ONE-TO-ONE NONLINEAR TRANSFORMATION OF THE SPACE WITH IDENTITY PLANE

A. D. Malyi, T. V. Ulchenko, A. S. Shcherbak, Yu. Ya. Popudniak, T. V. Starosolskaya

Abstract


Purpose. Study of geometric transformations. We will consider the so-called point transformations of space. Methodology. The most important are one-to-one transformations. They allow exploring and studying the properties of the transformed object using the properties of the original object (line, surface and figure) and the properties of the transformation. Cremona transformations occupy a special place in the set of one-to-one nonlinear transformations. Construction of one-parameter (stratifiable) transformations is carried out as one-parameter set of plane transformations, both linear and non-linear ones. The plane, in which the specific transformation is prescribed, moves in space by a certain law forming a one-parameter set of planes. The set of such plane transformations makes up the space transformation. Findings. The designed graphics algorithms and the established transformation equations allow building the visual images of transformed surfaces and conducting their research by analytical geometry methods. Originality. By completing elementary algebraic transformations of this equation, we obtain the cissoids equation. If the plane  is continuously moved parallel to itself, it results in occurrence of surface, whose carcass will be the set of cissoids and the set of front-projecting lines. Practical value. The considered set of stratifiable algebraic transformations gives an effective means for exploring new curves and surfaces obtained by transforming the known algebraic lines and surfaces. These graphic algorithms allow graphically depicting the transformed lines and surfaces. The considered procedure of drawing up analytical formulas of specific transformations allows us to study the transformed surfaces and lines using the methods of analytic geometry. The above transformations can be of arbitrary high order, which is especially important during the design of complex technical surfaces such as aircraft components, parts of water and gas turbines, supports of the structures subject to strong flow of liquid, etc. Space modelling issues, including the building of graphic plane models of space, are relevant both in theoretical terms and in terms of application of the non-linear surfaces investigated on their basis for constructing the technical forms of parts and aggregates of construction machine movable elements, the middle surfaces of shells, the surfaces of turbulent blade, etc.


Keywords


space modelling; quasi-linear model; space transformation; non-linear surface; graphic design; axiomatic design

References


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DOI: https://doi.org/10.15802/stp2016/74768

 

Cited-by:

1. DESIGNING OF DEVELOPED SURFACES OF COMPLEX PARTS
S. S. Tyshchenko, A. V. Krasniuk, T. V. Ulchenko, A. S. Shcherbak
Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport  Issue: 2(68)  First page: 148  Year: 2017  
doi: 10.15802/stp2017/100227



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