1次元波動現象を利用した連続体運動方程式の係数同定研究(機械力学,計測,自動制御)

概要

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Equations of motion for one-dimensional continuous system are studied to identify unknown coefficients of that equation. Several new formulae are presented to calculate unknown coefficients. Experiments are achieved to verify accuracy of the present method. Good agreement suggests that the present method is reliable to identify unknown coefficients of the equation of motion. Following are applications of the present method. (1) Sound absorbing materials are tested. Complex sound propagation speed and complex effective density of the material are identified. (2) Wave dissipative offshore structure is also tested. Amplitude-dependent complex wave propagation speed in that structure are identified. (3) Perforated panels are tested to determine pressure loss coefficient under alternating flow condition. (4) Three-layered vibration damping steel beams are tested to determine complex equivalent flexural rigidity of the beam. Loss factor of the beam are measured in successive frequencies. (5) Cables with tension are tested. Both tension and flexural rigidity of the cable are identified using least square method from several resonance frequencies.
一般社団法人日本機械学会の論文
2002-07-25