A Hierarchical Impact Force Reconstruction Method for Aerospace Composites

This research work presents a hierarchical method able to reconstruct the time history of the impact force on a composite wing stringer-skin panel by using the structural responses measured by a set of surface bonded ultrasonic transducers. Time reversal method was used to identify the impact location by the knowledge of structural responses recorded from a set of excitation points arbitrarily chosen on the plane of the structure. Radial basis function interpolation approach was then used to calculate the transfer function at the impact point and reconstruct the impact force history. Experimental results showed the high level of accuracy of the proposed impact force reconstruction method for a number of low-velocity impact sources and energies.

[1]  E. Jacquelin,et al.  Force reconstruction: analysis and regularization of a deconvolution problem , 2003 .

[2]  Francesco Ciampa,et al.  A structural health monitoring technique for the reconstruction of impact forces in aerospace components , 2017 .

[3]  Michele Meo,et al.  Impact identification on a sandwich plate from wave propagation responses , 2005 .

[4]  Zhanjun Wu,et al.  Determination of impact events on a plate-like composite structure , 2016, The Aeronautical Journal.

[5]  Ugo Galvanetto,et al.  Effects of the transfer function evaluation on the impact force reconstruction with application to composite panels , 2014 .

[6]  J. F. Doyle,et al.  Impact force identification from wave propagation responses , 1996 .

[7]  Francesco Ciampa,et al.  Impact source localisation in aerospace composite structures , 2017 .

[8]  Babu Paul,et al.  Acoustic Source Localization , 2013 .

[9]  Francesco Ciampa,et al.  Factors affecting the imaging of the impact location with inverse filtering and diffuse wave fields , 2016 .

[10]  Ettore Barbieri,et al.  Impact localization in composite structures of arbitrary cross section , 2012 .

[11]  Jonghyun Park,et al.  Monitoring Impact Events Using a System-Identification Method , 2009 .

[12]  Francesco Ciampa,et al.  Impact localization on a composite tail rotor blade using an inverse filtering approach , 2014 .

[13]  B. Fornberg,et al.  Radial basis function interpolation: numerical and analytical developments , 2003 .