The article presents the construction of a simulation model of the operation of a container gantry crane at a cargo terminal to determine the parameters of the intensity of use of the crane as a whole and its individual mechanisms. The simulation model is being built in order to provide a more reasonable choice of crane for newly designed terminals and to assist in the operation of already in operation lifting machines to reduce accidents and improve the safety of work at terminals. To build the model, an analysis of the structure of container terminals was carried out, significant variable and constant parameters of the three main elements of the terminal were identified: the site, cargo flow and the actual lifting machine. Based on the data obtained as a result of the analysis, a simulation model in the Python programming language is built. To check the model for compliance with reality, the simulation results were compared with the readings of the remote monitoring system of a really operated gantry container crane. The comparison confirmed the assumption that the constructed model correctly reflects the features of the lifting machine at the container terminal and can be used to assess the operating mode of the crane and its mechanisms.

The article is devoted to the analysis, processing and preparation of the initial data of the registrar of the parameters of the lifting crane in order to improve the accuracy of calculations of its operation parameters. The existing sources of information on the operation of lifting machines have been studied. A method of decoding the data of the parameter recorder is proposed to increase safety and reduce the accident rate of the lifting crane.

This work is devoted to the study of power and energy indicators arising in the process of milling asphalt concrete pavements with cutting elements of road cutters. In particular, two specific types of milling drums and their interaction with asphalt concrete, depending on various factors, were studied. A mathematical model of the asphalt concrete milling process has been developed, on the basis of which a program has been created to determine the total cutting resistance forces acting on the milling drum. Finally, conclusions were drawn about the effect of cutting resistance forces on the milling drum, about the possibility of an optimal arrangement of cutting elements on the milling drum, about the expected higher level of productivity and lower energy consumption of combined milling equipment, as well as about the need for additional research in this area.

The article describes an engineering method for calculating an annular cross-flow heat exchanger in a two-dimensional formulation, taking into account the compressibility of the heated air and the cooled gas. The calculation formulas are derived on the basis of the equations of state and continuity in relation to air and gas, the equations of thermal balance, as well as expressions for hydraulic losses. The calculation according to the formulas is carried out in successive iterations, as a result of which the final air and gas temperatures, pressure losses and efficiency of the heat exchanger are found. The rapid convergence of the calculation allows for 2-3 iterations to determine the main – linear – part of the distribution of air and gas parameters in the cross section of the heat exchanger. If necessary, an increase in accuracy is achieved by increasing the number of iterations.

The article is devoted to the biography of Ludwig Henrikhovich Kiefer, an outstanding engineer, teacher and organizer of Russian technical education.