Banca de QUALIFICAÇÃO: Rodrigo Vieira Fonseca

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : Rodrigo Vieira Fonseca
DATA : 30/10/2019
HORA: 14:00
LOCAL: Prédio PPGEC
TÍTULO:

SOFTWARE fOR AUTOMATIC MODAL UPDATING OF TRIDIMENSIONAL FRAME STRUCTURES

PALAVRAS-CHAVES:

Model Updating, Single value decomposition, Finite element method

PÁGINAS: 40
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Estruturas
ESPECIALIDADE: Mecânica das Estruturas
RESUMO:

The demand for more accurate numerical simulations of civil structures has grown in the same order as buildings become increasingly slender and flexible. In this scenario, software based on solving mathematical methods is increasingly used. These software’s allow to obtain the structure response in front of a great variety of actions and constitutive models of the materials, being the finite element method (FEM) the most used. In this software’s there is a difficulty in correctly simulating the bindings nonlinearities and specific characteristics of the materials. The connections between soil structure, various types of connections and material failures generates differences in stiffness between numerical model and the actual structure, mainly due to the difficulty in correctly predicting the mechanical properties of the soil and materials that make up structures. To get around these difficulties, there are model updating methods, which consists of changing in software’s structural parameters (stiffness, inertia, mass, section area) of certain points of the model. Modification can be done several times or once, resulting in a response that physical characteristics of the actual structure and the model are very close. However, when the process is done manually, it depends on the analyst's experience and thus can be very subjective, or being very time consuming, making it unfeasible in some models. In this context, this paper presents the development of a software based on the MEF, which performs automatic updating of models, taking as reference the modal parameters of the structure. After development, the software will be tested by performing automatic calibration of metal beams, whose modal parameters were extracted by experimental tests. Calibration will be done by automatic and iterative change in stiffness, moment of inertia of certain points of the modeled structure. By the technique of single value decomposition, optimal values of numerical natural frequencies will be obtained. The program is expected to be able to perform automatic calibration quickly and accurately.

MEMBROS DA BANCA:
Presidente - CLAUDIO JOSE MARTINS
Interna - RENATA GOMES LANNA DA SILVA
Externo à Instituição - VINÍCIUS NICCHIO ALVES