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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.15 No.2
- 발행연도
- 2015.1
- 수록면
- 409 - 424 (16page)
이용수
초록· 키워드
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Structural nonlinearity is a common phenomenon encountered in engineering structures under severe dynamic loading. It is necessary to localize and identify structural nonlinearities using structural dynamic measurements for damage detection and performance evaluation of structures. However, identification of nonlinear structural systems is a difficult task, especially when proper mathematical models for structural nonlinear behaviors are not available. In prior studies on nonparametric identification of nonlinear structures, the locations of structural nonlinearities are usually assumed known and all structural responses are measured. In this paper, an identification algorithm is proposed for locating and identifying model-free structural nonlinearities and systems using incomplete measurements of structural responses. First, equivalent linear structural systems are established and identified by the extended Kalman filter (EKF). The locations of structural nonlinearities are identified. Then, the model-free structural nonlinear restoring forces are approximated by power series polynomial models. The unscented Kalman filter (UKF) is utilized to identify structural nonlinear restoring forces and structural systems. Both numerical simulation examples and experimental test of a multi-story shear building with a MR damper are used to validate the proposed algorithm.
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참고문헌 (31)
참고문헌 신청
Al-Hadid, M.A. / 1992 / Estimation of mass and modal mass in the identification of non-linear single and multi degree of freedom systems using the force-state mapping approach / Mech. Syst. Signal Pr 6(4):383~401
Crawley, E.F. / 1986 / Identification of nonlinear structural elements by force-state mapping / AIAA J 24(1):155~162
Dahl, P. R. / 1976 / Solid friction damping of mechanical vibrations / AIAA J 14(12):1675~1682
M. Q. Feng / 2009 / Application of structural health monitoring in civil infrastructure / Smart Structures and Systems, An International Journal 5(4):469~482
He, J. / 2012 / Restoring force and dynamic loadings identification for a nonlinear chain-like structure with partially unknown excitations / Nonlinear Dynam 69(1-2):231~245
Crawley, E.F. / 1986 / Identification of nonlinear structural elements by force-state mapping / AIAA J 24(1):155~162
Dahl, P. R. / 1976 / Solid friction damping of mechanical vibrations / AIAA J 14(12):1675~1682
M. Q. Feng / 2009 / Application of structural health monitoring in civil infrastructure / Smart Structures and Systems, An International Journal 5(4):469~482
He, J. / 2012 / Restoring force and dynamic loadings identification for a nonlinear chain-like structure with partially unknown excitations / Nonlinear Dynam 69(1-2):231~245
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