This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Finite Element Dynamic Analysis of an Automotive Frame
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
Using several variations of a basic finite element model, the dynamic displacement response and mode shapes of an automotive frame have been predicted. Small improvements in accuracy were noted when higher-order mass representation and allowance for shear deformation were included in the analysis. Modeling accuracy was significantly increased, however, by including certain effects which are normally ignored. These include an allowance for the less-than-perfect rigidity of siderail-to-crossmember joints; for the torsional behavior of short, open cross-section beams; and for the reduction of flexural inertia in welded, double-channel cross-sections. With the introduction of these factors, the predicted natural frequencies for the first eight flexural modes can be correlated with test results to within 4%. For this level of agreement, the finite element model appears to be sufficiently accurate to be used in design evaluation of frames, prior to prototype construction.
|Technical Paper||Testing of an Automotive Frame to Determine Dynamic Properties|
|Technical Paper||A Modal Synthesis Technique for Determining Dynamic Properties for a Structure for Mass and Stiffness Changes|
CitationBorowski, V., Steury, R., and Lubkin, J., "Finite Element Dynamic Analysis of an Automotive Frame," SAE Technical Paper 730506, 1973, https://doi.org/10.4271/730506.
- Flanigan D. L. “Testing of an Automotive Frame to Determine Dynamic Properties.” Paper 730505 SAE Mid-Year Meeting Detroit May 1973
- Archer J. S. “Consistent Mass Matrix for Distributed Mass Systems.” Journal of the Structural Division Proceedings of the American Society of Civil Engineers 89 August 1963 161 178
- Oden J. T. “Mechanics of Elastic Structures.” McGraw-Hill 1967