Abstract
The paper deals with methods of equivalence of boundary conditions in finite element models that are based on finite element model updating technique. The proposed methods are based on the determination of the stiffness parameters in the section plate or region, where the boundary condition or the removed part of the model is replaced by the bushing connector. Two methods for determining its elastic properties are described. In the first case, the stiffness coefficients are determined by a series of static finite element analyses that are used to obtain the response of the removed part to the six basic types of loads. The second method is a combination of experimental and numerical approaches. The natural frequencies obtained by the measurement are used in finite element (FE) optimization, in which the response of the model is tuned by changing the stiffness coefficients of the bushing. Both methods provide a good estimate of the stiffness at the region where the model is replaced by an equivalent boundary condition. This increases the accuracy of the numerical model and also saves computational time and capacity due to element reduction.
Highlights
Faculty of Mechanical Engineering, Technical University of Košice, 042 00 Košice, Slovakia; Faculty of Mechanical Engineering, Technical University of Ostrava, 708 00 Ostrava, Czech Republic; Abstract: The paper deals with methods of equivalence of boundary conditions in finite element models that are based on finite element model updating technique
Their basis is the replacement of boundary condition, bond, constraint, were described
Their basis is the replacement of boundary condition, bond, constraint, or a part of the model by bushing or elastic connectors with corresponding stiffness
Summary
Faculty of Mechanical Engineering, Technical University of Košice, 042 00 Košice, Slovakia; Faculty of Mechanical Engineering, Technical University of Ostrava, 708 00 Ostrava, Czech Republic; Abstract: The paper deals with methods of equivalence of boundary conditions in finite element models that are based on finite element model updating technique. The natural frequencies obtained by the measurement are used in finite element (FE) optimization, in which the response of the model is tuned by changing the stiffness coefficients of the bushing. Both methods provide a good estimate of the stiffness at the region where the model is replaced by an equivalent boundary condition. In order to improve the FE model, it is possible to perform a sensitivity analysis or an optimization analysis, where the response is adjusted by changing the input parameters or identifying them This procedure is known as finite element model updating. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
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