Vibroacoustic Optimization of Two Cross Stamped Ribs in a Plate

The Noise, Vibration, Harshness (NVH) behavior is one of the predominant factors for market acceptance of vehicles. As to thin parts in the automobiles, the effect result of rib stiffening can significantly alter noise and vibration character of the plate. In this paper, the location and the dimensions of two cross stamped ribs in a plate have been optimized to minimize the radiated noise power under broad-band excitation. The objective of the study is to determine effective design methods for vibroacoustic optimization of the ribs in a plate. The reconstruction of the finite element model and the boundary model in the optimization iterations is one of key factors. Radiated sound power is calculated using a boundary element method, with a finite element solver ANSYS for the solution of the structural vibration.