Identyfikacja obciążenia uplastyczniającego w ramie

• Autorzy: Miller B. , Ziemiański L.
• Konferencja: Dynamika Konstrukcji / Sympozjum (XII ; 28-30 września 2005 ; Rzeszów-Bystre, Polska)
• Języki publikacji: PL

Abstrakty

EN

Possible yielding of the cross-section of a structure, which may arise as a result of external actions or the (micro)defects, might significantly decrease the safety margin of the considered structure. Since the cross-section yielding affects the structure stiffness, the dynamic characteristics (eigenvalues and eigenvectors) might be significantly different then the ones of the original structure. The measurement of the changes of the dynamic parameters may provide the information necessary to identify the load causing the yielding of the cross-section and further the yielding index (which may be calculated when the load causing the yielding is know) enables the evaluation of the structure safety margin. This paper presents some new results of Artificial Neural Networks (ANN) [2] application in the identification of the load causing partial yielding of simple frames.

Słowa kluczowe

PL

rama; obciążenie; uplastycznienie; przekrój poprzeczny; sztuczne sieci neuronowe

EN

frame; load; plasticitization; cross-section; transverse section; artificial neural networks

• Wydawca: Oficyna Wydawnicza Politechniki Rzeszowskiej
• Czasopismo: Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
• Rocznik: 2005
• Tom: z. 65 [222]
• Strony: 297--302
• Opis fizyczny: Bibliogr. 8 poz., tab., rys., wykr.

Twórcy

autor

Miller B.

• Politechnika Rzeszowska, Katedra Mechaniki Konstrukcji

autor

Ziemiański L.

• Politechnika Rzeszowska, Katedra Mechaniki Konstrukcji

Bibliografia

• [1] Chen W.F., Han D.J., Plasticity for structural engineers. Springer-Verlag, New York/Berlin/Heidelberg, 1988.
• [2] Haykin S., Neural networks. A comprehensive foundation, Prentice Hall, Upper Saddle River, 2 wydanie, 1999.
• [3] Miller B., Piątkowski G., Ziemiański L., Beam Yielding Load Identification by Neural Networks, Computer Assisted Mechanics & Engineering Sciences 3-4(6): 449-467, 1999.
• [4] Miller B., Ziemiański L., The identification of the load causing partial yielding in a beam on the basis of the dynamic characteristics, CMM-2005, Częstochowa, 2005.
• [5] Miller B., Ziemiański L., The Application of eigenvalues and eigenforms in the assessment of the yielding state of a beam, Proceedings NNSC, Kraków, 2005.
• [6] Moran M.M., Change of dynamic characteristics due to plastification. Computational Plasticity. Fundamentals and Applications, Pineridge Press - CIMNE, Swansea - Barcelona, 1967-1997, 1995.
• [7] Stavroulakis G.E., Bolzon G., Waszczyszyn Z., Ziemiański L., Inverse Analysis, in Comprehensive Structural Integrity, vol. 3: Numerical and Computational Methods, Elsevier, 685-718, 2003.
• [8] Waszczyszyn Z., Ziemiański L., Neural Networks in Mechanics of Structures and Materials - New Results and Prospects of Applications w Computers&Structures 79:2261-2276, 2001.