Abstract—An exhaust system has various aspects including vibrations, acoustics, thermal distribution and durability in addition to its interface with the vehicle. Presently exhaust systems are developed to minimise noise, minimise emissions, increase durability, minimise corrosion, better serviceability and make it economically viable. Modal analysis is the study of dynamic behaviour of structure at its various natural frequencies by studying its mode shapes. Marcus Myrén and Thomas Englund used beam elements, rigid elements and mass elements to represent an exhaust system in their work for simulation purpose. In this paper modal analysis of an automotive exhaust system for a passenger car was studied and a combination of shell and solid elements are used to represent the exhaust system to get better results in modal frequency domain. The exhaust system was modelled using Catia and discretized using Hypermesh, solved using ABAQUS solver. The results were viewed in HYPERVIEW and excitation points were found out in transverse direction.

Index Terms—Automotive exhaust system, Finite element analysis, Model analysis

Cite: D Jai Balaji, P V Srihari, and Veeranna B Sheelvanth, "Model Frequency Analysis of Automotive Exhaust System," International Journal of Mechanical Engineering and Robotics Research, Vol. 3, No. 1, pp. 332-337, January 2014.