تجزیه و تحلیل حساسیت برای سازه های در معرض تحریک تصادفی ثابت

A method for sensitivity analysis of stationary random vibration is proposed within the framework of pseudo-excitation method (PEM). As the stationary random vibration analysis is transformed into harmonic vibration analysis, therefore the sensitivity analysis of stationary random responses is transformed into sensitivity analysis of pseudo harmonic responses of structures subjected to pseudo harmonic excitations. Using the PEM principle once again, the formulae for calculating the sensitivities of power spectrum density (PSD) and variances of random responses are derived. Based on the above work, the study of statistical characteristics of stationary random responses for structures with uncertain parameters is carried out.