Full Vehicle NVH CAE Methodology Development to Address Tailgate Rattling on a Future Tata SUV 2019-26-0213
In recent years, car manufacturers have been working intensively on new ways to improve the quality of interior trims, as it directly reflects on customers’ perception of quality and can easily become a source of after sales complaints. Consequently, elimination of squeak and rattle has become one of the main concerns for car manufactures lately.
Traditionally, rattle problems are found and fixed with physical tests at the late design stage, mainly due to lack of up-front CAE simulation prediction methodology and tools availability. This article presents a finite element based methodology for the improvement of rattle performance of a vehicle tailgate. In this study, appropriate finite element (FE) modeling technique has been introduced to accurately predict occurrence of tailgate rattle. Simulation process using commercial software “Nastran” employing modal and forced frequency response analyses is illustrated. Design modifications incorporated for performance improvement of rattling on a current and future Tata SUVs are elucidated.
Correlation study performed on a present SUV, with BSR inputs at rear left tire and acceleration responses measured on body and tailgate, is also presented which validates the simulation methodology and results. Usefulness of this study to predict tailgate rattling in future Tata SUVs is underlined with an example.