Effect of Load Frequency on Dynamic Similitude of Scaled Model

• Published in: Applied Mechanics and Materials Vol. 448-453; pp. 3508 - 3513
• Main Authors: Song, Yu Chao, Yu, Hong Liang, Huang, Chao Ming, Cai, Yan Nian
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.10.2013
• Subjects: Finite element analysis; Mechanics; Scale models; Similitude; Finite Element Method (FEM); Test; Scaled Model; Excited Frequency
• ISBN: 3037859121; 9783037859124
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.448-453.3508

The similitude requirement of excited load was deduced to maintain the consistent vibration between scaled model and prototype structure, based on the modal theory of multi-DOFs systems. The similitude of load frequency was another demand to maintain the consistent vibration, with the similitude of structure size and load magnitude. The dynamic similitude problem of a liquid tank was studied by finite element method and test analysis respectively. The results show that the similitude of load frequency is the insurance for the consistency of prototype and scaled model structures vibration. In a case the magnitude error of displacement is 8% to 10%, and the displacement and acceleration have all changed distinctly without the similitude of load frequency. All the results indicate that the similitude of load frequency is the key factor to analyze the scaled model dynamics correctly.