DSpace Community: Antano Gustaičio aviacijos institutas / Antanas Gustaitis' Aviation InstituteAntano Gustaičio aviacijos institutas / Antanas Gustaitis' Aviation Institutehttp://dspace.vgtu.lt:80/handle/1/22017-03-20T15:41:20Z2017-03-20T15:41:20ZConvergence of lift force calculation of a tapered wing using non-linear section dataPakalnis, EgidijusLasauskas, EduardasStankūnas, Jonashttp://dspace.vgtu.lt:80/handle/1/32602017-02-23T09:36:33Z2004-12-31T22:00:00ZTitle: Convergence of lift force calculation of a tapered wing using non-linear section data
Authors: Pakalnis, Egidijus; Lasauskas, Eduardas; Stankūnas, Jonas
Abstract: The article presents some peculiarities of lift force calculation method using nonlinear section data. The main task is to determine an influence of iteration procedure on solution accuracy. This evaluation is a part of initiated research on potentials and application limits of the method. Set of accuracy is described in more details. Influence results of iteration procedure are presented for lift calculation of a tapered wing.2004-12-31T22:00:00ZFatigue life prediction for cyclically bent threaded connectionsJuchnevičius, ŽilvinasKrenevičius, Algimantashttp://dspace.vgtu.lt:80/handle/1/31732017-01-06T09:03:10Z2010-12-31T22:00:00ZTitle: Fatigue life prediction for cyclically bent threaded connections
Authors: Juchnevičius, Žilvinas; Krenevičius, Algimantas
Abstract: In this paper it is shown that the modified normative method improved by incorporating in the calculation the data of load distribution in threads is fitted for the fati-gue life prediction of cyclically bent threaded connections. The model for calculation of load and stress distribution along the thread based on elastic deformation properties of the full and partial profile turns pairs is used. Results of fatigue life prediction obtained for the cyclically bent threaded connections M16×2 are close to the experimental values, howerer do not exceed them.2010-12-31T22:00:00ZTheoretical aspects of the calibration of geodetic angle measurement instrumentationBručas, DomantasŠiaudinytė, LaurynaRybokas, MindaugasGrattan, Kenneth Thomas Victorhttp://dspace.vgtu.lt:80/handle/1/31462016-12-30T08:48:00Z2013-12-31T22:00:00ZTitle: Theoretical aspects of the calibration of geodetic angle measurement instrumentation
Authors: Bručas, Domantas; Šiaudinytė, Lauryna; Rybokas, Mindaugas; Grattan, Kenneth Thomas Victor
Abstract: There are multiple instruments directly implementing the principle of angle measurements (horizontal and vertical) for its function ing, used in geodesy, surveying and machine building (like tacheometers, theodolites, laser scanners, laser trackers etc.). As for the moment, there is no official reglamentation regarding calibration and testing of such instrumentation in entire range of the measurements, though instrumentation produce a huge number of both horizontal and vertical angular values during its normal implementation. In the paper the theoretical assumptions of such instrumentation testing and calibration together with examples of some practical tests are given.2013-12-31T22:00:00ZIncreasing of the accuracy of vertical angle measurements of geodetic instrumentationBručas, DomantasŠiaudinytė, LaurynaRybokas, MindaugasKulvietis, GenadijusSabaitis, Deividashttp://dspace.vgtu.lt:80/handle/1/31452016-12-30T08:29:35Z2013-12-31T22:00:00ZTitle: Increasing of the accuracy of vertical angle measurements of geodetic instrumentation
Authors: Bručas, Domantas; Šiaudinytė, Lauryna; Rybokas, Mindaugas; Kulvietis, Genadijus; Sabaitis, Deividas
Abstract: There is a vast number of geodetic angle measurement equipment (like techeo meters, theodolites, laser scanners etc.) implemented in the geodesy, civil engineering, construction engineering etc. The accuracy of measurement of mentioned equipment directly influence the quality of buildings, private state measures etc. Though there is a methodology of testing of such equipment officially adopted, such methodology allows determination of solely random errors of measurements at several angular positions of the instrument. The accuracy (random errors and biases) is still unknown for huge part of the angular values generated by the instrument while measurements. In the paper the theoretical assumptions on possible increasing the measurements accuracy by means of precise calibration in a bigger range of possible measurements is described together with some examples of practical solution of the problem.2013-12-31T22:00:00Z