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Fluid Structure Interaction Study of Damper for Swish and Rattle Noise Refinement
S.S. Kulkarni, , B. Ravi, M.R. Saraf
Published in Springer Science and Business Media Deutschland GmbH
2021
Pages: 367 - 377
Abstract
Swish and rattle noise of four-wheeler damper is studied using fluid structure interaction with contact nonlinearity approach. Bending mode coefficient for flexible orifice used in damper piston has been derived, which tends to avoid swish and rattle characteristics. Full 360° damper piston assembly model has been analyzed in order to capture the bending modes of flexible orifice used in piston. Arbitrary Lagrangian–Eulerian (ALE) formulation is used for simulating damper oil and nonlinear orifice structures. Contact algorithm has been considered for Lagrangian orifice subjected to variation in oil pressure. Frictional effects are considered for orifice structures. Comparatively fine mesh is prepared between oil and orifice interface. Oil flow velocity in operating regimes has been altered by changing the oil flow paths. Keeping the same discharge quantity, the number of notches of fixed orifice has been altered from 6 to 8 which reduced oil velocity from 0.68 to 0.51 m/s. Also, the bending modes of flexible orifice have been altered by changing the number of piston ports from 6 to 8 which reduced the oil velocity from 9.4 to 8.7 m/s. Pressure–velocity characteristics have been evaluated to generate the desired damping performance along with acoustic refinements. FSI model correlates well with the test results in accordance with damping characteristics and used to reduce vibrations of piston assembly. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About the journal
JournalData powered by TypesetLecture Notes in Mechanical Engineering
PublisherData powered by TypesetSpringer Science and Business Media Deutschland GmbH
ISSN21954356