کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
13448475 | 1843837 | 2020 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparative of conventional and alternative Digital Image Correlation techniques for 3D modal characterisation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
کنترل و سیستم های مهندسی
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چکیده انگلیسی
The integration of Fringe Projection and 2D-DIC is a low-cost optical technique which employs a single camera for full-field 3D displacement measurements using RGB colour encoding to filter coexisting fringe and speckle patterns out from a single image. In this work, this technique was explored together with conventional 3D-DIC for challenging modal analysis on a large aeronautical panel under random excitation. Modal identification was performed using the Least-Squares Complex Exponential approach. Multiple degree-of-freedom methods have been avoided in previous works or just employed in one direction due to high memory requirements to process 3D full-field data. In this work, the 3D modal characterisation was addressed with especial mention to mode shapes. Hardware limitations makes FPâ¯+â¯DIC less sensitive than 3D-DIC and hence more suitable for lower frequencies. Nevertheless, the obtained modal parameters showed high agreement and hence FPâ¯+â¯DIC demonstrated to be a cost-effective alternative for 3D modal analyses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Measurement - Volume 151, February 2020, 107101
Journal: Measurement - Volume 151, February 2020, 107101
نویسندگان
Ángel J. Molina-Viedma, Luis Felipe-Sesé, ElÃas López-Alba, Francisco A. DÃaz,