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Numerical Simulation and Active Noise Control of Vehicle Interior Acoustics

Sorosiak, Eric J.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212160316

Abstract Details

2008, MS, University of Cincinnati, Engineering : Mechanical Engineering.
Vehicle noise, vibration and harshness (NVH) problems can be analyzed using numerical methods such as finite element and boundary element analysis approaches, which are generally complex and time consuming. In order to speed the analysis and reduce the calculation burden, an enhanced, simplified numerical acoustic cavity formulation is developed, used and verified for the analysis of several vehicle NVH problems. The simplified model can incorporate multiple acoustic cavities joined by flexible panels to represent adjacent vehicle compartments. Several models are created with different cavity and panel configurations, and transfer functions predicted by these models are compared with corresponding transfer functions from measured vehicle data. The comparison results show that the developed simplified model provides reasonable accuracy for the analysis and simulation of vehicle compartment acoustics. While the initial goal of the simplified model was to develop a tool to observe general trends and effects associated with perturbations in the dimensions and configurations of joined vehicle compartments, results show sufficient accuracy for the model to be used for more detailed analyses as well. Additionally, an active noise control (ANC) system is proposed for tuning vehicle interior response, whereas traditional vehicle ANC is intended to suppress unwanted vehicle response. The proposed concept is adapted from the basic filtered-x least mean squares (FXLMS) algorithm and is studied numerically, utilizing simulated control input speakers inside the passenger compartment. An optimal configuration of these speakers is determined in order to maximize the effectiveness of the ANC system and then the proposed approach is demonstrated using a powertrain noise example in which individual engine firing orders are targeted for shaping either by reducing or enhancing the spectral content.
Teik Lim, PhD (Committee Chair)
Randall Allemang, PhD (Committee Member)
Jay Kim, PhD (Committee Member)
41 p.
Acoustics; Engineering; Mechanical Engineering
vehicle; interior; passenger compartment; cabin; cavity; modeling; active noise control; FXLMS; acoustics

Recommended Citations

Citations

  • Sorosiak, E. J. (2008). Numerical Simulation and Active Noise Control of Vehicle Interior Acoustics [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212160316

    APA Style (7th edition)

  • Sorosiak, Eric. Numerical Simulation and Active Noise Control of Vehicle Interior Acoustics. 2008. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212160316.

    MLA Style (8th edition)

  • Sorosiak, Eric. "Numerical Simulation and Active Noise Control of Vehicle Interior Acoustics." Master's thesis, University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212160316

    Chicago Manual of Style (17th edition)

ucin1212160316
727
© 2008, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.