Browsing by Author "Slavchev, Yanko"

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    PublicationOpen Access
    Modelling and simulation research on the metal structure of bridge cranes
    (2011) Izurriaga Lerga, Javier; Malanda Trigueros, Armando; Slavchev, Yanko; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Technical University Sofia (Bulgaria); Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    The carrying metal construction is the most metal-intensive part of overhead cranes and is often subject to optimization and mass reduction. The objective of this project is to reduce the structural mass of a real-world double girder overhead crane, produced by Kranostroene Engineering – Sofia, through the use of modern computer modeling and simulation methods and applications. Following closely the established theoretical foundations and engineering checking schemes the structure mass reduction must be verified by structural static stress simulations. So, for the fulfillment of the project objective, the following tasks will be completed: - Accumulating specific awareness of modern computer modeling and simulation tools and applications, such as SolidWorks, ANSYS, Workbench and the Finite Element Method - 3-D modeling and static structural simulations of a double girder overhead crane in order to establish its detailed 3-D structural response. This includes static stress analyses, frequency analyses, comparison with the well-known theoretical foundations and the Euler-Bernoulli formulations. - Generating models of reduced crane mass. Perform 3-D modeling and structural simulations of the static structural response of the new designs and provide evidence that they conform to standard requirements and do not deviate significantly from the original crane response.
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    PublicationOpen Access
    Modelling, analysis and options for improvement of horizontal axis wind turbine design
    (2014) Rebollo Mugueta, Cristina; Slavchev, Yanko; Malanda Trigueros, Armando; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa; Technical University of Sofia (Bulgaria); Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    Eolic technology is considered one of the most promising areas of renewable energy sources. However, the manufacturing and installation of wind turbines are quite costly and produce pollutants. Furthermore, wind turbines are subject to different and sometimes unknown types of aerodynamic loadings in their life time operation. The objective of this paper is to model, simulate and analyse the response of a computer modelled HAWT and eventually propose and study options for its improvement, primarily through the introduction of modern blade airfoils. The modelling and simulation (M&S) stage encompasses the use of computer-aided design (CAD) applications for constructing the model as well as computational tools like the finite element method (FEM), the blade element method (BEM), the Newmark method, computational fluid dynamics (CFD) and others for simulating and analysing the response of the HAWT both in its default design configuration and in the improved design configuration. The computational tools are properly combined so that on one hand to be able to compare the results for the proposed cases and on the other hand to be more computationally effective. The effectiveness pursuit is both in time and in the available hardware resources.