https://sci.ldubgd.edu.ua/jspui/handle/123456789/9920 2026-04-07T04:18:57Z 2026-04-07T04:18:57Z Dziuba, L. Lishchynska, K. Chmyr, O. Tomenko, V. https://sci.ldubgd.edu.ua/jspui/handle/123456789/9946 2022-04-04T11:18:16Z 2021-01-01T00:00:00Z

Title: Influence of boundary forces on the strength of a thin-walled cylindrical tank Authors: Dziuba, L.; Lishchynska, K.; Chmyr, O.; Tomenko, V. Abstract: The strength of a thin-walled cylindrical large-capacity tank was evaluated. The walls of the tank and the bottom are simultaneously exposed to hydrostatic pressure of the liquid and additionally gas pressure-loaded. The stress at the bottom of the tank was determined taking into account the boundary forces under the combined action of hydraulic and gas pressures. The dependences for determining the boundary forces were obtained by solving the equation of deformations compatibility of a thin-walled cylindrical shell and a round plate resting on a solid surface. The influence of gas pressure increase on the magnitude of stresses was investigated.

2021-01-01T00:00:00Z Pyiypchuk, Mariya Dziuba, Lldiia Rebezniuk, Ihor Chmyr, Oksana Burdiak, Mykhailo https://sci.ldubgd.edu.ua/jspui/handle/123456789/9945 2022-04-04T11:11:38Z 2021-10-07T00:00:00Z

Title: Modeling Parametric Failures of Woodworking Machines According to the Technological Precision Criterion Authors: Pyiypchuk, Mariya; Dziuba, Lldiia; Rebezniuk, Ihor; Chmyr, Oksana; Burdiak, Mykhailo Abstract: A radial model of parametric failure of a woodworking machine according to the precision criterion based on the truncated normal distribution of a machine’s disadjustment speed caused by the wear processes in the mating of parts and components of the structure has been developed. It has been found that the density of parametric failures of woodworking machines according to the precision criterion corresponds to alpha distribution. Based on the operational observations the alpha distribution parameters of operating time to parametric failure for band saw, circular saw and milling machines have been established. It has been determined that the durations of inter-adjustment periods for band saw, circular saw and milling machines coincide with the operational data of the duration of these inter-adjustment periods for these machines with an accuracy of seven percent, which proves the adequacy of the mathematical model. The proposed model of parametric failures of woodworking machines based on the processing precision criterion allows determining the durations of inter-adjustment periods of machine operation, during which the precision of processing is ensured in compliance with the current standards.

2021-10-07T00:00:00Z Pyiypchuk, Mariya Dziuba, Lldiia Rebezniuk, Ihor Chmyr, Oksana Burdiak, Mykhailo https://sci.ldubgd.edu.ua/jspui/handle/123456789/9943 2022-04-04T10:19:29Z 2021-01-01T00:00:00Z

Title: Modeling Parametric Failures of Woodworking Machines According to the Technological Precision Criterion Authors: Pyiypchuk, Mariya; Dziuba, Lldiia; Rebezniuk, Ihor; Chmyr, Oksana; Burdiak, Mykhailo

2021-01-01T00:00:00Z Дзюба, Л.Ф. Ребезнюк, І. Т. Пилипчук, М. І. Чмир, О. Ю. https://sci.ldubgd.edu.ua/jspui/handle/123456789/9942 2022-04-04T10:09:57Z 2021-05-15T00:00:00Z

Title: ЕКСПЕРИМЕНТАЛЬНЕ ДОСЛІДЖЕННЯ ЗМІНИ СИЛИ НАТЯГУ СТРІЧКОВОЇ ПИЛКИ Authors: Дзюба, Л.Ф.; Ребезнюк, І. Т.; Пилипчук, М. І.; Чмир, О. Ю. Abstract: The change of the bandsaw tension force during wood cutting was investigated on the experimental installation created on the basis of the band saw machine. Experimental time dependen ce indicators of the tension force change in a narrow bandsaw during wood cutting were obtained. The influence ofthe pre-tension strain, the width of the saw blade and the cutting height on the pre-tension force change of the band saw was investigated.

2021-05-15T00:00:00Z