Structural Dynamics Modeling and Testing of the Department of Energy Tractor/trailer Combination
نویسنده
چکیده
This study presents a combined analytical and experimental effort to characterize and improve the ride qua/;ty of the Department Of Energy fractork?i/er combination. The focus is to augment the experimental test results with the use of a high quality computer model. The discussion includes an overview of the finite element model of the vehicle and experimental modal tesf results. Sysfem identification techniques are employed to update the mathematical model. The validated model is then used to illustrate the benefits of incorporating two major design changes, namely the switch from a separate cab/sleeper configuration to an integrated cab, and the use of a cab suspension system. NOMENCLATURE c Damping g Unit of acceleration k Stiffness rms Root-mean-square L(f) Insertion Loss Factor S(f) Power Spectral Density (PSD) Function FRF Frequency Response Funct ion MAC Modal Assurance Criterion M/F Modal Indicator Function RSI Ride Severity Index
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