Input estimation from measured structural response

Conference · Wed Dec 31 23:00:00 EST 2008

DOI:https://doi.org/10.1007/978-1-4419-9834-7_60· OSTI ID:971283

Harvey, Dustin ^[1]; Cross, Elizabeth ^[1]; Silva, Ramon A ^[1]; Farrar, Charles R ^[1]; Bement, Matt ^[1]

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1. Los Alamos National Laboratory

This report will focus on the estimation of unmeasured dynamic inputs to a structure given a numerical model of the structure and measured response acquired at discrete locations. While the estimation of inputs has not received as much attention historically as state estimation, there are many applications where an improved understanding of the immeasurable input to a structure is vital (e.g. validating temporally varying and spatially-varying load models for large structures such as buildings and ships). In this paper, the introduction contains a brief summary of previous input estimation studies. Next, an adjoint-based optimization method is used to estimate dynamic inputs to two experimental structures. The technique is evaluated in simulation and with experimental data both on a cantilever beam and on a three-story frame structure. The performance and limitations of the adjoint-based input estimation technique are discussed.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 971283
• Report Number(s): LA-UR-09-06385; LA-UR-09-6385
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
OPTIMIZATION
PERFORMANCE
SIMULATION