Papers by Ioan Sorin V Leoveanu
Presentation - Conference in Civil Engineering Kosice 2010, 2010
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The Finite Elements Method and the Finite Volume Method numerical control of the welded structure... more The Finite Elements Method and the Finite Volume Method numerical control of the welded structures designs, subjected to different loads is more frequently nowadays. The present work proposes the estimation of the welded equivalent loading system based on the residuals deflections caused by the welded processes. For the welded structures modeled by beams, the work develops some exact algorithms based on displacements method and simplex linear transformation algorithms method. For the more complex welded structures, processed using shells and bricks type finite elements, are generated other chain of algorithms based on Greedy methods, for estimation of the optimum welding equivalent loads and implicitly the welding processes parameters.
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Advanced Materials Research, Aug 6, 2014
The paper scope consists in using the computational fluid dynamics for the simulation of waste re... more The paper scope consists in using the computational fluid dynamics for the simulation of waste reservoirs processes like the flood filling regime, flow over the dam in flood filling, and earthquake disaster. The flood regime may induce a particularly dynamics pressure on the dam walls and a particularly distribution of fluid flow inside liquid. On the other hand, when the disaster like earthquake occurs, the fluid dynamics and the induced pressures on the dam walls become extremely important for safety estimation of critical components. The dam break case is extremely important in management of safety buildings in the neighboring area of the reservoirs too. Solutions of these important civil engineering problems were obtained using the classical Navier-Stokes fluid flow equations. In the analyzed cases, the simulations were based for solving the problem of fluid with the free surface flow and complex boundary configurations by using an original program developed with MAC method.
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Se abordeaza problemele legate de modelarea metalelor, turnare si sudare, prin prisma rezolvarii ... more Se abordeaza problemele legate de modelarea metalelor, turnare si sudare, prin prisma rezolvarii cu ajutorul metodei volumelor finite.
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Lucrarea are ca scop cunoaşterea metodelor statistice utilizate la obţinerea relaţiilor matematic... more Lucrarea are ca scop cunoaşterea metodelor statistice utilizate la obţinerea relaţiilor matematice care aproximează cât mai corect procese tehnologice complexe şi utilizarea acestora la optimizarea proceselor tehnologice. Pentru a realiza scopul propus s-au analizat probleme legate de prelucrarea datelor experimentale şi programarea experienţelor, obţinerea relaţiilor statistice de calcul şi modul de stabilire a nivelului de încredere în acestea. Pentru analiza proceselor complexe, neliniare, care sunt funcţie de mai multe variabile parametru, pe lângă metodele regresiilor clasice şi analiza dispersională şi de corelaţie sa abordat şi metoda experienţelor factoriale pentru programe de gradul I şi II. Odată obţinute relaţiile matematice ca şi domeniul de definiţie al variabilelor parametru pentru care acestea au gradul de încredere dorit problema optimizării tehnologiei devine o problemă „pură” de optimizare matematică. Având în vedere particularităţile relaţiilor de aproximare obţin...
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Papers by Ioan Sorin V Leoveanu