국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Nonlinear Reduced-Order Simulation Using An Experimentally Guided Modal Basis
저자	Rizzi, Stephen A.;; Przekop, Adam
Keyword	ACCELERATION MEASUREMENT;; BOUNDARY CONDITIONS;; DECOMPOSITION;; DEGREES OF FREEDOM;; DISPLACEMENT;; DYNAMIC RESPONSE;; FINITE ELEMENT METHOD;; MATHEMATICAL MODELS;; NONLINEARITY;; ORTHOGONALITY;; RESONANT FREQUENCIES;; SIMULATION;; SYSTEM IDENTIFICATION;; VISCOUS DAMPING
URL	http://hdl.handle.net/2060/20120007660
보고서번호	AIAA-2012-1971
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A procedure is developed for using nonlinear experimental response data to guide the modal basis selection in a nonlinear reduced-order simulation. The procedure entails using nonlinear acceleration response data to first identify proper orthogonal modes. Special consideration is given to cases in which some of the desired response data is unavailable. Bases consisting of linear normal modes are then selected to best represent the experimentally determined transverse proper orthogonal modes and either experimentally determined inplane proper orthogonal modes or the special case of numerically computed in-plane companions. The bases are subsequently used in nonlinear modal reduction and dynamic response simulations. The experimental data used in this work is simulated to allow some practical considerations, such as the availability of in-plane response data and non-idealized test conditions, to be explored. Comparisons of the nonlinear reduced-order simulations are made with the surrogate experimental data to demonstrate the effectiveness of the approach.