Essay On Modal Analysis

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Structural and modal analysis of FSAE space frame chassis Aakash.V1 & Gokul Krishnakumar2 1&2School of mechanical and building sciences, VIT University, Vellore, India aakashv2014mcd0018@vit.ac.in Abstract : This paper aims to improve the stability of the race car design under various load conditions. Two basic analyses were done using Finite Element Model (FEM) techniques such as static structural and modal analysis to optimize the design of the frame especially used for Formula SAE/ Formula Student chassis. Analysis is done for improving the torsional stiffness of the frame which results in quick response during manoeuvring and the front impact, side impact and rear impact of the space frame to improve the safety features. The analysis is done on dynamic load factor which varies time to time. The worst case scenario is considered for all the above case. The dynamic load transfer and lateral load transfer are calculated to apply loads for analysis. Modal analysis is done with three types of assumption. Initially the analysis are done by applying loads to the suspension mounting points(translational) , later the whole space frame is considered as the torsional bar and finally both translational and torsional are combined together for the analysis. Keywords — Finite element model, chassis, …show more content…

Applying boundary conditions plays a vital importance in producing FEA result. The boundary conditions and loads applied will decide the torsional stiffness value calculated using the FE method. The boundary conditions in this analysis have been kept the same so as to compare the successive design iterations. Without common boundary conditions and load cases torsional stiffness values would vary and a comparison would be absurd and meaningless. Various load factors is applied to the chassis to arrive the stress and deformation of the chassis. In the following section it is

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