Browse Publications Technical Papers 2019-01-1513

Truck front cabin mount tuning for cabin Noise boom elimination and overall interior noise reduction. 2019-01-1513

In today's automobile industry refined NVH performance is a key feature and of high importance governing occupant comfort and overall quality impression of vehicle. This paper interior noise measurement is done on one of the light truck and few dominant low frequency noise booms were observed in operation range. Modal analysis was done for the cabin at virtual as well as experimental level and few modes were found close to these noise booms. Vibrations were measured across the various cabin mounts and it was found that the isolation of front mounts is not effective at lower boom frequencies. Taking this as an input, the mount hardness and profile optimized to shift the natural frequency and hence improve the isolation behavior at the lowest dominant boom frequency. This was followed by static and dynamic measurement of the mounts at test rig level and finally the interior noise measurement after fitment on truck. Boom elimination and overall interior noise reduction is achieved with this approach. This paper takes up a real-time noise scenario , its root cause analysis and establishment of final solution for same. It covers various activities like noise, vibration measurement & analysis, virtual and experimental modal evaluation, mount transmissibility evaluation followed by tuning & design for corrects stiffness, and finally verification at rig and vehicle level. Hence this works runs through complete flow of NVH development cycle. The cabin mount design patent registration is approved.


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