Abstract For the stability assessment of members and structures according to EN 1993‐1‐1 equivalent member method, geometrical nonlinear calculation with imperfections or GMNIA analysis residual stresses can be used alternatively. The second possibility requires a corresponding model for cross‐section resistance. verification lateral torsional buckling, bow e0 out plane are defined, which lead ...

Geometrical place can be sometimes difficult to find by applying mathematical methods. Evolutionary algorithms deal with a population of solutions. This population (initially random generated) is evolved using genetic operators. Population obtained after a specified number of iterations will contain solutions which (very likely) accomplish the geometrical place problem conditions. Geometrical p...

Unavoidable field-shape imperfections are present in the superconducting magnets of modern hadron colliders, due to mechanical tolerances, persistent currents, design imperfections, coil deformations and iron saturation. The residual multipolar errors, typically of the order of a few units in 10 4 at the usual reference radius of 1 cm, have a detrimental effect on the stability of the particle ...

Acoustic waves around an infinite configuration of identical circular scatterers are considered. Each scatterer is close to a node of a regular lattice: the geometrical configuration is almost periodic. Analytical estimates for the average field in such a random medium are obtained. Introduction Consider waves in a two-dimensional periodic structure, defined by a lattice Λ: each cell in the lat...

In this paper, we investigate the stochastic effects of the microstructure of polysilicon films on the overall response of microelectromechanical systems (MEMS). A device for on-chip testing has been purposely designed so as to maximize, in compliance with the production process, its sensitivity to fluctuations of the microstructural properties; as a side effect, its sensitivity to geometrical ...