Experimental Vibration Analysis of Exhaust System

An automobile exhaust system has several functions. Originally it was used for silencing the noise caused by high pressure exhaust gases leaving the engine and for transporting these hot and toxic gases away from the driver’s compartment. The automotive muffler has to be able to allow the passage of exhaust gases whilst restricting the transmission of sound. The durability of that part of the exhaust muffler is therefore crucial. Hence one of important factor for durability is its resonance and corresponding mode shapes. The numerical method involves exhaust muffler design by modeling tool CATIA and meshing of the model is done by using Altair's pre-processing tool HyperMesh. Normal modal analysis is performed by using Msc Nastran.. The results are viewed through Altair's post-processing tool HyperView. The experimental method involves experiment is to conduct an test on a muffler system. For this impact test an impact hammer was used to provide the input force and an tri-axial accelerometer was used to measure the output response. FFT analyser is used to remove the unwanted signals and it transfers the signals to the software. In order to determine the resonance frequencies