Technical Transactions iss. 7. Mechanics iss. 2-M

Technical Transactions iss. 7. Mechanics iss. 2-M

Type: Collection of magazine numbers
Release date

Collection items (35)


The idea of database for recording intermediate states of rotary parts for CAPP use

Habel, Jacek
Article
2015
The paper presents a developed database for recording intermediate states of a workpiece. This solution can be used for automation of the calculation process, intermediate states and blank design generation for wide sets of parts. The calculation formulas, decision parameters and definition of intermediate states are also presented in this paper. The results from the developed SQL queries are attached. The presented idea and implemented database will reduce the time of design of a blank for rotary and axisymmetric parts in machining processes.

Integration of the Rural Roads database in Thailand with the parallel computing environment

Sanitin, Dittapon, Masui, Hiroshi
Article
2015
We present a solution to integrate the database of the Department of Rural Roads (DRR) in Thailand and to utilize the date on the environment of the parallel computing. We define and classify the usage of the data according to the level of the collaboration for different sources. For the user interface of the integration, we provide a web-based environment with the technique of the HTML5.

Computer-aided machine design with regard to new technologies and materials

Migus, Marcin, Osowski, Karol, Olszak, Artur, Kęsy, Andrzej, Kęsy, Zbigniew
Article
2015
The aim of the paper is to present the issue of using computer-aided methods as well as 3D printing technologies and not typical materials connected with it. Selected problems that can occur while applying computer-aided methods and their solutions have also been described.

Modeling of gas flow through valve (CRV)

Duda, Piotr, Duda, Roman
Article
2015
The aim of this work is to calculate the effective area of a compressor recirculation valve. Analytical solution and numerical modeling for compressible flow through a valve will be presented. Critical parameters of flow will be determined. Numerical modeling will be performed using ANSYS FLUENT. The results of the numerical solution will be compared with the analytical solutions.

Computer driven automatic control of the hybrid two stage refrigeration cycle

Cyklis, Piotr, Duda, Roman
Article
2015
In the paper the method of automatic control of the two stage hybrid sorption-compression refrigeration system for different ambient conditions is presented. The main advantages of the system are its environmental friendly working fluids and waste or renewable low temperature heat source utilization. The control algorithm is designed for operation in four seasons’ conditions. During cold seasons the heat from the second stage condenser, as waste heat, may be used to increase the temperature of the heat pump source. The system is composed of dependent subsystems with individual controls, however it is controlled by the computer program as master control. The issues related to the optimization of operation of the refrigeration system, taking into account the maximum usage of available renewable or waste heat sources, are discussed in the paper.

Numerical modelling of the optical demultiplexer photonic structures

Młynarczyk, Przemysław, Dziatkiewicz, Grzegorz
Article
2015
Photonic structures and their application are one of the most intensively studied areas of modern optics. They are used in devices such as blue lasers, optical fibres or optical add-drop multiplexers. The paper describes the possibility of designing the photonic structure of the optical demultiplexer using the application written by the authors.

Control system of laboratory stand for gearbox and coupling testing

Spotowski, Tomasz, Osowski, Karol, Kęsy, Zbigniew
Article
2015
The scheme control system of a laboratory stand for gearbox and coupling testing, capable of fulfilling many miscellaneous requirements has been described in the paper. The innovative solution, as well as the benefits of the application, based on the Program Logic Controller, connected with electrical motor drives and a computer measurement system, have been described and depicted. Special features of the suggested solution, such as flexibility and ability to develop or adjust for another application, have been characterized.

FMEA analysis of a hydraulic cylinder using artifical neural network

Fabiś-Domagała, Joanna
Article
2015
This paper presents Failure Mode and Effects Analysis (FMEA) on the hydraulic cylinder using matrix analysis and artificial neural network. Functions for each cylinder components were identified. Also relationships between pairs for interacting components and their potential failures where identified. Training and testing of an artificial neural network was conducted in MATLAB software environment.

Modeling of heat flow through multilayer internal supports of cryogenic vessels

Czyżycki, Wojciech
Article
2015
The article presents the issue of heat flow through internal supports of double-walled cryogenic vessels. The influence of the thermal resistance at the contact plane between supports and vessel materials is discussed. A simulation of heat flow through the support multilayer made of plastic is presented. The simulation takes into account the influence of temperature and local contact pressure on the thermal resistance.

Reducing the number of runs in experimental research using smart designs of experiment

Skowronek, Andrzej
Article
2015
This paper presents the results of a computer simulation, performed to check how the number of smart designs of experiment units affects the quality of information to be obtained in experimental research conducted on the basis of the analyzed designs. In the simulation, a real research object was replaced by a special testing function whose values were compared to the values predicted by the neural networks trained with the use of data sets based on smart designs of experiments containing various numbers of units.