【招收硕士研究生】 -- 航空学院
      机械 -- 【招收硕士研究生】 -- 航空学院
    • 性别:男
    • 毕业院校:南京航空航天大学
    • 学历:南京航空航天大学
    • 学位:工学博士学位
    • 所在单位:航空学院
    • 办公地点:南京航空航天大学(明故宫校区)A9-512
    • 联系方式:江苏省南京市秦淮区御道街29号 南京航空航天大学 智能材料与结构研究所 330信箱(邮编210016) 电子邮箱:caijian@nuaa.edu.cn
    • 电子邮箱:

    访问量:

    开通时间:..

    最后更新时间:..

    High reliability damage imaging under non-uniform environmental temperature variations based on modified dynamic time warping

    点击次数:

    影响因子:8.4

    发表刊物:Mechanical Systems and Signal Processing

    摘要:In practical applications of Lamb wave monitoring, the environmental temperature fields usually vary non-uniformly over the monitored structures, which can inconsistently affect the wavepackets of every diagnostic signal and reduce the reliability of final detection results. A number of temperature compensation methods have been reported. However, under the complicated non-uniform temperature variations, many methods are deteriorated in their performance or require large amount of Lamb wave data. To effectively improve the reliability of Lamb wave damage detection under non-uniform temperature variations, modified dynamic time warping (MDTW) is presented in this paper. In MDTW, with the flexible time alignment ability of dynamic time warping (DTW), the non-uniform temperature variation effects on Lamb wave signals can be compensated just requiring one set of baselines. Furthermore, to preserve the damage information in the compensated signals, the warping adjusting mechanism is introduced to resolve the temperature over-compensation problem of traditional DTW. This makes MDTW a robust non-uniform temperature compensation method for high reliability Lamb wave detection. After the basic principle of DTW is analyzed, MDTW is proposed and numerically validated. Then, a MDTW-based Lamb wave imaging method is developed for high reliability damage imaging, in which a triple-suppression of non-uniform temperature variations can be accomplished. Finally, the efficiency of MDTW and MDTW-based imaging is demonstrated by the temperature experiment of A0 mode Lamb wave damage imaging on an aluminum plate with its temperature field non-uniformly varied by 13℃∼43℃.

    论文类型:期刊论文

    论文编号:110737

    学科门类:工学

    卷号:203

    是否译文:

    发表时间:2023-11-15

    收录刊物:SCI

    合写作者:Fei Weimin,Fu Shangchen,Lu Mingyu,Yang Hainan