Open Access

ARTICLE

An Inverse Problem in Estimating Simultaneously the Time-Dependent Applied Force and Moment of an Euler-Bernoulli Beam

Cheng-Hung Huang^1,2, Chih-Chun Shih¹

1 Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan 701, Tai-wan, R.O.C.
2 E-mail: chhuang@mail.ncku.edu.tw

Computer Modeling in Engineering & Sciences 2007, 21(3), 239-254. https://doi.org/10.3970/cmes.2007.021.239

Abstract

An inverse forced vibration problem, based on the Conjugate Gradient Method (CGM), (or the iterative regularization method), is examined in this study to estimate simultaneously the unknown time-dependent applied force and moment for an Euler-Bernoulli beam by utilizing the simulated beam displacement measurements. The accuracy of this inverse problem is examined by using the simulated exact and inexact displacement measurements. The numerical experiments are performed to test the validity of the present algorithm by using different types of applied force and moment, sensor locations and measurement errors. Results show that excellent estimations on the applied force and moment can be obtained with any arbitrary initial guesses.

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