Event Detail

Event Type: 
Applied Mathematics and Computation Seminar
Friday, April 8, 2011 - 05:00
GLK 113

Speaker Info

OSU Structural Engineering

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.