The aim of the paper is modal condensation of a system which represents bladed disk. These kinds of systems are mainly used in steam turbines what is the topic of the article. The model of the bladed disk is based on decomposition into a disk subsystem and a blading subsystem. The finite element method is used for modeling of the both subsystems. All influences of steady-state rotation are respected as centrifugal forces, gyroscopic effects, centrifugal stiffening of blades and dynamic softening. Blades are modeled by using ID elements and the disk is modeled by using 3D hexahedral elements. Modal condensation is applied to a disk subsystem. Different levels of the condensation are presented and compared on a testing bladed disk. and Obsahuje seznam literatury
Bounded residuated lattice ordered monoids (Rl-monoids) form a class of algebras which contains the class of Heyting algebras, i.e. algebras of the propositional intuitionistic logic, as well as the classes of algebras of important propositional fuzzy logics such as pseudo MV-algebras (or, equivalently, GMV-algebras) and pseudo BL-algebras (and so, particularly, MV-algebras and BL-algebras). Modal operators on Heyting algebras were studied by Macnab (1981), on MV-algebras were studied by Harlenderová and Rachůnek (2006) and on bounded commutative Rl-monoids in our paper which will apear in Math. Slovaca. Now we generalize modal operators to bounded Rl-monoids which need not be commutative and investigate their properties also for further derived algebras.
Modal operators on Heyting algebras were introduced by Macnab. In this paper we introduce analogously modal operators on MV-algebras and study their properties. Moreover, modal operators on certain derived structures are investigated.
To range the satellite, we are using the train of picosecond pulses generated by Nd YAG oscillator / amplifier / second harmonic generator laser system. To establish an optimum discriminatior / timing system, the indoor and the short baseline outdoor calibration experiments were used. The experimental results indicate a limit single shot uncertainty 6cm PMS.