2013 Fiscal Year Final Research Report

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

Research Project

Project/Area Number	23656551
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Naval and maritime engineering
Research Institution	Kyushu University
Principal Investigator	YOSHIKAWA Takao 九州大学, 工学(系)研究科(研究院), 教授 (50380572)
Co-Investigator(Kenkyū-buntansha)	MAEDA Masahiro 九州大学, 大学院・工学研究院, 助教 (70173713)
Project Period (FY)	2011 – 2013
Keywords	逆解析 / 構造応答 / ひずみ計測 / 外力評価 / 衝撃荷重
Research Abstract	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.

(4 results)