平稳随机载荷的灵敏度分析识别方法

Here, a segmented time domain identification method based on sensitivity analysis for stationary random dynamic load was proposed. A stationary random dynamic load sample was divided into several segments, and the stationary random dynamic load in each segment was expressed as superposition of sinusoidal series. Sensitivity iterative analysis was used to determine the corresponding sinusoidal series' amplitudes, and then the stationary random dynamic load within this time segment was determined. Finally, all identified stationary random dynamic load segments were combined to obtain the stationary random dynamic load sample identification results. The experimental results showed that the identification method based on sensitivity analysis can identify random dynamic loads on structure well; it has good anti-noise performance.