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Event Type:

Applied Mathematics and Computation Seminar

Date/Time:

Friday, April 8, 2011 - 05:00

Location:

GLK 113

Event Link:

Guest Speaker:

Institution:

OSU Structural Engineering

Abstract:

Response sensitivity analysis is required for gradient-based

structural engineering applications such as optimziation, reliability, and

system identification as well as for assessing epistemic and aleatory

uncertainty in simulating structural response. Traditionally, the finite

difference method (FDM) has been employed to compute structural response

sensitivity; however, the FDM is computationally inefficient and prone to

round off error. The growing application of the direct differentiation

method (DDM) to structural response simulation allows sensitivity to be

computed efficiently and accurately as the simulation proceeds rather than

by repeated re-analysis with perturbed parameters. Example applications

demonstrate the efficiency of the DDM over FDM in nonlinear finite element

reliability analysis of frame structures.

Abstract Link: