Stochastic Simulation Methodology - Accounting Variability Of Key Parameters Affecting Squeak And Rattle Performance

With scores of research and development in hybrid and electric vehicles, interior sound quality becomes a crucial parameter in assessing vehicle ride comfort which is dominated by transient noises. Squeak and Rattle being the prominent undesired transient noises, should be foremost analyzed and eliminated at the design stage pacifying fixation cost to minimal. The Squeak and Rattle performance of an automobile is highly influenced by variation in material properties, durability, manufacturing and assembly tolerances. In this paper, the risk and root cause of Squeak and Rattle on an automobile Instrumental Panel is evaluated using a Finite Element based E-line methodology. For accounting the individual and interactive variability effects of the key parameters, a Stochastic Study is performed on the Finite Element Model. Further, using a least-square-regression model, the key contributors on Squeak and Rattle performance are ranked. Keywords: E-line, Squeak and Rattle, Stochastic, variability, least-square- regression