Browse Publications Technical Papers 2019-01-1541
2019-06-05

Structure-borne prediction on a tire-suspension assembly using experimental invariant spindle forces. 2019-01-1541

Road induced noise is getting more and more significant in context of the electrification of the powertrain. The automotive industry is seeking for technologies to predict the contribution of vehicle components upfront, early in the development process. Classical Transfer Path Analysis (TPA) is a well-established technique that successfully identifies the transmission paths of noise and vibration from different excitation sources to the target responses, but has some drawbacks, such as that it requires the physical availability of the vehicle. To achieve shorter development cycles, avoid costly and time-consuming design iterations, and due to the limited availability of prototypes, engineers derived a method that addresses these requirements. Component-based TPA is a relatively new TPA approach that allows to characterize the source excitation by a set of equivalent loads (blocked forces) independently from the receiver structure and to predict its behavior when coupled to different receivers. FBS is applied in order to obtain the coupled assembly. However, there are a number of challenges affecting its applicability, such as the proper modelling of the coupling degrees of freedom and the difficulty to access the interface connection points. Geometrical reduction aims to solve those inconveniences. This paper aims to investigate these challenges of component-based TPA by measurements on a tire experimental case in static condition. The source component (the tire) is characterized by a set of blocked forces and transfer functions identified on a dedicated tire test-rig. These obtained loads are combined with the FRF’s of the fully assembled system, obtained by using experimental substructuring methods. The application of FBS together with geometrical reduction in the frame of component-based TPA will be analyzed.

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