<?xml version="1.0" encoding="UTF-8"?> <article key="pdf/3170" mdate="2009-07-24 00:00:00"> <author>M. H. Pol and A. Bidi and A. V. Hoseini</author> <title>Estimation of Natural Frequency of the Bearing System under Periodic Force Based on Principal of Hydrodynamic Mass of Fluid</title> <pages>835 - 839</pages> <year>2009</year> <volume>3</volume> <number>7</number> <journal>International Journal of Mechanical and Mechatronics Engineering</journal> <ee>https://publications.waset.org/pdf/3170</ee> <url>https://publications.waset.org/vol/31</url> <publisher>World Academy of Science, Engineering and Technology</publisher> <abstract>Estimation of natural frequency of structures is very important and isnt usually calculated simply and sometimes complicated. Lack of knowledge about that caused hard damage and hazardous effects. In this paper, with using from two different models in FEM method and based on hydrodynamic mass of fluids, natural frequency of an especial bearing (Fig. 1) in an electric field (or, a periodic force) is calculated in different stiffness and different geometric. In final, the results of two models and analytical solution are compared.</abstract> <index>Open Science Index 31, 2009</index> </article>