Моделирование растяжения стержня в режиме горячей деформации
Investigation is made into the influence of preliminary treatment of aluminium alloys surface for diffusion welding with the aid of laser impulses. It is proved that preliminary laser treatment of the aluminium alloys surface of 1201 and 1151 types for diffusion welding increases welds strength by 30% as compared to the widely used treatment inflow discharge plasma. Besides, laser treatment substantially reduces working hours of the process. Metallographic analysis of the structure of specimens treated in the regime of ″ laser irradiation with subsequent diffusion welding ″ has proved that the weld lacks the narrow sharp boundary zone which is a usual place of initiation and propagation of cracks.Reaxys Database Information |
In coastal seas and straits, the interaction of barotropic tidal currents with the continental shelf, seamounts or sills is often observed to generate large-amplitude, horizontally propagating internal solitary waves. Typically these waves occur in regions of variable bottom topography, with the consequence that they are often modeled by nonlinear evolution equations of the Korteweg-de Vries type with
variable coecients. We shall review how these models are used to describe the propagation, deformation and disintegration of internal solitary waves as they propagate over the continental shelf and slope.
This paper presents a new approach to designing integrated simulation models for large corporations. This approach is based on the use of system-dynamics methods for implementing models of segments of the vertically integrated company taking into account the available direct and feedback links. All models have been designed with the help of power simulation tool - Powersim Studio. In addition, the designed simulation system has been integrated with created genetic algorithm and the corporate data warehouse.
I. The simulation and research into advanced airborne CNS procedures was conducted by the Research Stand for Hardware-in-the-Loop Simulation of Air Traffic Control Systems (KIS UVD) in 2013–2014. II. As part of the research, the following CNS procedures were reviewed: • ITP (In-Trail Procedure) • FIM (Flight-Deck Interval Management) • ACM (Airborne Conflict Management). III. Real-time simulation was conducted with the participation of ATC workstation operator, operator of the advanced cockpit DKS IMA simulator and pilot workstation operator. IV. The research into CNS procedures was conducted using fast-time simulation in automatic mode without operator's participation. V. As part of the work • the cooperation of pilot and ATC during advanced CNS procedures was approbated • the interfaces of CNS procedures for pilot and ATC were tested • performance approbation of CNS procedures in high air traffic conditions with the impact of random factors was held • the quantity characteristics of changes in performance caused by using new CNS procedures were calculated • CNS procedures were compared with standard procedures VI. The results show • Improved performance and prospects using new CNS procedures • KIS UVD stand practicability for simulation and research of airborne and ATC procedures • Need for future research of CNS procedures VII. The future research trends are: • The research of airborne procedures in different air traffic intensity and in conditions where one part of aircrafts is equipped with ADS-B-, ITP-, FIM-, ACM avionics and another part is not equipped • The research of FIM procedure on STAR • The simulation and research of other ADS-B-based procedures (ASIA, SURF) • The research into airborne procedures, connected with weather hazard avoidance • The research into airborne procedures using the real air traffic.
This aim of this paper is the interpretation of the results of mechanical testing of materials to determine their properties under hot deformation. As an example, a simulation of rod stretching in superplasticity mode was considered. Comparing obtained data with the analytical solution was conducted.
This paper presents the simulation tool for study future ATM systems, based on advanced CNS capabilities. Research Stand for hardware-in-the-loop and human-in-the-loop simulation of Air Traffic Management System is the simulation tool, which includes on-board and ground-based components of the air traffic management system. Due to wide range of integrated components the Stand allows studying advanced concepts and technologies of the whole air traffic management system. The Stand allows running simulation in fast-time and real-time modes. Fast time simulation is applied to the long-term experiments. During this simulation all components work in automatic mode. Real-time human-in-the-loop simulation runs to demonstrate functional interaction between ATM components. The main goals of the researches, conducted on the stand, are: • approbation of pilot and air traffic controller interaction; • approbation of new cockpit and ATC system interfaces; • approbation of new airborne functions; • assessment of changes in air traffic characteristics in case of using CNS capabilities .