1. Dinamika masnih sistemovBoštjan Harl, Marko Kegl, Timi Karner, 2024 Abstract: Učbenik obravnava dinamiko masnih sistemov togih teles. V okviru kinematike je prikazan opis prostorskega gibanja v različnih koordinatnih sistemih, predstavljena je rotacijska matrika in njena parametrizacija ter Eulerjevi koti. Temu sledi dimamika in prikaz zakona o gibalni in vrtilni količini togega telesa. V okviru mehanskih nihanj so obravnavana lastna in vsiljena nihanja sistemov z eno in več prostostnimi stopnjami. Učbenik zaključuje področje analitične mehanike, ki vsebuje prikaz generaliziranih koordinat, virtualnega dela in generaliziranih sil. Predstavljeni so Newton-Eulerjev, Lagrangev in Hamiltonov pristop za tvorbo gibalnih enačb sistemov in njihovo numerično reševanje.
Keywords: dinamika, mehanska nihanja, analitična mehanika, virtualno delo, Lagrangev pristop
Published in DKUM: 11.03.2024; Views: 479; Downloads: 46
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2. Osnove projektiranja konstrukcij : zbirka vajErika Kozem Šilih, Mateja Držečnik, 2023, higher education textbook Abstract: Zbirka vaj "Osnove projektiranja konstrukcij – zbirka vaj" je namenjena dodiplomskim študentom Fakultete za gradbeništvo, prometno inženirstvo ter arhitekturo pri študiju gradbeništva. Prav tako je uporabna za univerzitetne programe gradbeništva, gospodarskega inženirstva ter arhitekture. Celotna zbirka vaj temelji na evropskih standardih in se osredotoča na ključne vidike projektiranja konstrukcij. Publikacija vključuje razlage in rešene primere v skladu s standardi, kot so SIST EN 1990:2004, SIST EN 1991-1-1:2004, SIST-EN 1991-1-3:2004, SIST-EN 1991-1-4:2004 in SIST-EN 1998-1 2005. Te vaje so zasnovane za razumevanje osnovnih konceptov projektiranja konstrukcij, analize obtežb ter potresnega inženirstva, kar je bistveno za razumevanje obnašanja gradbenih konstrukcij. Za dodatna pojasnila in teoretično razlago rešenih primerov se avtorici sklicujeta na učbenik "Osnove projektiranja konstrukcij". Avtorici upata, da bo ta zbirka vaj koristna študentom pri izobraževanju, poglobitvi znanja s področja projektiranja gradbenih konstrukcij in jim bo služila kot vodnik za uspešen študij in prihodnje delo v gradbenem sektorju.
Keywords: projektiranje, konstrukcija, analiza obtežb, mejno stanje nosilnosti, mejno stanje uporabnosti
Published in DKUM: 24.10.2023; Views: 539; Downloads: 102
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3. Efficient handling of stability problems in shell optimization by asymmetric "worst case" shape imperfectionMarko Kegl, Boštjan Brank, Boštjan Harl, Maks Oblak, 2008, original scientific article Keywords: mechanics of structures, optimization of structures, stability, shells, imperfection, shape design
Published in DKUM: 01.06.2012; Views: 2426; Downloads: 111
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4. Shape optimization of truss-stiffened shell structures with variable thicknessMarko Kegl, Boštjan Brank, 2006, original scientific article Abstract: This paper presents an effective approach to shape optimal design of statically loaded elastic shell-like structures. The shape parametrization is based on a design element technique. The chosen design element is a rational Bézier body, enhanced with a smoothly varying scalar field. A body-like designelement makes possible to unify the shape optimization of both pure shells and truss-stiffened shell structures. The scalar field of the design element is obtained by attaching to each control point a scalar quantity, which is an add-on to the position and weight of the control point. This scalar field is linked to the shell thickness distribution, which can be optimized simultaneously with the shape of the shell. For linear and non-linear analysis of shell structures, a reliable 4-node shell finite element formulation is utilized. The presented optimization approach assumes the employment of a gradient-based optimization algorithm and the use of the discrete method of direct differentiation to perform the sensitivity analysis.Four numerical examples of shell and truss-stiffened shell optimization are presented in detail to illustrate the performance of the proposed approach.
Keywords: mechanics of structures, shape optimization, shells, trusses, Bézier body, numerical methods, optimum design
Published in DKUM: 30.05.2012; Views: 2134; Downloads: 120
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