On the Different Contributions of Flexible Elements to the Structural Noise of Refrigeration Compressors Università degli Studi di Trieste, BMW AG

Format:

Book

Conference/Event

Author/Creator:

Ricci, Andrea, author.

Contributor:

Albertz, Frank

Bregant, Luigi

Conference Name:

12th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference (2022-06-22 : Graz, Austria)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2022

Summary:

Air conditioning acoustics have become of paramount importance in electric vehicles, where noise from electromechanical components is no longer masked by the presence of the internal combustion engine. In a car HVAC systems, the coolant compressor is one of the most important sources in terms of vibration and noise generation. The paper, the generated structural noise is studied in detail on a prototype installation, and the noise transmission and propagation mechanisms are analyzed and discussed. Through "in situ" measurements and virtual point transformation, the rotor unbalance forces and torque acting within the component are identified. The dynamic properties of the rubber mounts, installed between the compressor and its support, are identified thanks to matrix inversion methods. To assess the quality of the proposed procedure, the synthesized sound pressure level is compared with experimental SPL measurements in different operational conditions. The contributions to the structure borne noise of the installed hoses and mounts are evaluated, ranked and commented

Notes:

Vendor supplied data

Publisher Number:

2022-01-0983

Access Restriction:

Restricted for use by site license