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Testing of an Automotive Frame to Determine Dynamic Properties
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English
Abstract
The essentially modal behavior of an automotive chassis frame in the 0-30 Hz frequency range is confirmed by investigation of a typical frequency response. A mathematical model is developed for which the parameters are to be obtained directly by analysis of vibration test data. The requirements are determined for the instrumentation system and laboratory test setup necessary to obtain accurate estimates of resonant frequencies, mode shapes, and modal mass and damping properties. The determination and importance of the rigid body properties and the “residual compliance” of truncated modes are discussed. Direct comparisons of predicted frequency responses with the original test data demonstrate the validity of the “test-derived model.”
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Authors
Citation
Flanigan, D., "Testing of an Automotive Frame to Determine Dynamic Properties," SAE Technical Paper 730505, 1973, https://doi.org/10.4271/730505.Also In
References
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- Klosterman A. L. “On the Determination and Use of Modal Representations of Dynamic Characteristics.” University of Cincinnati 1971
- Borowski V. J. Steury R. L. Lubkin J. L. “Finite Element Dynamic Analysis of an Automotive Frame.” Paper 730506 prepared for presentation at SAE Mid-Year Meeting Detroit, Michigan May 1973
- Klosterman A. L. Lemon J. R. “Building Block Approach to Structural Dynamics.” ASME Publication 1969
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- Bosso F. C. “Sine-Test Electrodynamic Vibration Systems Using Digital Control.” Paper presented at Institute of Environmental Sciences Annual Meeting Boston, Massachusetts April 1970