Fundamental Investigation on an Oil Damper : 3rd Report Comparison of Analyses Based on Cylindrical Coordinates and Cartesian Coordinates

概要

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This paper deals with a theoretical research of an oil damper, whose piston is vibrating in a viscous fluid filling a fixed circular cylinder. In the previous report, transforming the annular clearance between the cylinder and the piston into a straight channel, the authors induced a drag force acting on the piston from an equation of motion of the fluid expressed in Cartesian coordinates. Therefore the result of this analysis contained an error due to the transformation. So in this report, the authors try to derive a more exact value using an equation represented in cylindrical coordinates. Comparing this solution with the former one, they proved that these are very close to each other, if there is not so much difference between the diameter of piston and the inner diameter of cylinder.
一般社団法人日本機械学会の論文