Time-Domain Inversion Method of Impact Loads Based on Strain Monitoring Data

A helicopter deck is the main load-bearing component under emergency landing conditions for helicopters. However, it generally difficult to directly obtain load from measurements due high randomness of position. As design deck, very important its structural design. large value leads an overly conservative and affects control ship’s weight center gravity, while a small may lead lack security affect safety ship. result, time domain inversion method, which based on strain monitoring data, effective method obtaining load. In this study, grillage model experiment was conducted study method. The impact simulated by falling body impact, history response were recorded sensors. calculated with different methods, including direct inverse, truncated singular decomposition (TSVD), Tikhonov regularization methods. solution accuracy methods number sensors needed compared. results demonstrated that four measurement points along L-curve determination criterion showed better performance capturing features.