A new identification method for impact load is proposed based on the transient statistical energy analysis theory. Firstly, the location and input energy of impact load are identified from the averaged kinetic energy responses of system according to energy balance equation. Secondly, the impact load amplitude spectrum is identified from the obtained input energy of impact load based on Parseval theorem under the assumption of constant value on itself within each analytical frequency band. Lastly, a parametric fitting approach is developed so as to determine further the time history of impact load for the given time domain waveform. The approach is validated through a simulated study on impact load identification of a plate-shell assembled structural system. The results show that the input energy can be identified accurately using the present identification method. The computed impact load amplitude spectrums have reasonable agreements with the measured ones. Besides, the identified time history of impact load is of high accuracy.
展开▼
