VIBRATION ANALYSIS OF AN AUTOMOTIVE SILENCER

Automotive silencer plays an important role in dyna mic performance of the exhaust system. As silencer is located at the tail end of the exhau st system with minimum support,it is subjected to intense vibrations. These vibrations c ause localized stresses in silencer. The vibrations and stresses are analyzed by finite elem ent method. Modal analysis is performed to evaluate dynamic characteristics of the silencer. I t is observed that natural frequencies are away from excitation frequency. Further,dynamic fr equency response analysis is performed with 3G acceleration in all directions varying with frequency. It is noticed that the stresses are concentrated at a joint between inlet pipe and flan ge and these stresses are above the material yield stress limit in X and Y directions. Hence,in order to reduce the induced stresses,the structural modification in silencer is proposed and subsequent analysis is carried out. The obtained stresses are below the yield stress limit in X as well as Y direction. The FEM results are verified by experimental results. https://www.ijiert.org/paper-details?paper_id=14022