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Abstruct This paper presents a program for a multidisciplinary optimization and identiflcation problem of transient and nonlinear model of a large scale aerospace vehicle structure. This program constructs the global matrix of dynamic system which is constructed in the time direction with p-version flnite element method (pFEM), and the basic matrix for each pFEM node in time direction is described with the sparse matrix like a static flnite element problem. The algorithm which is used in this program does not need the Hessian matrix of the objective function, and it requires less memory and computational cost, and is also suited for parallel computing. This program was integrated as one of solver module of the multidisciplinary analysis system CUMuLOUS which is under development by Japan Aerospace Exploration Agency (JAXA) / Aerospace Research and Development Directorate (ARD).

An Optimization Code for Nonlinear Transient Problems of a Large Scale Multidisciplinary Mathematical Model