The article is aimed at the statistical and sensitivity analysis of the ultimate limit state of steel frames. Load–carrying capacity is calculated for steel plane frames with columns loaded in tesion or compression. The Monte Carlo based procedures are used for statistical analysis and for computing the full set of first order and second order sensitivity indices of the model. System imperfecti...

This investigation on the dynamic behaviour of ball bearings was motivated by the demand for silent bearings in noise-sensitive applications, especially in the household appliance and automotive industry. The present investigations are intended to provide a clear understanding of the role of the bearing in the application with respect to its design, its quality and the way in which it is mounte...

Numerical method of identification for small circular openings in the domain of integration of an elliptic equation is presented. The method combines the asymptotic analysis of PDE’s with an application of neural networks. The asymptotic analysis is performed in singularly perturbed geometrical domains with the imperfections in form of small voids and results in the form of the so-called topolo...

A unified and comprehensive treatment of shape sensitivity that includes variations in the nodal coordinates, member cross-section properties, and global shape parameters of inelastic frame structures is presented. A novelty is the consideration of geometric uncertainty in both the displacementand force-based finite element formulations of nonlinear beam-column behavior. The shape sensitivity e...

In this work, we provide a numerical/experimental investigation of the micromechanics-induced scattered response of a polysilicon on-chip MEMS testing device, whose moving structure is constituted by a slender cantilever supporting a massive perforated plate. The geometry of the cantilever was specifically designed to emphasize the micromechanical effects, in compliance with the process constra...

Considering the geometric nonlinearity and imperfection of stiffened cylinders, generalized similitude conditions scaling laws for axial compression post-buckling are established by applying transformation to total energy structure. The similarity cylinders is numerically analyzed, scale laws, through innovative application stiffness formulas deformation factor. Based on three type geometrical ...

Machine vision can greatly benefit from the development of accurate reflectance models. There are two approaches to the study of reflection: physical and geometrical optics. While geometrical models may be construed as mere approximations to physical models, they possess simpler mathematical forms that often render them more usable than physical models. However, geometrical models are applicabl...

The effect of (1) initial imperfections and (2) material degradation reinforced concrete columns on their safety in emergency situations was investigated. research limited to low- medium-flexibility columns. Numerical modeling proven regulatory methods analysis were applied determine the ultimate bearing capacity, taking into account supplementary dynamic loading by a longitudinal force bending...