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

在本研究中，开发了逆计算方法，该方法可以根据应变的测量时程估计出冲击载荷的峰值、持续时间、冲击脉冲和冲击载荷的位置。利用结构固有频率、实测应变的模态振幅和相位角以及由实测应变历史估计的初始规划结构的固有模态，建立了非测点应变时程的估计方法。通过夹紧梁试件和加筋板试件的冲击试验结果，验证了所建立的冲击载荷反计算方法。

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.