OPTIMIZATION OF THIN-WALLED CONSTRUCTIONS IN CAE SYSTEM ANSYS

Solving optimization problems from the standpoint of structural stresses and strains can be carried out scientifically on the example of telescopic jib. It is mainly due to the fact that despite a broad spectrum of the telescopic jib utilization there are no generally valid, scientifically proven and presented theoretical principles for their designing. From the viewpoint of the classification of mechanics, the arm of telescopic jib as a subject of study can be ranked among thin-walled constructions. In fact, it is a case of enclosed thin-walled bars stressed in operation by a combination of bending and torsion moments. Applying the Finite Element Method (FEM) in connection with the CAE system ANSYS, it is possible to design an optimum shape of the cross-section of the telescopic jib arm. Comparing the calculated values of stresses and deformations with the values obtained by experimental measuring, it is possible to evaluate the effectiveness of the optimization process.Original Abstract: Znanstveni pristup rjesavanju problema optimiranja sa stanovista naprezanja i deformacije u konstrukciji provedeno je u ovom radu na primjeru teleskopske ruke. To je uglavnom zbog cinjenice da, unatoc sirokom spektru uporabe teleskopskih ruku, ne postoje opcenito valjana, znanstveno dokazana i prezentirana teorijska nacela za njihovo projektiranje. Sa stajalista mehanike, krak teleskopske ruke, kao predmet istrazivanja moze se svrstati u tankostjene konstrukcije. U stvari, rijec je o zatvorenom tankostjenom presjeku opterecenom kombinacijom savojnih i torzijskih momenata. Primjenjujuci metodu konacnih elemenata (MKE) povezanu s CAE sustavom ANSYS moguce je projektirati optimalan oblik poprecnog presjeka poluge teleskopske ruke. Usporedujuci izracunate vrijednosti naprezanja i deformacije s vrijednostima dobivenim eksperimentalnim mjerenjima, moguce je procijeniti ucinkovitost procesa optimiranja.