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The dynamic characteristics of a numerically controlled woodworking center are experimentally studied. Specifically, the amplitude-frequency characteristics, the resonant frequencies in various directions, the dynamic and static rigidity, the degree of damping of vibrations, and the dynamic coefficient of the wood working center are subjected to modal analysis. The behavior of the system components is investigated under the action of external excitation and in end milling.

Abstract-The paper presents the results of physical modeling of the wind pressure. Systematic data are obtained for the pressure coefficient distribution over the sides of the differentsize building models under the airflow conditions. These conditions are provided by an obstacle situated in front of the building model. The obstacle has the same geometrical parameters as the building and is longitudinally and transversely displaced relative to the airflow direction.

Abstract. The paper presents experimental results of a physical simulation and computations of aerodynamic and thermal interference of turbulent flows over two building models. The experimental setup, conditions, and results are described, and the evaluation of obtained results is given in this paper. Conclusions are drawn on the basis of this research.