Shen Min Acoustic wave propagation in magnetorheological fluids based on an effective density fluid model [] / Shen Min, Huang Qibai // Проблемы механики современных машин : материалы 6 Международной конференции (29 июня – 4 июля 2015 г.) / ред. В. С. Балбаров. - Улан-Удэ, 2015. - Т. 3. - С. 243-250. - Библиогр. в конце ст. . - ISBN 978-5-89230-617-1 Рубрики: Техника--Материаловедение Кл.слова (ненормированные): магнитореологические жидкости -- плотность жидкости -- упругость -- акустические волны -- магнитные поля -- коэффициент затухания -- акустические модели -- био-модели Аннотация: Magnetorheological fluid (MRF) represents a class of smart material whose rheological properties change in response to the magnetic field, which resulting in the drastic change of the acoustic impedance. This paper presents an acoustic propagation model that approximates a fluid-saturated porous medium as a fluid with a bulk modulus and effective density (EDFM) to study the acoustic propagation in the MRF materials under magnetic field. The effective density fluid model derived from the Biot’s theory. Some minor changes to the theory had to be applied, modeling both fluid-like and solidlike state of the MRF material. The attenuation and velocity variation of the MRF are numerical calculated. The calculated results show that for the MRF material the attenuation and velocity predicted with this effective density fluid model are close agreement with the previous predictions by Biot-Stoll model. In this agreement we demonstrate that for the MRF acoustic prediction the effective density fluid model is an accurate alternative to full Biot’s theory and is much simpler to implement. Перейти к внешнему ресурсу: полный текст Доп.точки доступа: Балбаров, В. С. \ред.\; Huang Qibai |