Time-domain identification technology for dynamic load locations

The actual measured vibration acceleration signals were analyzed and the dynamic load number was identified with GDE algorithm based on Gerschgorin's disk theorem.The structural finite element model was built,then the dynamic load identification method in time-domain based on orthogonal polynomial fitting was used to fit the equivalent dynamic loads at virtual locations.The mathematical model of dynamic load location identification in time-domain was built based on the optimization theory.The root mean square value of the result vector of the model was calculated and taken as a criterion to identify dynamic load locations.The mean value discriminating coefficient method for dynamic load location identification was proposed.Numerical simulation and experimental results showed that the proposed method is correct and feasible to idetntify the locations of multiple harmonic loads or arbitrary time-varying dynamic load.