STRUCTURAL MODIFICATIONS IN DIESEL ENGINE COMPONENTS TO REDUCE NOISE

Local modifications in structural components have become very important tool to reduce the noise and vibration related problems. Design improvement in structural components can be predicted and optimized for Noise Vibration and Harshness (NVH) issues by using finite element models. This paper presents a methodology to reduce noise radiated from a four-cylinder diesel engine through modification and optimization in structural components using finite element method (FEM) and boundary element method (BEM). The simulation results of radiated noise level from the engine assembly are used for comparison. Mode shapes corresponding to the critical noise are considered for the analysis and optimization to reduce the noise. The procedure focuses on the modification and optimization of the components in local design to reduce noise level, a considerable reduction in overall radiated noise from the engine has been observed.