A Study on Inverse Calculation of Impact Load and Structural Response Based on the measured Strain

本研究开发了由实测应变时程估算冲击载荷峰值、持续时间、冲量和位置的反算方法，并开发了利用结构的固有频率、实测应变的振型振幅和相位角估算非实测点应变时程的方法，利用实测的应变历史估算了初始结构的固有模态，并利用固支梁和加筋板的冲击试验结果对所提出的冲击载荷反算方法进行了验证。

In this study, the procedure of inverse calculation method, which can estimate the peak load, time duration, impulse, and location of impact load from measured time history of strains, was developed.And, the method for estimating the time history of strains at the points other than measured points was developed using the natural frequencies of the structure, the mode amplitude and phase angle of measured strain, and the natural modes for the initial planning structure, which were estimated from the measured strain history.The developed inverse calculation technique of impact load was verified using the impact test results for both clamped beam specimen and the stiffened panel specimen.