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Model Set up and Analysis Tools for Squeak and Rattle in LS-DYNA

One of the most important quality aspects during the design process of a vehicle is the provided occupant comfort. Comfort in a vehicle is achieved, among others, through a quiet and durable interior, and through the elimination of Squeak and Rattle noises. A huge amount of different tests take place in laboratories in order to produce interior and exterior components that eliminate the occurrence of such undesirable phenomena. As a result, developing numerical models that explain and predict the behavior of a vehicle in Squeak and Rattle is important. The implementation of automated tools benefits analysts in setting up efficient and robust processes for accurate and straightforward CAE simulations. A simulation method that is used for the Squeak and Rattle numerical analysis is the E-LINE method which focuses on calculating and evaluating the relative displacement between two components in the time domain. Based on this method BETA CAE Systems in cooperation with Volvo Cars has developed a set of special tools in ANSA pre-processor and µETA post-processor for identifying the crucial areas, setting up the LS-DYNA E-LINE model definitions for them, and finally evaluating the corresponding LS-DYNA implicit results. The current paper dives deep in E-LINE method by showing both interior and exterior examples. In addition, it presents the BETA CAE Systems automa ted tools that offer a complete and effective solution in Squeak and Rattle analysis using LS-DYNA, minimizing simulation time consumption and human interaction