Abstract: A new method was presented, which uses acceleration through mixed integration in time-frequency domains to obtain dynamic displacement. This method conducts a frequency domain integral and a time domain integral. A compartitive analysis made between the calculation result and test result by mean of acceleration meter shows that test dynamic displacement by means of Mixed integration in timcfrequcncy domains can significantly reduce the error.

Key words: Mixed integration in time-frequency domains, Dynamic displacement, Integration in time domains, Integration in frcqucncy domains, Acceleration