System Identification of Vehicle Structures in Crash Loading Environments 900415
A formulation is presented that augments a recently developed method for determining the nonlinear stiffness and damping characteristics of structures subjected to crash-loading environments. The system identification is accomplished using adaptive time domain, constrained minimization techniques. The structural characteristics are idealized with piecewise linear segments and, in the new formulation, the stiffness and damping characteristics are postulated to be functionally dependent. The inertial and material strain rate effects, which constitute the damping characteristics, are modeled as predefined, rate dependent factors applied to the stiffness characteristics. The motivation for this research is to develop lumped mass models of automobiles from acceleration and barrier load data collected during frontal barrier crash testing. The underlying approach in this method is being applied in a global system identification methodology. The application of this methodology towards frontal crashworthiness research projects is discussed.
Citation: Radwan, R. and Hollowell, W., "System Identification of Vehicle Structures in Crash Loading Environments," SAE Technical Paper 900415, 1990, https://doi.org/10.4271/900415. Download Citation
Author(s):
Randa A. Radwan, William T. Hollowell
Affiliated:
Office of Crashworthiness Research, United States Department of Transportation NHTSA
Pages: 16
Event:
International Congress & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Vehicle Crashworthiness and Occupant Protection in Frontal Collisions-SP-0807
Related Topics:
Frontal collisions
Impact tests
Identification
Crashworthiness
Research and development
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