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On the Different Contributions of Flexible Elements to the Structural Noise of Refrigeration Compressors
Technical Paper
2022-01-0983
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
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.
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Ricci, A., Bregant, L., and Albertz, F., "On the Different Contributions of Flexible Elements to the Structural Noise of Refrigeration Compressors," SAE Technical Paper 2022-01-0983, 2022, https://doi.org/10.4271/2022-01-0983.Also In
References
- Eisele , G. , Wolff , K. , Genender , P. , and Schürmann , G.J. Electric Vehicle Sound Design—Just Wishful Thinking? Proceedings of Aachen acoustic colloquium 2010
- Aurich , J. , and Baumgart , R. Comparison and Evaluation of Different a/c Compressor Concepts for Electric Vehicles International Compressor Engineering Conference 1433 1443 2018
- Bennouna , S. , Matharan , T. , and Cherlaux , O. Automotive HVAC Noise Reduction SAE Technical Paper 2018-01-1519 2018 https://doi.org/10.4271/2018-01-1519
- Häussler , M. , Kobus , D. , and Rixen , D.J. Parametric Design Optimization of e-Compressor NVH Using Blocked Forces and Substructuring Mechanical System and Signal Processing 150 2021
- Lim , S.T. , Joo , K.H. , Ahn , H.N. , Park , Y.D. et al. Transfer Characteristics of Vehicle Air Conditioners’ Booming Noise Journal of Mechanical Science and Technology 28 6 2014 2025 2031
- Cerrato , G. Automotive Sound Quality-Powertrain, Road and Wind Noise Sound and Vibration 2009 16 24
- Ricci , A. , Albertz , F. , and Bregant , L. Data-Based Powertrain Mounts Characterization for Driveline Booming Predictions Utilizing Virtual Sensing Proceedings of ISMA2020 2020
- der Seijs , M.V. 2016
- Häussler , M. 2021
- Whitney , D.E. and Rourke , J.M. Mechanical Behavior and Design Equations for Elastomer Shear Pad Remote Center Compliances Journal of Dynamic Systems, Measurements, and Control 108 1986 223 232
- Ciblak , N. and Lipkin , H. Design and Analysis of Remote Center of Compliance Structures Journal of Robotic Systems 20 8 2003 415 427
- Joo , S. , Waki , H. , and Miyazaki , F. On the Mechanics of Elastomer Shear Pads for Remote Center Compliance (RCC) Proceedings of the 1996 IEEE International Conference on Robotics and Automation 291 298 1996
- Fregolent , A. and Sestieri , A. Identification of Rigid Body Inertia Properties from Experimental Data Mechanical System and Signal Processing 10 6 1996 697 709
- Vahid , O. , Khajepour , A. , Ismail , F. , and Urbaniak , C.R. In Situ Identification of Vehicle Engine Inertia Properties Int. J. Vehicle Noise and Vibration 3 1 2007 46 69
- Lennström , D. , Olsson , M. , Wullens , F. , and Nykänen , A. Validation of the Blocked Force Method for Various Boundary Conditions for Automotive Source Characterization Applied Acoustic 102 2016 108 119
- Gras , T. , Aubry , O. , Menon , A. , and Champain , J. Blocked Forces Characterization of an Air-Conditioning Compressor-Application to the Norm ISO-21955 International Noise 2019 Noise Control for a Better Environment 2019
- Plunt , J. Finding and Fixing Vehicle NVH Problems with Transfer Path Analysis Sound and Vibration 2005 12 16
- van der Seijs , M.V. , de Klerk , D. , and Rixen , D.J. General Framework for Transfer Path Analysis: History, Theory and Classification of Techniques Mechanical System and Signal Processing 68 69 2016 217 244
- Cloix , A. , Siwiak , H. , Bouvet , P. , Barillon , F. et al. Characterisation of the Booming Noise Variability in a Vehicle Proceeding of ISMA 2021-USD2012 4513 4524 2012