Browse Publications Technical Papers 2004-01-3352
2004-11-16

Applications of the Statistical Energy Analysis to Vibro-Acoustic Modeling of Vehicles 2004-01-3352

In recent years, SEA has been recognized as an important tool to model the vibro-acoustic behavior of vehicles in mid and high frequencies. Through SEA it is possible to develop vehicle models early in the design stage, reducing the risk of future noise problems and allowing the optimization of noise control treatments. Moreover, at the final design stages, a SEA model can be use to evaluate changes at the project, reducing costs with experiments. In a SEA model, the structure under study is divided in subsystems. The capacity of each subsystem of storekeeping, dissipating and transmitting energy is described by three parameters: modal density, loss factor and coupling loss factor. The noise and vibration sources are include in the model as power inputs to subsystem and, based on an equilibrium power balance, it is possible to calculate the energy of each subsystem. The results obtained by SEA models should be interpreted as average values in time, in the frequency band, in space and at an ensemble of random structures. In this work, the applications of SEA at the vibro-acoustic modeling of vehicles are discussed. The details that should be observed when defining the structural and acoustic subsystem are pointed out. The main methods for the determinations of the SEA parameters are introduced. Special emphasis is given to the calculation of the power inputs of the main noise and vibration sources in a vehicle. Finally, some practical applications of SEA at the automotive industry are presented and discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Improved Life for Krypton-Filled Brake Bulbs

2005-01-1452

View Details

TECHNICAL PAPER

Vehicle Mid-Frequency Response Using the Superelement Component Dynamic Synthesis Technique

2015-01-1320

View Details

TECHNICAL PAPER

A General Optimization Approach for Minimizing Acoustic Power Using Finite Elements

930198

View Details

X