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Virtual Vibration Analysis of Automotive Air Conditioning Units With Rotating Blowers
Technical Paper
2007-04-0048
Sector:
Language:
English
Abstract
A low level of noise and vibration is an increasingly important criterion for customer's recognition of the quality of their cars. Beside other components, particular attention is therefore being paid to air conditioning units regarding their vibration design. To facilitate virtual design assessment in early development phases, BEHR has developed a complete dynamic calculation methodology for air conditioning units under typical excitations, particularly that of the rotating blowers of the unit itself. A crucial point in the physical model approach is the consideration of terms for the gyroscopic motion of the rotating parts. With special solvers the resulting equations can be solved. The method was successfully validated using modal correlation and comparison with the operational vibration analysis.