Abstract
A structural damage localization method based on deflection influence surfaces (DIS) calculated by the three-dimensional (3D) boundary element method (BEM) is proposed. By combining the 3D BEM with Structural Properties Intelligent Analysis Programs (SPIAP), the static equilibrium method (SEM) is performed on a square plate. Then, all the deflection values are automatically extracted by the SPIAP for the purpose of using the optimized bivariate polynomial function (BPF) to fit the DIS. The accuracy of the SPIAP-fitted DIS is proved by the optimized BPF program. Finally, a structural damage localization module is developed and verified through an experimental example. The numerical and experimental results indicate that compared to the analytical solution, the deflection calculation error of the square plate is no more than 1.8‰. Moreover, the damage localization accuracy of the simply supported beam under single-damage and double-damage cases has been improved by 28.6% and 16.7%, respectively.
Published Version
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