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Development of Parametric Acoustic Air FEA Mesh for Tire Noise Performance Calculations
Abstract:
Automobiles are one of the most significant discoveries of humankind and meant to transport goods and passengers from one place to other. The capability of the vehicle was mainly function of good powertrain and reliability. Above factors along with usability made automobiles successful in the earlier generations. Success of modern-day vehicles not just depend upon good power train or fine aesthetics, but on good levels of NVH (Noise Vibration and Harshness). The advent of electric vehicles has led to a quieter powertrain owing to lesser moving parts in the electric powertrain. Hence, the exterior tire noise becomes prominent. Consequently, the accurate measurement of tire noise is imperative to maintaining optimum noise level of the vehicle. The presented work focuses on the simulation of the measurement of external tire noise using Finite Element Analysis (FEA) approach.
The current procedure of FEA meshing used in the organization incurs a good amount of cost to company as a licensed software is being used and licenses are very limited. There is no standard method of creating acoustic air mesh. The proposed project aims to solve the above-mentioned limitations. A parametric acoustic air mesh will be developed in an open source tool which will be automated. In addition to this, the developed mesh will be cost effective and efficient with respect to time and performance. The parametric air mesh improves the precision of calculation of pass by noise by using a fine mesh near the tire surface and coarser mesh away from the tire surface. The mesh results are compared against various parameters to know the behavior of different mesh designs possible. Maximum mesh size was decided based on the physics of sound wave & was discussed in detailed.