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Zintegrowany proces projektowania i wytwarzania kadłuba jachtu w systemie CAD/CAM/CAE Unigraphics

100%

Rakowski T. , Ziętarski S.

2001

tom nr 5

23-26

Na Wydziale Mechanicznym Energetyki i Lotnictwa Politechniki Warszawskiej prowadzone są prace dotyczące wykorzystania środowiska CAD/CAM/CAE do projektowania, analizy i wytwarzania kadłubów jachtów, zintegrowany system CAD/CAM/CAE Unigraphis udostępnia projektantowi wybów licznych środków konstrukcyjnych, posłużono się jednym z modułów systemu Unigraphis - językiem GRIP; skomplikowany program, pisany we wsadowym języku obiektowym GRIP, jest zestawem komend, które użytkownik zadaje systemowi w trybie interaktywnym.

At the Mechanics, Power and Aviation Department of the Warsaw Technical University works are conducted on using the environment CAD/CAM/CAE for designing, analysing and productiong yacht hulls. The integrated system CAD/CAM/CAE Unigraphics gives the designers a choice from among numerous constructionsl forms. The complied program in the batch language GRIP, i.e. one of the modules of the Unigraphics systems, is a set of commands directed by the user to the system in the interactive mode.

A unified method of identification and optimization of airfoils for aircrafts, turbine and compressor blades

80%

Ziętarski S. , Kachel S. , Kozakiewicz A.

tom Vol. 2, no. 3 (4)

2--15

Topics below are rather undesired, but important, outcome not yet completed research on the aircraft airfoils, turbine and compressor blades, parametric design of airfoils, establishing the relationships based on the results of experiments in a wind tunnel, developing databases for determining the relationships between airfoil parameters and lift and drag coefficients. Reliable database created as a result of the research work allows to simulate the wind tunnel. Very early on, however, was necessary to extend the developed specialized software for a new applications, and it meant the need for generalization of software, e.g. for gas turbine engines, propellers, etc. But after some time it turned out, that in order to achieve the required accuracy, the changes are needed in the underlying assumptions, set decades ago. In addition, coordinate measuring machines and systems, and associated software were not always as accurate as expected. Concepts how to solve it and develop software carrying out these tasks are presented in the article. It is like to withdraw from the old path and look for a new path that will lead to the reliable data base. Processes related to air or gas flow should be similarly defined in all the specialized software applications (e.g. aircrafts and turbine engines). Accuracy (10-9 mm) achieved in virtual measurements within the integrated system can be used to verify the results of CMM and other measuring systems, provided that an appropriate software has been developed.