Browse Publications Technical Papers 2018-01-1542

Optimizing Vehicle NVH using Multi-Dimensional Source Path Contributor Paradigm. 2018-01-1542

Automotive Community is moving towards lightweight vehicle design with more powerful engines. This is increasing the demand for more optimized NVH design. Source-Path-Contributor (SPC) analysis is one of the ways to draw a holistic picture of any NVH problem. In this paper we have studied a very common NVH problem i.e. “Low Frequency Booming Noise and Steering Vibration “, in one of our development model. We have studied all the three dimensions of SPC paradigm and proposed a feasible and optimized solution at the Source, Path as well as the Contributor. For source we focused on driveline optimization. This was done by studying torsional fluctuations. Transfer Path Analysis is done to identify the Critical Paths. Optimization of suspension bush parameter is done using the Dynamic Elastomer Testing machine for improved performance. Finally for the Contributor, Operation Deflection Shape was studied to identify the major panels responsible for deterioration in NVH Quality. An optimized design of Dynamic dampers is done using the CAE tools and Dynamic Elastomer testing machine to propose a feasible and effective solution. This kind of approach leads us to identify the root cause at Source, Path and Contributor level, thereby helping us to have a highly optimized NVH solution in terms of cost, weight and development feasibility.


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