EXPERIMENTAL MODAL ANALYSIS OF PASSENGER CAR ENGINE OIL PAN USING FEM AND FFT ANALYZER

Ramesh S, Maruthi Prashanth B H

Abstract: Generally a lubricating oil sump is used to lubricate all the moving components in any IC engine. A wet sump design for engines uses the crankcase as a built-in reservoir for oil. In general, oil sump is subjected to engine excitation frequencies which may cause resonance if it coincides with natural frequencies of the oil sump. This resonance may result into severe damage. This paper deals with the study of existing oil sump of a sedan class car. Mainly this paper will focus on the modal analysis of the oil sump by Experimental analysis and its comparison with FEA results. Oil sump also affects NVH characteristics of engine. Modal analysis of oil sump is done using MSC Nastran to determine the vibration characteristics of sump. The results show that the range of natural frequency is avoided marginally and the total deformation is within the range.

Keywords: Oilpan,FEM , Mode shapes, FFT,Frequency Response Function

DOI: https://doi.org/10.15623/ijret.2017.0603001