Abstract
The paper is devoted to the analysis of numerical modeling data exact as it possible to determine aero-hydrodynamic loads from high-speed trains on different constructions and objects of transport infrastructure. These investigations include pressure and flow velocities distributions definition on the surfaces for specified objects and also with special investigation of amplitude-frequency characteristics for the individual construction elements. According to proposed special verification methodical approach it confirms efficiency and correctness of the results obtained by authors. This includes too the application of the main original combined numerical approach as for calculation process so as for effective verification of these results with support of special analysis in case of different proposed verification schemes.
Highlights
This work is step forward to creation and application of mathematical models for the most dangerous oscillations excitation mechanisms for different constructions in liquid or air flow, as well as to creation of efficient computational methods for description of these models and processes
The paper contains some results of analysis for numerical modeling data, exact as it possible to determine aerodynamic loads in all these cases with constructions and objects of transport (Fig. 1)
Numerical investigation method of hydrodynamic forces arising from separated flow, and construction oscillations excited by these forces, were worked out by authors. For this task decision authors proposed numerical methodic (Fig. 2) of aero-hydrodynamic loads modeling from high-speed trains (ANSYS-CFX) –2D-3D task decisions in combination with some specially chosen vortices methods, such as elaborated in Institute for Machine Science of the Russian Academy of Sciences Modernized Method of Discrete Vortices (MMDV) – for decision of 2D – tasks especially in this direction [4, 5]
Summary
This work is step forward to creation and application of mathematical models for the most dangerous oscillations excitation mechanisms for different constructions in liquid or air flow, as well as to creation of efficient computational methods for description of these models and processes. The paper contains some results of analysis for numerical modeling data, exact as it possible to determine aerodynamic loads in all these cases with constructions and objects of transport (Fig. 1) It includes definition of pressure and flow velocities distributions on the surfaces of specified objects and with special investigation of amplitude-frequency characteristics for the individual construction elements. Numerical investigation method of hydrodynamic forces arising from separated flow, and construction oscillations excited by these forces, were worked out by authors For this task decision authors proposed numerical methodic (Fig. 2) of aero-hydrodynamic loads modeling from high-speed trains (ANSYS-CFX) –2D-3D task decisions in combination with some specially chosen vortices methods, such as elaborated in Institute for Machine Science of the Russian Academy of Sciences Modernized Method of Discrete Vortices (MMDV) – for decision of 2D – tasks especially in this direction [4, 5]
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