Papers by Keyword: Programming

Abstract: The paper presents results of an improvement to the mathematical system of the two-dimensional equilibrium balance model of the blast furnace process (IMMDP). This improvement was made in terms of transition to three-dimensional modelling of both the furnace space and temperature fields, degrees of reduction, concentration potentials, etc. The model incorporates the azimuthal coordinate dependence of parameters, facilitating enhanced realism in furnace operation by accounting for the circumferential non-uniformity of blast and natural gas distribution over the blast furnace lances. This is particularly pertinent for the assessment of hydrogen gas utilization in support of international climate initiatives. The three-dimensional model facilitates data visualization, enhancing operator clarity. To this end, Python scripts have been developed to visualize both parameter distributions in selected planes and iso-surfaces in three-dimensional space. The data for visualization was obtained by interpolating the results of calculations performed using a two-dimensional model onto a regular grid. Resulting visualization enables the observation of the spatial distribution of the primary parameters of blast furnace operation (gas dynamics, heat exchange, reducing) on the monitor screen, thereby facilitating enhanced comprehension of its operation and optimized control process.

Abstract: This scientific work presents the development of a computer-simulation model for particle filling in three-dimensional space based on molecular dynamics methods. The Lennard-Jones potential was used to simulate interactions between particles, and the equations of motion were integrated using the Velocity Verlet algorithm. The model incorporates periodic boundary conditions (PBC), ensuring accurate representation of an infinite system without boundary effects. The simulation results confirm the system's energy stability: the total energy remains virtually unchanged throughout the simulation, indicating the correctness of numerical integration. Fluctuations in kinetic and potential energies demonstrate normal system dynamics, where energy is redistributed among particles through interactions. An analysis of the spatial distribution of particles revealed that the system remains in a liquid state, with no signs of solid structure formation or particle aggregation. Notably, the developed model enables the simulation of complex physical processes such as dense structure formation, particle transport, and self-packing. The obtained results highlight the efficiency of the molecular dynamics method for analyzing granular and particulate media, as well as for studying the physical properties of multi-particle systems. The model can be utilized to optimize technological processes related to material transportation, packaging, and storage, as well as for research into nanomaterials and composites.

Abstract: We describe the formulation and implementation of the Eilmer4 compressible-flow solver as well as discuss the features of the D programming language that we have found useful for writing scientific software. An example of use is provided to show the features of the user-input scripting and the performance of the main simulation code when run in parallel with block-marching.

Abstract: Numerical control (NC) programming is the critical part for the NC manufacturing system. The NC manufacturing programming is the concentrated reflection of design of component-processing, which reflect directly the productive efficiency of NC manufacturing and the quality of products. This paper suggests that the Multi-agent as the theoretical basis and development platform to research the NC programming based on agent, in order to reach the autonomy of programming unit, the NC programming unit based agent as its the processing object, and self-organization of system. The NC programming based on Multi-agent can achieve the autonomy and functional maturation of each programming sub-unit, and can also achieve the coordination and cooperation among all the dependent units, therefore, the system processes the self-organization ability. One standard process template is created relay on this technology, in order to templatize and intelligentize the process flow and process data of NC manufacturing.

Abstract: The paper presents the works performed by the authors in the field of AS/RS systems design and experimental small scale AS/RS physical model set-up for educational purposes. First part of the paper presents the virtual prototype of the 3D CAD model of the AS/RS system and the developing of the physical model set-up of an experimental small scale AS/RS for educational purposes. The specific hardware for control the AS/RS system and software for programming it are also included in a second part of the paper.

Abstract: The paper presents the works performed by the authors in the field of AS/RS systems design and experimental small scale AS/RS physical model set-up for educational purposes. First part of the paper presents the virtual prototype of the 3D CAD model of the AS/RS system and the developing of the physical model set-up for an experimental small scale AS/RS for educational purposes. The specific hardware for control the AS/RS system and software for programming it are also included in a second part of the paper.

Abstract: This paper introduces motor rotor blanking die design process through specific terms of the process of stamping all. Mould design process is for structural analysis and process analysis of the parts diagram, based on it to determine the technology methods, select the structure of the mould, and make a necessary calculation to determine stock layout and the size of the work part. And choose a suitable punching machine. Finally, choose the parts from the manual of mould.This design also includes the use of AutoCAD software mapping die assembly and major parts map using UG and Pro/E software for 3D solid modeling and animation design simulation process. In addition, the punch and die processing choose WEDM and Programming. So consider the structural design of WEDM of the specific methods to avoid the conflict between design and processing, and guarantee the production reasonable.

Abstract: The metal-forming processes provide a high degree of material utilization, a high working capacity, a high quality of the parts and so on. Taking in account the characteristics of these processes and the current requirements of the market economy, it is necessary to extend the research in the metal-forming field in order to develop new solutions that lead to optimization of the metal-forming technologies and, implicit, to obtain the best quality-price ratio. Also, the software for the simulation, data acquisition, data processing and computer aided design are necessary. This paper presents an application developed ​​using a graphical programming language called LabVIEW, through which, the dimensions of the sheet blank for the flanged parts are calculated based on the specifications of the work drawing, checks the hole flangeability and calculates the force required by the metal-forming processes.

Abstract: Drilling is considered to be one of the mostly used processes for holemaking. Researchers have followed three different approaches for its simulation i.e. analytic, experimental and numerical. Nowadays the direct access of scientists to the Application Programming Interface (API) of several CAD systems led to an increased number of finite element simulations based on CAD 3D models of drilling tools. The present paper uses a CAD system and via its API a kinematic model is created. Different tool parameters and cutting conditions are introduced; a series of 3D solid models for the tool, the workpieces and the undeformed chips are created and the resulted thrust forces are predicted in both the main edges and the chisel edge. The proposed methodology is experimentally verified using Al7075 for the workpiece and HSS for the tool material. In addition, it provides the basis for a series of new applications in other manufacturing processes based on CAD created geometries.

Abstract: This paper presents numerical solutions of straight plane beam structures rested on an elastic (Winkler's) foundation. It is a continuation of our previous work (see Part 1 of this article) focused on practical applications and solutions including nonlinearities in the foundation (i.e. bilateral linear, bilateral linear + cubic, bilateral linear + cubic + quintic approximations and unilateral approximation for dependencies of reaction forces on deflection in the foundation). For solutions of nonlinear problems of mechanics (i.e. differential 4^th-order equations), the Finite Difference Method (i.e. the Central Difference Method) is applied in combination with the Newton (Newton–Raphson) Method. Finally, in one example, linear and nonlinear approaches are solved, evaluated and compared. In some cases, there are evident major differences between the linear and nonlinear solutions.