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Simulation of Vibrating Vehicle Structures as Part of the Design Process of Engine Mount Systems and Vibration Absorbers
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Event:
1995 SAE Brasil
Language:
English
Abstract
A vehicle's structure vibration leads to perceivable accelerations at the steering wheel, the seat rails and the floor panels; additionally, these vibrations cause structure borne noise which contributes to the sound pressure level in the passenger's compartment. The perceivable structure accelerations and the sound pressure level constitute criteria for evaluating a vehicle's noise and vibration behavior. Consequently, improving the noise and vibration behavior is tantamount to reducing the vibration amplitudes of the vehicle structure.
The operating engine causes engine mount forces which provoke the structure vibration. After the engine mount forces are calculated, the structure vibrations are simulated with a vehicle structure model described by transfer functions that relate the engine mount forces to the accelerations of all selected structure points where the vibration is supposed to be analyzed. The transfer functions can be measured in a vehicle or derived from a Finite Element model of the structure. Based on transfer functions, the seat rail accelerations are simulated with and without a vibration absorber attached to the vehicle structure.
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Authors
Citation
Müller, M., Siebler, T., and Gärtner, H., "Simulation of Vibrating Vehicle Structures as Part of the Design Process of Engine Mount Systems and Vibration Absorbers," SAE Technical Paper 952211, 1995, https://doi.org/10.4271/952211.Also In
References
- van der Linden P.J.G. Fun J.K. “Using Mechanical-Acoustic Reciprocity for Diagnosis of Structure Borne Sound in Vehicles” SAE-paper 931340 1993
- Müller M. Hornberger K. “The Design of Engine Mount Systems and their Mount Elements Using Modern Simulation Techniques” Essen, Germany May 2-3 1995
- Beitz W. Küttner K.-H. “Dubbel: Pocketbook of Mechanical Engineering” 16th Springer Verlag Berlin, New York 1987
- Müller M. Siebler T. W. ‘Methods for the Reduction of Noise and Vibration in Vehicles Using an Appropriate Engine Mount System” SAE-paper 942414 E 1994
- Weltin U. Müller M. “Conception, Design, and Experiment Based Optimization of Vehicle Engine Mountings” Soundengineering - developments in vehicle acoustics tailored to customer needs Vo Quang-Hue Verlag Renningen- Malmsheim, Germany 3-8169-1177-3 1994
- Müller M. Weltin U. “Vibration Compensation with Active Engine Mounts” VDI Fortschrittsberichte, 14th Internationales Wiener Motorensymposium Dasseldorf, Germany May 6-7 1993
- Müller M. Weltin U. Law D. Roberts M.M. Siebler T.W. The Effect of Engine Mounts on the Noise and Vibration Behavior of Vehicles” SAE-paper 940607 1994