Modeling of working processes of mobile transporting and overloading rope facilities
| Main Authors: | Alexander V. Lagerev, Igor A. Lagerev, Vadim I. Tarichko |
|---|---|
| Format: | Book Journal |
| Bahasa: | rus |
| Terbitan: |
Academician I.G. Petrovskii Bryansk State University
, 2022
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6044972 |
Daftar Isi:
- The book presents the results of original research in the field of computer modeling of a number of work processes occurring during the operation of mobile transport and reloading rope facilities based on autonomous self-propelled wheeled chassis of high load capacity and cross-country capability. Chapter 1 discusses the results of modeling hydrodynamic processes and optimization of hydraulic systems with frequency-throttling control in relation to mobile transport and reloading rope facilities. Practically important cases of the arrangement of adjustable throttles both in series and parallel to the drive hydraulic motor are considered. Mathematical models are presented that allow modeling the change in time of the main quantitative hydraulic characteristics of the hydraulic drive (the values of pressures and volumetric flow rates at characteristic points of the hydraulic drive), as well as the kinematic and dynamic characteristics of the pendulum motion of the load-bearing rope at the stages of acceleration, steady motion and braking. The problem of optimal selection of the main performance characteristics, structure and composition of hydraulic machines based on multi-criteria optimization and the construction of a set of Pareto-optimal hydraulic drive variants is also considered. Chapter 2 is devoted to the analysis of the results of modeling the dynamics and strength of self-propelled wheeled chassis of mobile transport and reloading rope facilities. The design and mathematical models for studying the dynamics of a promising transmission for self-propelled chassis of mobile transport and reloading facilities with increased power extraction from the regular engine of the machine to the operation of the mechanisms of movement of the main technological equipment of the mobile ropeway, as well as a technique for simulating the modes of movement of a wheeled self-propelled chassis when moving to the place of deployment and operation of a mobile ropeway are presented. The issues of 3D modeling are also considered and the analysis of the calculation results using the finite element method of the stress-strain state of a number of critical metal structures of self-propelled chassis and towed trailers is carried out in order to assess the possibility of placing the main technological equipment of mobile ropeways on them. In particular, such elements of metal construction as bearing frames of wheeled self-propelled chassis and heavy trailers and semi-trailers, elements of fastening the driver's cab, water-reflecting shield of floating self-propelled chassis, saddle-coupling and traction devices of heavy trailers and semi-trailers are considered. Based on the application of computational gas dynamics methods, the characteristics of aerodynamic resistance to the movement of special wheeled chassis and tractors have been clarified, which made it possible to refine the calculation of the maximum speed developed by them. Chapter 3 describes computer programs that implement the mathematical models and calculation methods discussed earlier.