The rear axle carrier (RAC) is the central part of the rear-axle construction on rear-wheel-driven BMW vehicles and provides support and isolation for the wheels and the differential. Finite element (FE) modelling is used to optimize the design of the RAC and to guarantee superior performance. The model was validated using experimental modal analysis (EMA) and precision dynamic data was measured with a 3-D Scanning Vibrometer.

Download application note >>

Squeak & Rattle performance is an increasingly important component to customer satisfaction in the automobile industry. Normally Squeak & Rattle performance in a new car is tested during the validation phase prior to the start of production. In order to reduce the number of Squeak & Rattle issues during validation, a robust design is required. To achieve right the first time designs for GM projects, thus avoiding unnecessary development delays, a comprehensive Squeak & Rattle simulation tool was used. However, before the simulation tool can be used effectively, the correct representation of a part’s dynamic behavior must be known. Therefore, a 3-D scanning vibrometer was used to measure the dynamic behavior of each interior car part in order to improve the modal correlation. The combination of the 3-D vibrometer data and the simulation tool has helped engineers achieve a better understanding of how to correctly assemble automotive interior parts to avoid disturbing squeaks and rattles.  

Download full article >>